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DDoS Extortion Attempts On the Rise

John Flabasha writes "There's an excellent article that originated on the LA Times and was syndicated to Yahoo News about DDoS attacks on online gaming and one of the solutions out there. Since when did ISP null routes go out of style?" We've run a number of previous stories about DoS blackmail attempts, like this one or this one.

277 comments

  1. Null routes? by IversenX · · Score: 4, Informative

    Sure, Null Routes are great for throwing away traffic, but they don't work against DDoS (notice the extra "D"!). The whole _point_ of DDoS is that the traffic comes from so many sources that the manual work involved in blocking it is huge.

    --
    With great numbers come great responsibility!
    1. Re:Null routes? by antifoidulus · · Score: 4, Insightful

      Not to mention that the zombies you are blocking may very well be potential customers(note that they are attacking gambling sites), never a good idea to block your customers.....though educating them might not hurt.

    2. Re:Null routes? by Rares+Marian · · Score: 3, Insightful

      Exactly why is letting a DDoS crush your service to everyone when they attack on of your sites better than blocking customers in one group?

      --
      The message on the other side of this sig is false.
    3. Re:Null routes? by Anonymous Coward · · Score: 0

      I believe Null routing is still used. What they do is assigned the source address an AS of 666. This gets propagated through the BGP routing tables. Not all but many ISPs will null route anything with a 666 AS. This allows for attacks to be stopped closer to the source. I have no idea how wide spread this is, does it extend past north america? is it used in europe or anywhere else...

    4. Re:Null routes? by icedivr · · Score: 1, Insightful

      You don't null route the source of the traffic, you null route the destination. As the route propagates through BGP, routers across the world suddenly start returning 'no route to host' type messages, thus rendering a DDoS ineffective.

    5. Re:Null routes? by tomstdenis · · Score: 4, Informative

      Um you can easily do an hour ban on excessive hits from a given IP. Write a module for Apache that counts the hits from a given IP. If it hits a certain threshold [say > 100 hits a minute or >x KB per second] then it simply adds the ip to a firewall [ipchains, netfilter, etc].

      By making the banning automated you can easily cope with a DDoS.

      Some other things to help cope

      - Make small pages, well compressed images

      - Don't make highly detailed pages you can get to without loging in first [e.g. avoid server cpu load]

      - Load balance ;-)

      Tom

      --
      Someday, I'll have a real sig.
    6. Re:Null routes? by Shakrai · · Score: 1

      Some other things to help cope

      Make small pages, well compressed images

      Don't make highly detailed pages you can get to without loging in first [e.g. avoid server cpu load]

      ...

      That sounds more like a lesson in how to survive a slashdotting then a DDoS. Or are they one in the same?

      --
      I want peace on earth and goodwill toward man.
      We are the United States Government! We don't do that sort of thing.
    7. Re:Null routes? by Matthew+Weigel · · Score: 2, Insightful

      From the perspective of the host going down... no.

      --
      --Matthew
    8. Re:Null routes? by Anonymous Coward · · Score: 0

      Um you can easily do an hour ban on excessive hits from a given IP. Write a module for Apache that counts the hits from a given IP.

      This won't stop the syn traffic from traversing your network (and pipe to your ISP, which you're likely paying for). On a poorly configured machine, this could also consume all available sockets, among other things. Basically, it comes down to how much bandwidth you have available, and how much you're willing to PAY for (if you're billed for over use).
      The Apache module you're referring to would have little or no effect in a proper DDoS situation.

    9. Re:Null routes? by devitto · · Score: 1

      Doh! Idiot!
      "This rendering a DDoS ineffective" ????
      You just sent your site down the tubes!

      Null routing is only any use if they are performing a resource attack against a shared resource (bandwidth, connections, CPU etc) were you can take the "hit" of loosing one entity to ensure another survives.
      In most cases nullrouting is useless for businesses.

    10. Re:Null routes? by Erik+Hollensbe · · Score: 2, Informative

      Those customers complain and somebody makes an overbearing stink about it, and new customers don't come.

      Reference: here

      The stink gets advertised long before it's put into context.

    11. Re:Null routes? by Cramer · · Score: 2, Informative

      It doesn't work like that. BGP doesn't specify a destination for a prefix -- it's more a "give me X" type thing; the destination is the peer announcing the prefix. Likewise, you cannot easily punch a hole in the middle of your netblock with a null route. (in fact, the null route is how you ensure the netblock is always announced.) Add to that all the peering filters and the minimum prefix length (/20, btw), and "it's just not gonna happen". That traffic is going to show up at the ISP along with all the traffic you really do want. There's no way to get the entire internet to filter it for you. That's why the DDoS is such an annoying bugger.

    12. Re:Null routes? by tomstdenis · · Score: 3, Insightful

      um ... a socket is only allocated to a connect() call. If you ban the IP on the firewall side the SYN is simply ignored.

      So yes, the 40 byte SYN packet consumes bandwidth coming in. But you don't expend bandwidth or cpu time otherwise [e.g. no ACK/SYN going the otherway]

      Although that raises an interesting question. Who should pay for the bandwidth coming in? Just like who should pay for SMS? I didn't choose to have a SMS plan [well ok by signing up I did, but they don't have non-SMS plans]. So if some ass decides to SMS-bomb my cell why should I pay for it when my cell company didn't protect me?

      So if you firewall some jackass with a fat-pipe who decides to connect flood you and you do your part by not opening the connections who should pay for it?

      I think this is a good way to transfer some responsibilities back to the ISPs [in particular the originating ISP, something fishy about the same or similar HTTP request occuring 1000s of times a minute from a DSL...] and ultimately the user. Just like how spam should [ideally] be handled....

      Oh yeah...

      Tom

      --
      Someday, I'll have a real sig.
    13. Re:Null routes? by AmishSlayer · · Score: 1

      Exactly why is letting a DDoS crush your service to everyone when they attack on of your sites better than blocking customers in one group?

      It would be a nice idea, but the DDoS attackers would simply have their programs assign random fake IP addresses to each phony request. They do not need to have the junk responses returned to them.

      They could also spoof IPs of other servers vital to the one they are attacking so if they mistakenly blocked them they would be in a world of hurt.

    14. Re:Null routes? by Kent+Recal · · Score: 3, Informative

      Unfornationally this doesn't really work.
      Zombie software is usually smart enough to be set on a target domain name, not ip address. Once your hostname starts resolving to a new ip the zombies will attack the new target. If you change to a completely different domain you'll have to announce it to your customers - and the attacker will likely pick it up on the same channel.

    15. Re:Null routes? by Kent+Recal · · Score: 1

      Two problems:

      1. A full fledged ddos attack will likely saturate your switch-port (if it's 100mbit) so your webserver will not receive a lot of legitimate requests anymore.

      2. Your ISP is going to bill the ddos packets to you if you don't tell them to cut it off. 400 zombies sending at 25k/s each would suffice to deliver 10M/s to your front door. Given a few big pipes (office or *shudder* university lines) on the zombie network drastically reduce the number of zombies required to plug up a 100mbit-link but most of the ddos attacks I have read about were just using an insane amount of cablemodem-zombies (800+).

    16. Re:Null routes? by tomstdenis · · Score: 1

      How do you send 25k/sec? That's 640 SYN packets/sec or roughly a latency of 1.56ms. Considering the RTTs I get with various sites that doesn't seem plausible from a cable modem.

      Besides you can also augment the module to forward the IPs to ban securely to your ISP. My god you people have no creativity. :-)

      The point is it's trivial to automatically cut people off on the server side [e.g. to avoid serving pages or even establishing the TCP connection]. If you make it securely tell your ISP what to ban you can even cut them off at that gate too.

      Tom

      --
      Someday, I'll have a real sig.
    17. Re:Null routes? by mpcooke3 · · Score: 1

      That's not quite understanding the scale of the problem.

      A DDOS will also cause most loadbalancers and firewalls to fall over even if you have the machines numbers to deal with it. But all this is irrelevant as your line will be saturated.

      If you are hosted at a small ISP they may also be totally saturated to their upstream provider and they will need to contact them.

      If your on a tier 1 backbone your uplink will saturate quickly particularly if you are only on a 100MB/s burstable line and probably the network section that you are on will also be saturated. This will mean that the tier 1 ISP will probably be desperately trying to filter the incoming traffic at it's borders.

      Your best bet may be to pay for an expensive ISP package by a company designed to protect against against DDOS attacks, possibly you could hide behind an edge serving network though both these solutions are not guaranteed - and they can be very expensive. Even Akamai has been taken down by DDOS attacks on their DNS system.

      Matt.

    18. Re:Null routes? by gehel · · Score: 1
      Um you can easily do an hour ban on excessive hits from a given IP. Write a module for Apache that counts the hits from a given IP. If it hits a certain threshold [say > 100 hits a minute or >x KB per second] then it simply adds the ip to a firewall [ipchains, netfilter, etc].


      Actually this is used in real life. I had a research project going on this at my university. Actually, what we did was comparing the current packet rate (current = last 5 minutes) to the average packet rate (let's say for the past 3 days). If the current rate is greater than average +- (alpha * std_dev) you have a problem.

      If you classify traffic by destination port, then you can detect worm or DDOS attack on a specific port and route the traffic to an analyser. This can give a fairly low false positive rate if you tune alpha and the sliding average well.

      We didnt actully use that to disgard traffic, but just to analyse it. As soon as you use an "active" sensor, you have to be carefull about it used against you ...
    19. Re:Null routes? by Kent+Recal · · Score: 1

      How do you send 25k/sec? That's 640 SYN packets/sec or roughly a latency of 1.56ms. Considering the RTTs I get with various sites that doesn't seem plausible from a cable modem.

      I can easily send 40kb/s from home, and I'm only on a weak DSL link.
      You do know that you don't have to wait for a 3-way handshake to finish to initiate another connection, right? ;)
      In practice any not-so-braindead zombie will just flood syn's and may process some the synacks as they flow in, if at all. The goal is to take the remote host down, not to implement proper tcp.

      And as said, it is unfornationally not trivial to cut all attackers off.
      You can hit a portion of them but when blocking full subnets you're likely to hurt some legit customers, too. Smart zombies may also cycle through different attack patterns, one of which could be a set of random legit looking sessions that makes them hard to distinguish from real users.

      A sophisticated attacker will profile your site for "expensive" links (think "search function" or dynamic content coming from a slow backend) and come up with fake sessions that focus on these expensive operations.

    20. Re:Null routes? by UFNinja · · Score: 1

      Is it so hard? A smart IDS can detect DDoS activity, and then you place those hosts into non-routed VLANs. If your ISP is worth its salt, they'll have hardware and/or software that can handle the relatively miniscule task of detecting DoS attempts from hosts within your network and making sure that they are effectively removed from the network.

    21. Re:Null routes? by irc.goatse.cx+troll · · Score: 1

      Which is fine and dandy if you live in the magical world of unlimited bandwidth. Lets say hypothetical situation:

      Site has 100mbit of bandwidth
      Site only allows packets from the ip 1.2.3.4, rest is silently dropped (not even sending a RST or anything)
      200mbit worth of packets are flying towards site.

      What happens when 1.2.3.4 tries to connect to the site?

      --
      Pain lasts, kid. Its how you know you're alive. Sometimes I think this growing up thing is just pain management-TheMaxx
    22. Re:Null routes? by tomstdenis · · Score: 1

      It's easy to send 40KB/sec when your packets are 1KB in size. Not so easy when they're 40 byte SYN packets [or whatever the size is].

      I agree that my idea won't stop a SYN flood. The idea is to stop stupid kiddies who "wget flood" your box.

      What I don't get is why ISPs allow forged SYNs out in the first place. If they only checked the source IP before routing it outwards this wouldn't be an issue because then other ISPs could just monitor SYN traffic and ban the ip on the fly.

      Tom

      --
      Someday, I'll have a real sig.
    23. Re:Null routes? by mindstrm · · Score: 1

      There is generally a significant lag between changing DNS and the zombies re-tasking, at least with the current generation of zombies. Like any good app, they do a DNS lookup when they start, and then do their thing.

      Some require a manual restart in order to be re-tasked to a new IP.

      At the moment, it is probably possible to stay ahead of these zombies by rotating IP addresses.. but that's not a long or even medium-term solution, as simple changes to zombie code will make this ineffective. It's also just plain messy.

    24. Re:Null routes? by djrogers · · Score: 1

      This only helps if your DDos is a resource based DDoS attack, such as a connected session flood, request flood, or connection table overflow. SYN floods on the other hand can come from spoofed IPs - it wouldn't take long for a DDoS'er to use your firewalling technique against you force you into firewalling off the entire Internet...

      --
      Think outside the... Hey, where'd the friggin' box go?
    25. Re:Null routes? by tomstdenis · · Score: 1

      There is no solution to that problem other than to ensure that each ISP is responsible. No matter what you do at your gateway short of just disconnecting a network you can't stop packets from comming in.

      What would help SYN spoofing is responsible ISPs that check the source address and discard invalid IP packets. My proposal is for people who connect flood a server.

      --
      Someday, I'll have a real sig.
    26. Re:Null routes? by Anonymous Coward · · Score: 0

      So if you firewall some jackass with a fat-pipe who decides to connect flood you and you do your part by not opening the connections who should pay for it?


      Then some smart-ass come up with a way to transmit data by the pattern of the incoming packets. You could firewall off every port, but still receive data (kinda like Port Knocking). An analogy would be to have two (or more ) phone lines, and not answer any of them, but people can still send you information by ringing them in morse code.

    27. Re:Null routes? by irc.goatse.cx+troll · · Score: 1

      Exactly. I'm saying you're fucked either way, as theres no way to block a good DDoS and thats what makes it so effective.
      The only possible solution I can think of is give everyone ungodly ammounts of bandwidth so as to make it harder to fill someones upstream, but still its easier to get more bots than someone has bandwidth.

      The day someone thinks of a way to effectively stop DDoS is the day someone becomes really rich.

      --
      Pain lasts, kid. Its how you know you're alive. Sometimes I think this growing up thing is just pain management-TheMaxx
    28. Re:Null routes? by mxs · · Score: 1

      Your advice is good only for conserving bandwidth and delivering good performance with man regular users.
      You obviously haven't been dDoSed properly, yet.

      If you block the requests once they hit apache, it's already much too late. Consider an average load of, say 150hits/sec (which is a reasonable-size load for one dedicated box with some dynamic content). Now consider the load, say, 10000 drones will be able to create on your server -- not just with plain http requests (say, one per second per drone), but also with plain bandwidth attacks ("let's just send a shitload of nonsense-packets to port 80").
      Also, by the time you get to count on apache, the pipe is already saturated.

      Load balancing doesn't even enter the equation if the attacker attacks ip-based (assuming DNS round-robin); if you have dedicated balancing hardware, even that can be dDoSed into oblivion in most cases.

      Note that dronenets of 10000 are on the small side. They come in much larger sizes.

      So that's that for "easily coping with dDoS" ... It'll easily cope with a kid that found apachebench. It'll not make an iota of difference in a real attack. May that never happen to you, especially not on, say, xmas eve or new year's. Trust me, that's no fun.

  2. Pay up by Anonymous Coward · · Score: 5, Funny

    Pay up or I'll suggest a /. article about you, and you know the editors will accept it too!

    1. Re:Pay up by Anonymous Coward · · Score: 0

      And they'll post it twice or thrice too!

    2. Re:Pay up by lrucker · · Score: 1
      Pay up or I'll suggest a /. article about you, and you know the editors will accept it too!

      Roland, is that you?

    3. Re:Pay up by uncoveror · · Score: 1

      It is a bad investment to only buy basic protection when you can get Pre-Paid Illegal Services. Now that's an offer you can't refuse!

      --
      The Uncoveror: It's the real news.
    4. Re:Pay up by Ghouki · · Score: 0

      ..and remember to keep those payments coming ...otherwise the editors will dupe the story!

      --

      insert witty comment here
  3. Send money, or else. by Kenja · · Score: 3, Funny

    If you dont send 1,500$ to the following PayPal acount I will post an article about your company on Slashdot.

    --

    "Have you ever thought about just turning off the TV, sitting down with your kids, and hitting them?"
    1. Re:Send money, or else. by LiquidCoooled · · Score: 5, Interesting

      Its amusing to note peoples reactions when they hear that XYZ is suffering a DDOS attack.
      They invariably open the browser and attempt to open the site.
      Its natural human instinct, they open it, say "Yup, its still down" and either click refresh a few times, or close it.

      Watching how slash/fark folks handle flooding a site is similar.

      --
      liqbase :: faster than paper
  4. How long... by Tyndmyr · · Score: 5, Funny
    Ever been tempted to track the random people who attempt to hack/spam you, and beat them senseless? If only we could network this...I'll beat the people that live near me, and we can all post our catches on a forum somewhere...

    If only it were that simple.

    --
    Support more choices in goverment-Vote 3rd party.
    1. Re:How long... by YankeeInExile · · Score: 5, Funny

      While fantasizing about vigilanteism is entertaining, it really is not a good idea, just because of the lack of control.... to-wit:

      Hey, HeadCrackers Ltd. I was recently DDoSed by a group of hackers, led by someone who uses the slashdot handle Tyndmyr. I don't know anything else about him, but I would really appreciate it if someone would lop off a few fingers. Not only did he totally scrag my website "e-My-pretty-pony", costing me millions of dollars in lost sales revenue overnight, but he sent henchmen to my house who dyed my cat blue! I really hate him! MURDER! DEATH! KILL!
      I think this should illustrate the potential for abuse.

      HAND

      --
      How does the Slashdot Effect happen given that no slashdotters ever RTFA?
    2. Re:How long... by multiplexo · · Score: 1, Funny
      Ever been tempted to track the random people who attempt to hack/spam you, and beat them senseless?

      Yes, and I've thought of doing more than that. I wonder how the cracking community would respond if one of their members, such as the Russian guy mentioned in this article, were slowly tortured on a video that was then distributed over the net. I think if you were to take one of these guys and cut his fingers off with a pair of bolt cutters, and then burn his eyes out with a torch, and then deafen him by playing 100 decibel music into his ears as well as cutting his balls off and scarring his body by writing "We 0wnz0r you" on his body with a paintbrush dipped in acid that perhaps these crackers might think about finding honest work.

      --
      cheap labor conservatives - they want to keep you hungry enough to be thankful for minimum wage.
    3. Re:How long... by eln · · Score: 4, Funny

      Oh that's it, Tyndmyr is totally dead. I'm so sick of that bastard pulling this crap. Your wish is my command. Tomorrow Tyndmyr's cat will be purple with pink polka dots.

    4. Re:How long... by red+floyd · · Score: 4, Funny

      So that would be a DBSOT Attack? (Distributed Beat the Shit Out of Them)

      --
      The only reason we have the rights we have is that people just like us died to gain those rights. -- Cheerio Boy
    5. Re:How long... by Ced_Ex · · Score: 2, Funny

      Nothing funnier than computer nerds threatening other computer nerds!

      But good idea though. I can video tape it and we solve two problems. 1. We get rid of hacks/spam. 2. We profit on the videos!

      Sidenote: Wasn't there a video clip with some guy getting his buddy to hit him in the face with a keyboard?

      --
      Live forever, or die trying.
    6. Re:How long... by Anonymous Coward · · Score: 0

      I am always heartened when I see a post by someone who thinks like I do.

      You clearly understand the value of deterrence.

      Make the ramifications of being caught doing something like this so horrible that anyone even suggesting doing it would be told "Oh no. That's a bad, bad idea and we want no part of it. Please remove yourself from our presence immediately. We want nothing more to do with you."

    7. Re:How long... by Anonymous Coward · · Score: 1, Funny

      Dear Mr. Multiplexo,

      We would like to invite you to join our interrogation efforts in Iraq. Please contact me as soon as possible.

      Sincerely,
      Donald H. Rumsfeld
      Secretary of Defense

    8. Re:How long... by AndroidCat · · Score: 1

      It might give new meaning to Flash Mobs.

      --
      One line blog. I hear that they're called Twitters now.
    9. Re:How long... by russint · · Score: 1

      Actually, nothing funnier then rich computer nerds who grew up in a happy little rich community and wouldn't knew a fight if it bit them in the ass trying to threaten someone.

      --
      ^^
    10. Re:How long... by Anonymous Coward · · Score: 0

      nothin funnier than trailer trash nerds

    11. Re:How long... by bleckywelcky · · Score: 1

      In all seriousness, being a vigilante may be the only answer for this. The traits of this e-commerce extortion are indicative of organized crime behaviour. Really, this guy just needed to hire a couple security gurus to track the the guys doing the work. Then a couple of tough guys to go over and rough up the guy doing the work to find out who his bosses are. Then, confirm their involvement in it and take them out of the picture with a silenced 9mm. When this kind of crap happens in Russia or former Soviet Bloc countries, you're on your own. If you do all of the research and give the police every last thing they need to just pick up a guy ... fine - they'll do it, but nothing more. So you just "handle" situations your self. And if you clean up after the fact and make it look like the guys that you took out of the picture just disappeared, no one will care. They were scum anyhow.

    12. Re:How long... by WoBIX · · Score: 1

      Sounds like a wonderful idea. Back in '94 some tool decided that he didn't like my friend using the same nick as he frequently used on Efnet, so he then proceeded to harass and flood him. Since security wasn't as big an issue then as it is now, his IP address wasn't masked, and I went adventuring. His ISP had a telnet daemon with guest access running, something else you wouldn't see today. It didn't take very long to find his username, and real name. Once we got those, then it was just a matter of using the matchmaking app they also had available for guests, to get his height, weight, hair color, likes and dislikes. By this time we were really amused, then came the fun part. Spoofing an email from a fictional dean of the local University's CS department, to the idiots email address threatening to have his ISP revoke his account and have charges of harassment levied against him for his attack on "one of our students". As an added touch we addressed him by name. Within 5 minutes of sending the email my friend received a /msg of profuse apologies, and the flooding ended. Not that it was anything more than an inconvenience. We were using OS/2 Warp on our machines and it stood up to the abuse quite well. So, it wasn't very complicated, but it definitely was a rewarding experience :) Almost "hackerish". Oh, and GREG CHAPMAN, if you're reading this: Got you, sucker! :)

    13. Re:How long... by garwain · · Score: 1

      thanks, but I waste enough time tracing down infected systems that attack my server (trying to install old windoze worms on my linux/apache setup) and spamming me, and just reporting them to their ISPs hoping that someone will contact the person responsable for the machine and get them to clean it up, or disconnect it.

    14. Re:How long... by F'Nok · · Score: 1

      So that would be a DBSOT Attack? (Distributed Beat the Shit Out of Them)

      What about a Distributed Beat the Shit Out of DDoSers?

      Then we could even blame Microsoft for those nasty Distributed BSOD's that are going around! :)

  5. Not all attacks can be blocked. by Carnildo · · Score: 4, Funny

    You can't null-route a slashdotting.

    --
    "They redundantly repeated themselves over and over again incessantly without end ad infinitum" -- ibid.
    1. Re:Not all attacks can be blocked. by Carnildo · · Score: 3, Informative

      You can't block incoming referrals from a particular site? I know with my website tracking software at least, it displays the referring URL. I'd figure you could set a filter based on that info... Weird.

      I know my web browser sets the referrer URL to that of the site I'm going to, and I suspect many other people do the same thing. It prevents blacklisting based on referrer, and it has the side benefit of allowing hotlinking from Geocities and other cheap hosting.

      --
      "They redundantly repeated themselves over and over again incessantly without end ad infinitum" -- ibid.
    2. Re:Not all attacks can be blocked. by legirons · · Score: 1

      "You can't null-route a slashdotting."

      Bugzilla does

    3. Re:Not all attacks can be blocked. by Minwee · · Score: 1
      Sure you can.

      # ifconfig fxp0 down

      There you go. Now nothing can drive up the load on my web server.

    4. Re:Not all attacks can be blocked. by dweezil-n0xad · · Score: 1

      I can't figure out how to do this. How can one change the referrer in Firefox?

    5. Re:Not all attacks can be blocked. by Carnildo · · Score: 1

      I use a combination of Opera and the Proxomitron. Privoxy should be able to do this as well, or if you're feeling geeky, you could write a filtering proxy to do this using Perl's HTTP::Proxy module.

      --
      "They redundantly repeated themselves over and over again incessantly without end ad infinitum" -- ibid.
    6. Re:Not all attacks can be blocked. by dweezil-n0xad · · Score: 1

      I can't use Proxomitron because that's windows only, but I checked the Privoxy manual and indeed, it can be done: http://www.privoxy.org/user-manual/actions-file.ht ml#HIDE-REFERRER
      thanks for the advice! now it's time to set up this privoxy thingy :)
      I still wonder if it's possible to write a firefox extension for forged referrers.

    7. Re:Not all attacks can be blocked. by Carnildo · · Score: 1

      I've found that the Proxomitron works just fine under Wine.

      --
      "They redundantly repeated themselves over and over again incessantly without end ad infinitum" -- ibid.
    8. Re:Not all attacks can be blocked. by bedessen · · Score: 1

      No, they do not. They block requests based on the HTTP Referer field. That is very different than null-routing, which is obvisouly a distinction you don't understand. One is about blocking packets in your ISPs upstream, before they even arrive at your system. This is the only way to deal with a true denial of service attack (not a slashdotting). Anything that blocks at the application/webserver level is only effective against resource-depletion attacks, or slashdottings. When you're being (D)DoS-ed you get so many packets that they overwhelm your connection completely, making it futile to even bother looking at the packets because there would be no way to let the legitimate ones through even if you wanted to. In other words, a stream of 200MBit/s flowing to a 10MBit/s link renders it totally useless, you might as well just shut it off.

    9. Re:Not all attacks can be blocked. by legirons · · Score: 1

      "No, they do not. They block requests based on the HTTP Referer field. That is very different than null-routing, which is obvisouly a distinction you don't understand."

      Blimey - way to miss the point and get an insult in too... Bugzilla is immune to a slashdotting, which either means that a slashdotting isn't DDoS, or that null-routes are irrelevant in this case.

      Maybe I should make all posts into 3-page legalspeak, so that the pedants don't get a chance to tell us yet again what buzzwords they learnt from reading nanog.

  6. DOS Blackmail by Anonymous Coward · · Score: 5, Funny

    Noone's going to blackmail me into using DOS again...

    was that MS-DOS TRS-DOS, or Apple DOS?

    1. Re:DOS Blackmail by CRepetski · · Score: 1

      I would pay to not use DOS.

    2. Re:DOS Blackmail by Anonymous Coward · · Score: 0

      Didn't you see the extra D? It must be Dr. Dos

    3. Re:DOS Blackmail by Shakrai · · Score: 2, Funny

      I would pay to not use DOS.

      I guess a lot of people do.

      --
      I want peace on earth and goodwill toward man.
      We are the United States Government! We don't do that sort of thing.
  7. They get rather annoying... by mc_wilson · · Score: 5, Interesting

    The school network here has been getting attacked about once a week for the last month. I am really tired of the internet going down and getting 60% packet loss this often.

    I am not sure why we would be getting DoS attacks at a major university. The people who run resnet have a site that says what a current problem is. Their solution to DoS attacks appears to be waiting them out. When the problem becomes "solved" the "solution" normally states "DoS attack has finished." I wish they would try something that would prevent them. Stupid CIS...

    1. Re:They get rather annoying... by bani · · Score: 0, Troll

      because you have fucktard students getting in petty little my-penis-is-bigger-than-yours battles on irc.

      firewall irc from resnet and the dos attacks will stop.

    2. Re:They get rather annoying... by mc_wilson · · Score: 1

      I figured it was either that or because of a certain website hosted on campus.

    3. Re:They get rather annoying... by josecanuc · · Score: 2, Interesting

      oh man... It was great when I was in school there (where you are)... It was about 2 years after they started wiring the dorms for student network access (ethernet anyway -- prior to that there were serial terminals...) So few people had computers in the dorms, coupled with the fact that the campus had not yet "shaped" all dorm traffic to a 100 Mbit virtual pipe. Student printing was not limited -- I printed over a dozen 500+ page programming books straight from the dorm to the Teague building without question from those in charge. (I might be a small part of the reason they did impose print limits, though.)

      But even then CIS was stupid... Nothing's changed there!

      Last I heard they were planning on getting a 10 Gbit pipe to the "regular" Internet and another 10 Gbit pipe to Internet2. Makes a DoS of one server on campus a large threat with that much incoming bandwidth.

    4. Re:They get rather annoying... by mc_wilson · · Score: 1

      But even then CIS was stupid... Nothing's changed there!
      Yeah, not much is allowed to change around here. They seem to hate anything new.

    5. Re:They get rather annoying... by Anonymous Coward · · Score: 0

      OT: Very rare to see such a low uid posting on slashdot. when did you graduate from tamu?

    6. Re:They get rather annoying... by AK+Marc · · Score: 1

      Student printing was not limited -- I printed over a dozen 500+ page programming books straight from the dorm to the Teague building without question from those in charge. (I might be a small part of the reason they did impose print limits, though.)

      Well, I started there back before we had Internet email. "Why do I have to change my email from bitnet to that new-fangled Internet thingey?" And the students were the biggest problem. There weren't any connections to the dorms, but I'd get on Gopher or Lynx and find things to download. Pull down 500+ page manuals and print them to just about any printer on campus. I could do it from my room, but only if I dialed in, with my 9600 modem (this isn't an "in my day" post, just talking about how even though things change, they still stay the same).

      We'd hop on and use VNEWS and such to waste time all day long. Email and FTP for transfering data, and burn CPU time compiling code for personal reasons. I'd suspect that there was precious little of the resources being used for school related purposes.

      But even then CIS was stupid... Nothing's changed there

      Seconded, but when you only hire students or grossly underpaid and underqualified (for the responsibilities) ex-students, you will not end up with a good policy or effective implimentation of said policy.

    7. Re:They get rather annoying... by dougmc · · Score: 4, Interesting
      I am not sure why we would be getting DoS attacks at a major university.
      It's probably aimed at one individual. I get packeted at home on my cable modem because people want the nick I use on IRC, for example. Typically if they can flood me badly enough, it only takes 10 minutes to kick me off and get my nick, but sometimes they'll leave the flood going for hours or even days, I guess to `teach me a lesson' or something. What lesson have I learned? To log everything, and make phone calls while it happens, and emails to all the IP addresses involved when it's done. I've nailed one guy already that I know of (in Romania no less -- visited by the local police. I don't know how it turned out, however.) -- it's rarely effective, but if you keep at it, it'll eventually work.

      I wish they would try something that would prevent them. Stupid CIS...
      Tell us, how should they prevent them? Since you've labeled them as stupid, I'm sure you have the answer all figured out? We'd love to hear what the victim of a DDoS attack can do to prevent an arbitrary DDoS attack.

      Filtering on your router doesn't work, because it's usually your pipe that's overloaded. (Though schools often have huge pipes.) Having your provider filter can be effective, but not all attacks are easy to filter. Buying more bandwidth and faster routers is usually effective -- I'm sure you won't mind your tuition going up to cover the costs? Turning off the campus resnet completely would probably be effective ...

      You got any better ideas?

      No, I don't work for your school's CIS. But I certainly understand their position.

    8. Re:They get rather annoying... by StarWreck · · Score: 1

      Sorry about that. I didn't know it was affecting you and everyone else going to our University. Its not technically a DOS attack... I was trying to bring my share ration up on BitTorrent so I set the upload rate to 45MB/s... and well, hehe... the stupid Techies didn't bother putting any kind of bandwidth limitations on the network allowing 1 guy to use ALL of the bandwidth.

      --
      ... and in the DRM, bind them.
    9. Re:They get rather annoying... by asdfghjklqwertyuiop · · Score: 1

      I wish they would try something that would prevent them.


      Such as...?
    10. Re:They get rather annoying... by dougmc · · Score: 1
      I figured it was either that or because of a certain website hosted on campus.
      Certain website = http://www.johnkerryisadouchebagbutimvotingforhima nyway.com/ ?

      What makes you think that's hosted at the A&M campus? The IP address resolves back to ip-64-202-167-129.secureserver.net, and doesn't appear to be anywhere near A&M's netblock.

      Generally it's pretty easy to tell what the DDoSers are after -- they usually attack the exact address that bothers them. If it's a web site, it's the web site's address. If it's an IRCer, it's the address that they appear on IRC as. Unless your entire resnet is NAT'd, CIS probably knows exactly who the attacks are after.

      They [people who do DDoS attacks] generally aren't sophisticated enough to try and hide the target (by attacking the entire /24, for example) to hide their target. And besides, if you can get the ISP annoyed at your target for bringing down an attack on them, they may do your dirty work for you and take it down themselves.

  8. The Other-Other Operation by centauri · · Score: 5, Funny

    "That's a nice StarCraft server you have set up there. Be a shame if anything happened to it."

    Honestly, that's what I thought when I read "extortion" and "online gaming."

    --
    Don't blame me, I voted for Durga.
  9. For anyone who remembers by Eberlin · · Score: 1

    The threat of MS-DOS is enough to blackmail me out of most anything.

    On a more serious note, what's up with Denial of Service attacks anyway? I guess I'm not informed enough to really offer a technical solution -- but on the client side, DDOS attacks are made with zombie bots/machines...which means an army of unpatched boxen. It's one thing to get yourself flooded out of IRC by some "crew" but a completely different thing to have major sites get killed because of an exploit infecting thousands of machines which should have been patched months ago.

    Then again, maybe it's a new bit of revenue for the OSDN folks -- subscribe or your site shall know the power of a good slashdotting. :)

    1. Re:For anyone who remembers by SilentT · · Score: 1
      On a more serious note, what's up with Denial of Service attacks anyway? I guess I'm not informed enough to really offer a technical solution -- but on the client side, DDOS attacks are made with zombie bots/machines...which means an army of unpatched boxen. It's one thing to get yourself flooded out of IRC by some "crew" but a completely different thing to have major sites get killed because of an exploit infecting thousands of machines which should have been patched months ago.

      Yeah, Windows users are really terrible about keeping their boxes secure. I'm just proud that, as part of the open source community, my box never causes any problems for other people's servers.

      /sarcasm

    2. Re:For anyone who remembers by Anonymous Coward · · Score: 0

      1) I didn't single out windows users as I'm sure unix boxen are rooted and used as zombies too. Stupidity is platform-agnostic.

      2) You seem to have completely disregarded the other paragraph about a slashdotting.

    3. Re:For anyone who remembers by Anonymous Coward · · Score: 0

      Stop trying to get technical and stick to your rhymes rapboy.

  10. Comment removed by account_deleted · · Score: 2, Insightful

    Comment removed based on user account deletion

  11. well by Fiddy+Cent · · Score: 2, Insightful

    Sooner or later they're gonna try to extort the wrong people, and then Luca Brasi shows up at their doorstep.

    1. Re:well by Anonymous Coward · · Score: 0

      Luca Brasi sleeps with the fishes

  12. DANGER WILL ROBINSON, DANGER by to_kallon · · Score: 0, Redundant

    Instead of using a few machines, the extortion gangs control hundreds of thousands
    with all those computers "they" could bring down the internet! OH NOES!

    --


    The only way to get rid of a temptation is to yield to it.
    -Oscar Wilde
  13. DDoS Extortion? by Pan+T.+Hose · · Score: 1, Funny

    You mean so many extortion attempts at the same time that the law enforcement is unable to track them all and the victims are unable to pay so fast?

    --
    Sincerely,
    Pan Tarhei Hosé, PhD.
    "Homo sum et cogito ergo odi profanum vulgus et libido."
  14. Prolexic Technologies by Flabasha · · Score: 3, Informative

    Apparently, Prolexic Technologies is the company that's providing the DDoS Solution.

    1. Re:Prolexic Technologies by 99BottlesOfBeerInMyF · · Score: 1

      Hmm, they don't look too useful to me. They provide detection and advice as a service to help you withstand attacks and identify the source. Given that the source is usually a zombie army distributed across the globe, how does this help? Do you think that law enforcement can address the sources in a reasonable timeframe? This seems to be a service oriented company, that may provide useful advice, but does not seem to address the real problem, protecting the routing infrastructure that provides access to your services, and ensuring that normal, operational traffic is not interrupted. Look to service providers to begin offering DDoS protection as a feature, after integrating appropriate hardware solutions in their routing architectures. Several providers have announced these services, and limited trials are going on with many of them.

    2. Re:Prolexic Technologies by Anonymous Coward · · Score: 0

      I'm one of their clients. They have a huge, huge, absurdly powerful network that can withstand very huge attacks. They have a lot of hardware filtering going on so your sites will be accessible even if you are experiencing a DDoS attack. That in itself is useful to me.

    3. Re:Prolexic Technologies by ggvaidya · · Score: 1

      Hmmmm ... we could try slashdotting them, see if they're any good :).

    4. Re:Prolexic Technologies by 99BottlesOfBeerInMyF · · Score: 1

      Perhaps I was a little harsh. I did not mean to imply that the service was not useful, only that it is not a reasonable and scalable solution in the long term. Consolidating everyone's network to run through fewer large, robust networks, with filtering just makes larger grained targets. Soon, most ISPs will provide some level of DDoS protection, and DDoS attackers will have to become sneakier.

  15. mirroring content on Slashdot = more 503 errors by Anonymous Coward · · Score: 0
    Plus, mirroring content on Slashdot means that there's no chance for a webmaster to do a bait-and-switch with goatse or something like that.

    Are you kidding? Nobody'd ever see Slashdot again. Imagine the bandwidth bills if Slashdot had to handle the slashdotting for every story, even if they could serve that type of volume, which seems doubtful!

  16. DDOS and 2nd and 3rd world countries by Monkelectric · · Score: 5, Interesting
    Criminials in 2nd and 3rd world countries *LOVE* the internet because it gives them *ACCESS* to first world country victims. If a russian guy can steal 100$, thats less then a days pay for me, but 6 months salary to him.

    I don't have the link anymore, but MSNBC did a writeup on my mother who some russian jerkoffs tried to extort. They basically got her with a fish page, we caught on and shut down her accounts. Then they sent threats saying unless we sent money they would this and that, then when that didn't work they sent messages *BEGGING* for us to send them 150$ claiming they were poor and destitute and it was nothing to us.

    --

    Religion is a gateway psychosis. -- Dave Foley

    1. Re:DDOS and 2nd and 3rd world countries by Anonymous Coward · · Score: 0

      Why would someone flaimbit this. Reading a first person account of a DDOS issue is more informative.

      The internet has brought a bunch of countries together, in which everyone can now share ideas, information and do pretty much anything together. Along the same lines we are now sharing the same problems, crime included.

    2. Re:DDOS and 2nd and 3rd world countries by Anonymous Coward · · Score: 0

      You have a point, but claiming that $100 is 6 months salary to a Russian shows your ignorance. That MIGHT pay the month's rent in a small town for a small apartment, but that's all.

    3. Re:DDOS and 2nd and 3rd world countries by Anonymous Coward · · Score: 0

      someone said something to the effect that third world countries are filled with people who think that americans are wealthy (true relative to third world countries) and see them as an opportunity to cash in (not entirely true). Not even most people in third world countries are that naive and nasty. Another person implied that maybe we should monitor third world internet access....hmmm there's a thought....don't you think first world netizens would do better to spend their time and money educating residents on the dangers of using the internet rather than trying to cut off the pipe to third world countries.

    4. Re:DDOS and 2nd and 3rd world countries by jprior2001 · · Score: 1

      2nd world was the soviet block/warsaw pact states. In case you missed it, the soviet union fell. Therefore, no more 2nd world. That is a very antiquate way to look at the world. The book, The Pentagon's New Map gives a great new view. Basically you have the world connected through commerce and the web. Then there those part of the wolrd that are not connected or that people in those place want to keep dis-connected (see much of the mid-east).

    5. Re:DDOS and 2nd and 3rd world countries by mindstrm · · Score: 1

      Interestingly enough:

      most of these attacks are a 2nd world country attacking a 3rd world one. Most internet gambling is in the 3rd world.

      the attackers are in Russia, so 2nd world.

      The only part that is 1st world are the Zombies (and the customers of the gambling businesses)

  17. IP Spoof Filtering... by Autonin · · Score: 5, Interesting

    I agree - Null Routes aren't the answer here. But something that ISP's *can* do, and could have done all along but have yet to, is to incorporate anti-spoofing measures in their networks.

    It's a fairly simple concept, but a lot of work to do it with routers. Every customer end-point should have ACL's on them that block any traffic coming out of their segment that isn't assigned to their IP space. This keeps end-points honest, regardless of what IP's they try to use, which also makes zombie isolation a lot easier. They have to use their own IP, or at least a valid IP on their network, just to affect the target they are trying to attack.

    Apparently this is such a Herculean effort, however, that no ISP's I know of do this consistantly. There's really no upside for them anyway, except for a warm fuzzy that they're contributing to the health of the Internet.

    Maybe if these sort of extortion schemes happen enough, proper pressure can be brought to bear on the ISP's to do this.

    --
    -AutoNiN
    1. Re:IP Spoof Filtering... by fredrated · · Score: 0

      How would this affect 'legitimate' spoofing?

      I consult with an ASP and they often need to send out emails in the name of their customers. They are worried that spoof-blocking will make them less able to meet their customers needs.

      FredRated

    2. Re:IP Spoof Filtering... by Anonymous Coward · · Score: 0

      Define "customer end-point".

      At some point though all the routes from the "customer end-points" you mentioned gets passed up to another router that has several other "end-points" going to it and it has to keep track of each of the valid IP ranges from all the others that go to it and so on and so on as the traffic passes from one ISP to another.

      It's a great thought, but when you get to some of the core routers you are going to add a lot of stress to the processors. Not to mention the global aspect of the internet. As there is no "boss-of-the-internet" there's no way to centralize the effort.

    3. Re:IP Spoof Filtering... by radish · · Score: 1

      This is about IP spoofing, not email spoofing.

      --

      ---- Den ene knappen er powerknapp, den andre er Bender voice knapp "Bite My Shiny Metal Ass"

    4. Re:IP Spoof Filtering... by dnoyeb · · Score: 2, Insightful

      Zombies don't spoof.

    5. Re:IP Spoof Filtering... by Anonymous Coward · · Score: 0

      The easier way to prevent 1918 address space from traversing a network is to null route those addresses. It is relatively easy to inject them into your routing table using your IGP.

    6. Re:IP Spoof Filtering... by AndroidCat · · Score: 1
      They might. I've wondered if a persistant zombie port-scanner is using asymetric routing to spray packets out from zombies and catch only the responses at other IP addresses. That way (a) they don't expose the IPs of zombie machines, (b) the "bullet-proof" spoofed addresses don't have as much traffic. Maybe not.

      One port scan claimed to be coming from 10.163.112.154. I don't think so.

      --
      One line blog. I hear that they're called Twitters now.
    7. Re:IP Spoof Filtering... by Florian+Weimer · · Score: 1

      I agree - Null Routes aren't the answer here. But something that ISP's *can* do, and could have done all along but have yet to, is to incorporate anti-spoofing measures in their networks.

      A lot of attacks come from completely legitimate sources. Some malware reads the local subnet address and subnet mask and spoofs from that range, revealing the origin of the packets. Other attacks are higher up in the protocol stack and require (among other things) a complete TCP handshake, so spoofing is no longer possible.

      Nowadays, attackers have so many machines that they just don't care about revealing their real addresses anymore. You can't block tens of thousands of IP addresses efficiently, either.

      In some cases, anti-spoofing filters do help, but I doubt that they would make a huge difference on the current network, even if they were universally deployed.

      There's no magic solution for the DoS problem. Even plugging a Cisco Guard blade into every other Cisco router won't solve the problem (short-term mitigation is certainly possible, though).

    8. Re:IP Spoof Filtering... by dorsten · · Score: 1

      so you mean like..

      (config) access-list 1 permit (ip for network + block mask)
      (config) access-list 1 deny any

      then enabling it for outgoing traffic on the proper interface would do the trick? (on cisco routers)

    9. Re:IP Spoof Filtering... by halbritt · · Score: 1

      That's not it. It's more like


      interface foo
      ip verify unicast source reachable-via any allow-self-ping


      Also, like others have said, zombies usually don't spoof.

    10. Re:IP Spoof Filtering... by Mysticalfruit · · Score: 1

      Here's an idea.

      We watch the incoming traffic. If we see X number of hits over Y period (usually 5 seconds) we drop all the traffic from them for a 1/2 hour. After a half our if we're their still sending, they get put on a 24hr block list.

      what you could go is write a program that would do this on a linux box that would have an out of band connection to the router at the head of the network and configure the acls to drop the IP at that level. Granted this isn't going to get any of your bandwidth back, but it'll give you a good list of IP's.

      --
      Yes Francis, the world has gone crazy.
    11. Re:IP Spoof Filtering... by Cramer · · Score: 1

      It's anctually even easier than that...

      interface FastEthernet0/0 ...
      ip verify unicast source reachable-via ...

      Cisco started RPF (reverse path forwarding) a number of years ago. It uses the CEF (Cisco Express Forwarding) table's FIB (Forwarding Information Base) to know if the packet came from where it should've. Since this is within the packet's normal switching path, the check is practically free.

      [See Also: Configuring Unicast Reverse Path Forwarding]

      (As others have stated, this will not stop a DDoS as they aren't spoofed.)

    12. Re:IP Spoof Filtering... by Florian+Weimer · · Score: 1

      So... can you split up IP addresses into multiple paths to go through multiple filters?

      You need additional devices for this because large routers can not efficiently base forwarding decisions on source addresses. There are load balancers which can do this, but you are probably better off if you directly install a working (!) anti-DoS device instead.

      Another option is MPLS-based traffic shunting, but it only works in MPLS networks. You still need at least one specialized anti-DoS device, but you don't have to install one of them close to each of your border routers.

  18. Not knowledgable on topic but... by Psychotext · · Score: 2

    ...aren't there firewalls that can handle this yet? Ok, so you probably can't stop it initially but surely we have equipment capable of detecting which clients are hitting the site in an abnormal manner and ignoring their traffic - at least in the short term (Hours / Days).

    That should realistically mean that whilst you might lose the site for half an hour you shouldn't be losing it for days at a time. Anything like this exist? I would have thought that the bigger gambling sites would be all over it by now.

    --
    People that believe in their opinions don't post AC.
    1. Re:Not knowledgable on topic but... by radish · · Score: 2, Informative

      The problem is that the bad traffic still has to get to your firewall, so your inbound bandwidth is still all used up. A DDoS isn't usually about overloading the app server, it's about saturating all your connections.

      --

      ---- Den ene knappen er powerknapp, den andre er Bender voice knapp "Bite My Shiny Metal Ass"

    2. Re:Not knowledgable on topic but... by Psychotext · · Score: 1

      Ok, thanks - Was unaware of that.

      --
      People that believe in their opinions don't post AC.
    3. Re:Not knowledgable on topic but... by Autonin · · Score: 4, Informative

      There's a couple of problems with handling the issue on the victim-side. Generally, a DDOS attack is a flood of packets with spoofed IP's (thus my eariler comment). This makes back-tracking or attacker isolation next to impossible to do. And since most attackers aren't following RFC 3514 (http://slashdot.org/articles/03/04/01/133217.shtm l) the firewall can't inherently detect which packets are 'naughty' and which packets are 'nice'.

      Firewalls sometimes deal with connection overload by proxying the TCP three-way handshake and only allowing the completed handshakes through to the end server. Under attack, however, the firewalls themselves can have these connection queues saturated and then they begin selectively dropping a percentage of the connection requests. Since it can't tell valid from hostile, real users experience connectivity issues.

      For UDP-based protocols, used by many real-time online games, there's simply no way to stem the flood other than drop packets above a certain threshold, also causing a partial DOS for valid users.

      All of these measures also cannot address the bandwidth consumption issue. This can *only* be addressed upstream.

      With IP spoof protection in place at end points where hostiles live, or at gateways to foreign networks, we can at least keep attackers to real IP's that we can then isolate and prosecute.

      --
      -AutoNiN
    4. Re:Not knowledgable on topic but... by jaywee · · Score: 1

      The problem is that DDoS is inherent to the Internet network design - simple network flow issue. So we can't unfortunately get rid of DDoS attacks unless we somehow redesign Internet as a whole (maybe more intelligent routers?), which won't be exactly easy thing to do ...

    5. Re:Not knowledgable on topic but... by Deorus · · Score: 1

      > ...aren't there firewalls that can handle this yet?

      Once upon a time (when I was an IRC user), I used to run a little forum in which people could post random stupod IRC quotes. Apparently someone got so mad about one of the quotes that they decided to hit me to death, so they distributed a worm which would simply resolve my domain and send me really huge fragmented UDP packets whose effect blocked my whole inbound traffic. I repeatedly asked my ISP to apply some QoS and lower the priority of that traffic, but they said they couldn't do anything about it. Then I realized that the worm was targeting my domain so I simply added a wildcard to resolve a CNAME to www.microsoft.com and registered another domain. A day later the traffic was gone (guess who had to deal with it)...

    6. Re:Not knowledgable on topic but... by Drantin · · Score: 3, Funny

      if only they would follow the rfc specifying the evil bit...

      --
      Actio personalis moritur cum persona. (Dead men don't sue)
    7. Re:Not knowledgable on topic but... by Kazrath · · Score: 0

      From my understand DDoS attacks keep leaving open connection and starting new ones. The router then looks for the connection and another is made. Basically 1 machine is causing multiple open connections. When you multiply this by thousands or more it becomes more than the hardware can keep up with. It then crashes. Kinda like hitting the redline on RPM's on your engine. Then BOOM engine fails.

    8. Re:Not knowledgable on topic but... by Cramer · · Score: 1

      TCP Intercepts have a high-water mark where uncompleted connections are reaped. For Cisco IOS and PixOS, those thresholds are configurable -- and they work if you can stand the volume of packets.

      You honestly expect to prosecute 10,000 hacked windows box owners? (I'd contribute to that legal fund :-))

  19. Clarify by Kallahar · · Score: 5, Informative

    Just to clarify for everyone, this is extortion against online *gambling* companies, not online gaming.

    You can call gambling "gaming" in the offline world, but not the online -- "online gaming" is already taken :)

    1. Re:Clarify by ahem · · Score: 1

      I hear a faint echo in the room. "Hacker"..."Cracker"..."hacker"..."cracker"..."hac ..."..."crac..."......

      --
      Not A Sig
    2. Re:Clarify by mindstrm · · Score: 0, Troll

      Says who?

      Onling gambling has always been called "Online Gaming"... just like it's meatspace counterpart.

      That's what the stock market calls it, that's what business calls it, and that's waht the entire industry calls itself...

  20. Sounds like he learned a lot while in IRC... by Juvenall · · Score: 2, Interesting

    From the article
    But that's good for his new business, Prolexic Technologies Inc., which is based in Hollywood, Fla. His sting operation for BetCRIS produced a dozen clients. Prolexic is on track to bring in $2 million this year.

    "Pay us and we'll save you from DDoS". Where have I heard that before?

    I really can't be the only one who finds it hypocritical he's starting his own protection racket, can I?

    1. Re:Sounds like he learned a lot while in IRC... by Anonymous Coward · · Score: 2, Insightful
      I really can't be the only one who finds it hypocritical he's starting his own protection racket, can I?

      How is it a protection racket?

      Comparing a security company which helps defend against DDOS attacks to the DDOS attackers themselves is like comparing a security guard whom you hire to guard your business to the local gang who shake you down for "fire insurance".

      Yes, both are getting paid to prevent harm to your livelihood. But the DDOS attackers and the gang are the ones threatning that livelihood in the first place. There is absolutely no moral equivalence here.

    2. Re:Sounds like he learned a lot while in IRC... by PitaBred · · Score: 2, Informative

      It's an anti-protection 'racket' though. He learned a lot from his troubles, and is now starting a business with what he learned in order to help other people who may not have the same skills or opportunities. For a fee.
      Sounds pretty much like standard capitalism to me... perhaps you're one of those people who thinks that everything should be free.
      In short, yes, you are the only one who thinks it's hypocritical.

    3. Re:Sounds like he learned a lot while in IRC... by Anonymous Coward · · Score: 0

      "Pay us and we'll save you from DOS". Where have I heard that before?"

      Microsoft, when you upgraded to a system based on windows NT

    4. Re:Sounds like he learned a lot while in IRC... by Anonymous Coward · · Score: 0

      You're paying for them to keep your sites running while attacks are going on. Most providers, even the likes of RackSpace, will nullroute you until the attack dies down enough for them to handle. This is crucial to gambling sites where they really, really need constant uptime to make their $$$.

    5. Re:Sounds like he learned a lot while in IRC... by Anonymous Coward · · Score: 0

      I was surprised to read halfway through the thread to come to a comment like this.

      When I was saw the headline on slashdot and read the article, my first thought was- Oh great.. some stupid slashdot zealots will question why such an article was written in the first place and why is a company making money helping clients mitigate ddos attacks. According to idiots like you, they consultants should provide their services for free. Gee.. you know that ain't going to happen.

      What a juvenile.

  21. Re:Worldpay and Paypal, that hurt bad by eln · · Score: 4, Insightful

    Your friends are obviously not real e-commerce people. Everyone who has ever worked in tech support knows that all businesses lose millions of dollars a second every time anything related to their Internet service goes down.

  22. Re:I'm sure YOU'D know about it, huh, michael? by Anonymous Coward · · Score: 0
    Would it be that hard to email site owners a few hours in advance before each story runs?

    That's where the extortion part comes in - want advance warning of a slashdotting? Better subscribe...

  23. This is the reason why we cant get world peace. by jellomizer · · Score: 4, Insightful

    When ever we make someting available to the general public there is a matter of time until some jirk finds a way to cause problems. The internet has been around for about 30 years and has been popular for about 10 years. So after this short time we have turned a means of comunication ( And what a lot of people think as a step to peace ) into a complete war zone. And because no one directly (Indirectly some one may) gets hurt, and it is a lot harder to track someone down, they will attack sites and ingage in Mob beheavior much more esially then in real life. So a person who is on the outside will seem like an ordanry citizan when on the internet becomes a massive crime lord extrorting thousands of dollars from companies. They should bring back public flogging as a form of punishment, it seems a suitable punishment for a criminal who comits his crime in anonmity.

    --
    If something is so important that you feel the need to post it on the internet... It probably isn't that important.
    1. Re:This is the reason why we cant get world peace. by hopemafia · · Score: 0

      Forget flogging, chop off a finger for each offense...I'd like to see them hack without fingers.

      --
      If God had had a computer it would have taken him 7 months to create the earth...if he even bothered to do it at all.
    2. Re:This is the reason why we cant get world peace. by JeanBaptiste · · Score: 1

      " it seems a suitable punishment for a criminal who comits his crime in anonmity. "

      heh, I get all your points, and agree... just thought the above quote was a little funny, cause if you didn't commit your crimes in anonimity, you'd probably get caught.

    3. Re:This is the reason why we cant get world peace. by digitalsushi · · Score: 0

      into a complete war zone.

      The Internet works almost every single day for me. I can't remember my last outage. Some day someone will attack my infrastructure and take it down for a while. And when it comes back up, I would be upset if I learned I too started calling the Internet a complete war zone.

      --
      slashdot: where everyone yells sarcastic metaphors to themselves to understand the issue
    4. Re:This is the reason why we cant get world peace. by jhagler · · Score: 3, Informative

      Yep, it's commonly referred to as the tragedy of the commons and the Internet is a perfect example.

      --
      Never underestimate the power of human stupidity -RAH
    5. Re:This is the reason why we cant get world peace. by RajivSLK · · Score: 2, Interesting

      They should bring back public flogging as a form of punishment

      Yes, but instead of being held in the town square we'll setup a webcam and webcast it around the world.

  24. Time for a 'retrovirus' ? by MaineCoon · · Score: 4, Interesting

    As much as I hate to suggest it, it seems like underground vigilantism may be the only way to deal with the problem currently.

    It seems like we are approaching a time when the need for friendly "retroviruses" that patch/disinfect (or at least warn the user and attempt to disable invasive services) is more critical to the internet's survival than before, given law enforcement's general inability to deal with the problem (not that it is really their fault, but it is beyond their capabilities).

    At a minimum, "retroviruses" that can find and identify compromised zombie systems and report them, would be useful to build reports for ISPs of infected customers, and allow them to deal with the problem. Unfortunately, most of the infected PCs are probably in countries where people don't care or can't really deal with the problem anyways (can't afford anti-virus software or are running pirated versions of Windows that they can't patch.

    The only other alternative I can come up with is infrastructure changes to identify incoming attack addresses at a router, automatically report them to their source (or to something up stream), and implement blocking at that end. But that's talking expensive hardware...

    --
    Hunt your preferred prey at Aliens vs Predator MUD. Join the war at avpmud.com port 4000
    1. Re:Time for a 'retrovirus' ? by BitwiseX · · Score: 0

      Interesting thought.. \"(or at least warn the user and attempt to disable invasive services)\" I wouldn't warn the user, just SILENTLY patch/disinfect. They are just going to think scam if you "warn" them via email popup etc.

    2. Re:Time for a 'retrovirus' ? by Croaker · · Score: 4, Interesting

      Actually, there might be an easier way to take down zombie networks than creating a roaming virus... As I understand it, most zombie networks take their marching orders by watching an IRC channel on some server someplace. If you can figure out where the channel is, and can manage to compromise it, you should be able to hijack the zombie network and make it patch itself and then uninstall the viruses.

      Instead of polluting the net even more with "retrovirus" traffic, this would be a surgical strike, although timing would be critical. I assume they shift IRC servers and channels fairly frequently, and the IRC servers might be well hardened.

    3. Re:Time for a 'retrovirus' ? by Anonymous Coward · · Score: 0

      It is easy enough to implement a key system to where the bots will only accept orders from only one person and not anyone else. This type of counter attack will only work for so long before zombies become more immune

    4. Re:Time for a 'retrovirus' ? by Psychotext · · Score: 1

      Of course, given the fact that these machines were hacked in the first place it shouldn't be too difficult to run an automated vulnerability scanner against them all and take them out one by one (and for good).

      Not so nice, but you'll find users learn their lessons when some asshole deletes their operating system / personal files.

      --
      People that believe in their opinions don't post AC.
    5. Re:Time for a 'retrovirus' ? by Anonymous Coward · · Score: 0

      You might learn your lesson when your 400 pound gorilla cellmate holds you down and makes you his bitch, too. Then again, you might be too stupid to make the connection.

    6. Re:Time for a 'retrovirus' ? by Psychotext · · Score: 1

      Thankfully I live in a country that has the common sense to keep different grade criminals apart from each other. :)

      --
      People that believe in their opinions don't post AC.
  25. I'm not a very good network admin by scribblej · · Score: 5, Interesting

    Or at least, I like to think I'm not very good. There's so much to know, and I only know a tiny part of it.

    My boss keeps coming to me with printouts of articles just like this one. Then he likes to say, "What can we do to prevent this happening to us?"

    I like to respond, "Nothing."

    But it's never a satisfying response. What do the slashdot network gurus do to prevent DDoS attacks on their systems?

    I would suggest the standard netowrk security tips - close off any ports that aren't needed, etc --

    I would suggest a null route, but that only helps against a known attacking IP address. A DDoS comes from many IP addresses.

    I woudl suggest blocking (or null routing) them ALL, but then the DDoS attacker will just go buy another set of zombie PCs and renew the attack. You can't win that one.

    I would suggest getting a service provider with more bandwidth, but then the attacker will just get an equivalent number of more zombie PCs to attack from.

    I would suggest a fancy setup with multiple servers at multiple Colos but then the DDoSer will just launch multiple attacks.

    Is there any way to win?

    Is there any way I can tell my boss something other than "nothing?"

    Save me Slashdot! Pleeeeease!?

    1. Re:I'm not a very good network admin by Anonymous Coward · · Score: 0
      1. make sure you have plenty of anal lube
      2. bend over (BOHICA)
      3. place one hand on each ass cheek
      4. spread ass cheeks
      5. have boss apply anal lube (#1 above)
      6. let the DDOS begin!
    2. Re:I'm not a very good network admin by Anonymous Coward · · Score: 3, Interesting

      To quote WarGames:
      Strange game, The only way to win is to not play.

    3. Re:I'm not a very good network admin by emidln · · Score: 0

      I woudl suggest blocking (or null routing) them ALL, but then the DDoS attacker will just go buy another set of zombie PCs and renew the attack. You can't win that one. Yes you can. Keeping a counter on hits from a particular IP isn't difficult and can be done efficiently. When it reaches a certain amount in a specified time range, blacklist the IP for a random amount of time. This deals with customers being denied access (if they are sending out packets at 100% bandwidth utilization then they aren't using their pc now or in the immediate future anyway). This also effectively prevents a DDoS when combined with spoof protection. With the backing of ISPs using anti-spoofing filtering, this could effectively eliminate a DDoS.

    4. Re:I'm not a very good network admin by Anonymous Coward · · Score: 0

      I've seen somewhat smaller websites handle a (probably weak) ddos attack by doing two of the things you suggested, getting multiple servers and a bigger pipe. It's expensive I'm sure, but it might be the only way for most of us. It's more brute force defense, than sophisticated.

      If my website ever came under a ddos I would probably just deny world permissions and wait it out (seems like a funny "solution" since that's what the attackers would want in the first place). However I don't make any money on my site. If my site was a source of revenue, I would probably just fold and go with the expensive option.

      If you're a ddos attacker and you attack a site, I really doubt it's very satisfying if you only managed to make the target spend more money to vastly improve the sites performance. Also don't forget they have a cost associated with making the attack as well, and your solution scales a hell of a lot better than theirs does.

    5. Re:I'm not a very good network admin by scribblej · · Score: 1

      Well, that sounds nice in theory. How do you accomplish it in practice?

      You can point me at some link if there's some description elsewhere on the net...

    6. Re:I'm not a very good network admin by Anonymous Coward · · Score: 1, Informative

      The war games quote was (for the most part) a joke, if you're seriously worried about being DDOSed the *best* solution is to get a backup DSL line (from a different provider), and be ready to switch your outbound routing as needed. If you truly need to have your website up 24/7 then you'll also want to have the ability to switch your DNS info over to the dsl line, but honestly. 9 times out of 10, all you (the net admin) need to be able to guarantee is that productivity is not hurt, and as long as you have a backup outbound connection you should be fine. Or at least it'll get your boss off your ass.

      Generally speaking, DDOS attacks aren't random. They specificly target people, so you should know if you're at risk. However, it's always good to have a backup dsl line for outbound (and select inbound) traffic. Especially if you have the sort of luck most of us admins have ;-)

    7. Re:I'm not a very good network admin by halbritt · · Score: 1

      I am a network engineer for a large ISP. When people ask me what we can do to prevent DDoS attacks I say the same thing. We've got pretty large pipes, so attacks of a couple hundred megs don't really affect any customers other than the intended. Even still, the only thing we can do is respond to the attack once it occurs.

      The only effective prevention tool that I know of is available from a company called Arbor Networks. Unfortunately, the tools are very expensive and not really applicable for the individual user.

    8. Re:I'm not a very good network admin by WhatAmIDoingHere · · Score: 1

      Although he is slightly a douche bag, read about what Steve Gibson () did when his site was attacked. It's pretty interesting.

      --
      Not a Twitter sockpuppet... but I wish I was.
    9. Re:I'm not a very good network admin by SillyNickName4me · · Score: 1

      Other then throwing even more servers and bandwidth at it? no.

    10. Re:I'm not a very good network admin by scribblej · · Score: 1

      I suppose that's a good point I hadn't thought of; as unsatisfying as it would be to me to say, "I bought more bandwidth so I'm winning for now," it'd probably be even LESS satisfying to the attacker.

      I wish there were something more though. :/

    11. Re:I'm not a very good network admin by Anonymous Coward · · Score: 0

      I sure fucked that link up.

    12. Re:I'm not a very good network admin by kent_eh · · Score: 1
      The best solution (other than some well aimed ass-kicking) is to disable the zombies.

      That's not to say it is the easiest solution. It will take massive effort on the part of every geek out there.

      *warning; hippy-esque feel good plan follows*

      What we really need to do (yeah us techies) is to educate users that their home computer is probably doing bad stuff without their knowledge. Then we show them how to stop it, or offer to help them clean up their machines.

      All users. Not just the ones we are "responsible" for at work.
      -The folks you play pickup basketball with.
      -Your distant (and close) relatives.
      -People at your $place_of_worship.
      -Old folks at the seniors center.


      Everyone.



      Until the zombies are offline for good, there's no permanent way to stop these kind of attacks.

      --

      ---
      "I can't complain, but sometimes still do..." Joe Walsh
    13. Re:I'm not a very good network admin by maja33 · · Score: 1

      Yes, you did :) I think you wanted this: DDos attacks on GRC.com

      --
      "It wasn't me, I didn't do it, I don't post, the bite marks still haven't healed from last time." Ryan/jrc
    14. Re:I'm not a very good network admin by scribblej · · Score: 2, Funny

      Awesome. The next time my boss asks me what we can do to prevent DDoS attacks, I know what I'll tell him now.

      "Start a grassroots campaign!"

      That'll get me promoted, no doubt.

    15. Re:I'm not a very good network admin by mpcooke3 · · Score: 1

      Talk to your ISP with your boss about what their process is for dealing with DDOS attacks.

      Then after that meeting suggest to your boss that he could investigate taking out an insurance policy to cover business losses while your ISP filters traffic.

      Matt.

    16. Re:I'm not a very good network admin by mindstrm · · Score: 1

      You filter and sanitize the traffic at a point in the network where you have the resources to do so.

      For small operations, where it would cost too much to lay out your own huge network, you go with companies like Prolexic, mentioned in the article.

      Let's be clear about one thing though.. this depends on your business. Online sports gambling businesses, especially smaller ones, can be hurt severely if they are forced offline for even a few key days of play. If customers can't bet on a game, they WILL go to a competitor, that money is lost. It's not like online shopping where they can just come back a day later and buy the same thing.

      Due to the extremely high cost of downtime at key times, these extortionists could afford to throw serious resources at their targets. The likelyhood of someone sustaining a multi-gigabit attack for several days with 20,000 hosts or more against some little business website is unlikely.

      Attacks can't go on forever, the longer they run, the easier it is to track down the perpetrators. Unless your downtime is that valuable, you are not likely to be a long term target.

      So.. without knowing what business your are in, all I can say is put it all in perspective for your boss. The cost of downtime, the impact, how much money they are willing to spend to prevent downtime, etc. For a few grand a month, you could likely have some first class protection for your web traffic.

    17. Re:I'm not a very good network admin by Anonymous Coward · · Score: 0

      I've met steve in person several times.
      I cannot deny that he's a bit eccentric but he does not in any way deserve the term you used.

    18. Re:I'm not a very good network admin by WhatAmIDoingHere · · Score: 1

      He believes himself to be the savior of the intarwebnet.com..

      And he puts off an air of "I'm a complete douche" with his comments about warning Microsoft of security flaws in their products.

      It's just how he talks.

      --
      Not a Twitter sockpuppet... but I wish I was.
    19. Re:I'm not a very good network admin by Anonymous Coward · · Score: 0

      That was 4 or 5 years ago. But I was surprised that he bothered tilting at the microsoft windmill. I think most people just assume that windows is full of security flaws and move on. FWIW, GRC's flagship product now boots from freedos so perhaps he also has moved on.

    20. Re:I'm not a very good network admin by WhatAmIDoingHere · · Score: 1

      4 or 5 years ago?

      He was gloating all over his main page about how MS finally fixed the problems he pointed out with some fixes from the SP2 beta testing period.

      --
      Not a Twitter sockpuppet... but I wish I was.
    21. Re:I'm not a very good network admin by Minupla · · Score: 1

      Me? I hired the guys in this article. They're good.

      The problem with DDOS attacks is that if they get far enough into your network that you can do anything about it, you've lost.

      Consider. The company I work for has seen up to a 6 Gig-bit attack. If your pipe isn't on that scale don't even consider trying to fight it yourself. The only solution is to send the traffic somewhere else. Prolexic has a BIG pipe, multiple teir 1 providers, etc.

      --
      On the whole, I find that I prefer Slashdot posts to twitter ones because I don't get limited to 140 chars before
    22. Re:I'm not a very good network admin by bedessen · · Score: 1

      There's nothing you as an individual company / organization can really do, for all the reasons you've listed.

      However, if there was a concerted effort among ISPs to implement proper filtering of packets, then at least DDoS attacks that used spoofed sources would be impacted. This can't solve all types of attacks, and it requires significant cooperation and motivation because currently there is little incentive to do so. Basically you configure your border routers not to pass packets that you know are invalid -- those with RFC1918 addresses, bogon addresses, and addresses outside of your AS. This is all documented in BCP38.

      So basically, tell your boss that to prevent attacks like this you can have him mandate that whatever company you decide to buy connectivity from must implement BCP38. If ISPs have an actual incentive to do this, instead of just a bunch of grey-bearded admins saying it would be a good idea, then perhaps it would be implemented more widely. Essentially, tell him to make his purchasing decisions based on "good network stewardship" and not just lowest price. If more companies did this then as a whole the DDoS landscape would clean up just a little bit.

      There was recently a long thread on nanog about this. It's good reading as it shows from the operator side of the fence how the situation is known to be improveable but there's no financial (and thus managerial) reason to do it.

  26. Why not just block the method of communication? by hrieke · · Score: 2

    So most of these bots use IRC to get their marching orders- so why not disrupt that method of communication?
    This can be done on the ISP level, or at a personal level by blocking ports or what have you- or even by DDoS'ng known IRC servers themselves (a taste of their own meds?).

    Just a thought

    --
    III.IIVIVIXIIVIVIIIVVIIIIXVIIIXIIIIIIIIVIIIIVVIIIV IIVIIIIIIVIII...
    1. Re:Why not just block the method of communication? by BitwiseX · · Score: 0

      \"or even by DDoS'ng known IRC servers themselves\" It's not Dalnet's fault anymore than it's the fault of the person's zombied PC. Don't shoot the (packet) messenger! Let's just all start DDoSing each other! It'll be like a TCP/IP Food Fight!

    2. Re:Why not just block the method of communication? by Anonymous Coward · · Score: 0

      An ISP blocking IRC would really upset people who use it for legit means. [Sidebar: are there any legit users of IRC left?]

      If you tried to target the specific channel, you'd have to know the bots were there so you could go in and see where they were reporting to. That's ok for some individuals who want to track how things are done, but if you know the bot is there, why not just shut it down while you are there?

    3. Re:Why not just block the method of communication? by wizkid · · Score: 1

      There's also the backup irc channels. If I wrote a bot, I'd set it up so that if it couldn't talk to the primary channel, it would switch to the secondary. I loose an IRC channel, I update my bots with a new primary and secondary (or more) backup channels. These thieving bastards aren't going to loose there networks over an IRC server.

      --
      I take no responsibility for what I say. Even though I'm never wrong :)
    4. Re:Why not just block the method of communication? by bruns · · Score: 4, Insightful

      Yes, there are legit IRC users left. Its my primary method of communication with the people who host services on my equipment, or to coordinate upgrades, or whatever we need to do that requires real time communication.

      To attack IRC servers just because thats the place where the bots go, is assanine and illegal. Some servers have 5000+ users on them, and the people who own/run those servers have enough problems as it is dealing with attacks from packet monkeys.

      How would you like it if I DDoS'd your server because one of your users sent out spam? You'd probably be screaming bloody murder to the FBI about it.

      Unless you are willing to allow other people to do the same things you want do to them at the exact same levels, don't even suggest that attacks are a way of dealing with a problem.

      --
      Brielle
  27. exactly by bani · · Score: 2, Informative

    for some reason people in many 2nd and 3rd world countries are raised on propaganda (often from their government) believing that every single american is a millionaire.

    1. Re:exactly by Monkelectric · · Score: 1, Insightful

      Oh they are actually -- and thats the reason for a lot of the animosity towards us right now (in addition to our screwups as of late). They are grown up being told we are this wealthy and technologically advanced country (true and true) and that if we *WANTED* to we could solve the problems of their country easily (not true), and it is only because we are too selfish (half true) and too busy with our luxury to notice their suffering (not true) to beset upon them with our benevolence.

      --

      Religion is a gateway psychosis. -- Dave Foley

    2. Re:exactly by bani · · Score: 1

      well you also get shit like iranian mullahs telling their people that theres government operated brothels in every american city and that americans still own slaves.

      nigerian criminals justify their scams today because of slavery hundreds of years ago. or because it's ok to rip off christians because "they're persecuting muslims".

      and that if we *WANTED* to we could solve the problems of their country easily (not true), and it is only because we are too selfish (half true) and too busy with our luxury to notice their suffering (not true) to beset upon them with our benevolence.

      and of course then they complain about american interference...

    3. Re:exactly by Anonymous Coward · · Score: 0

      Well, when I was in Mexico I didn't haggle over prices much. I figured even if they were charging me 5x what a local paid it was still a huge bargain and the money meant more to them than to me.

    4. Re:exactly by mindstrm · · Score: 1

      Can you cite some sources?

      Compared to people in these countries, Americans ARE very wealthy.

    5. Re:exactly by Monkelectric · · Score: 1

      Compared to people in these countries, Americans ARE very wealthy. SOME americans are very welathy. I only have to drive a couple miles from my house to see desolate desperate people in my own TOWN I don't have the power to help.

      --

      Religion is a gateway psychosis. -- Dave Foley

    6. Re:exactly by mindstrm · · Score: 1

      Yes, everywhere has it's poor people.

      That doesn't change the fact: the average american has way more money and opportunity and privelege than the average 3rd world person.

      As for not having the power to help.. who took away your powers? Anyone can help if they put their mind to it.

    7. Re:exactly by /dev/trash · · Score: 1

      Well who wouldn't. The current trend out of some poilitcians is that only the rich got a tax break. I'm not bragging or anything but 17k a year is not rich and I got a tax break.

    8. Re:exactly by Monkelectric · · Score: 1
      As for not having the power to help.. who took away your powers? Anyone can help if they put their mind to it.

      I'd like to challenge this myth :) I give people who I deem to be "legit" bums money (which the probably spend on alcohol), I voulenteer and am assisting a poor blind guy on behalf of a church (and I'm a fu***** atheist), but you know what, even if I gave them everything I had it still wouldn't change the fact that Im up here and they're down there. Yes I can help in *little* ways, but help in the way they need? Getting their lives back on track? It's too big a job for one person :)

      --

      Religion is a gateway psychosis. -- Dave Foley

  28. Re:Firewalls are useless against DDoS by Anonymous Coward · · Score: 1, Informative

    These attacks work by consuming all your bandwidth, and possibly all your service provider's bandwidth as well. A firewall will prevent the packets from flooding your internal LAN, but won't help the internet connection one bit. If it were an attack that used a flaw in the system, such as a winnuke attack, then a firewall would help but firewalls are useless against bandwidth consumption attacks like these DDoS attacks.

  29. My Draconian Solution by DelawareBoy · · Score: 1

    Hold the people with the unpatched boxes responsible for the attack. Especially if a patch has been made available. If not, blame Microsoft.

    1. Re:My Draconian Solution by m2bord · · Score: 1

      oh..screw it...just blame microsoft.

      why?

      because installing their patches is like a round of russian roulette.

      sometimes the patch works perfectly on install, sometimes it brings down the whole system, sometimes it does something else that's worse...like force you to fdisk and start over.

      i haven't installed sp2 because i know five people who have installed it and three have had bad experiences and two have had positive experiences.

      so...i wait until there's more info on how to fix the problems...meantime, i have an unpatched machine guarded only by zone-alarm and my common sense (which obviously isn't that great because i'm still using ms).

      if ms made these patches better and safer (which i'm not even sure if that's possible), we probably wouldn't be having this discussion.

      --
      Is it 5:30 yet?
    2. Re:My Draconian Solution by Kazrath · · Score: 0

      What does that solve? Placing blame does absolutly nothing. Never has never will. Things need to be fixed. People need to be educated. There is a website i've seen it.. British i think. Anyway it has the "Internet Drivers License" Honestly I think this is a good idea.

    3. Re:My Draconian Solution by Anonymous Coward · · Score: 0

      Microsoft thanks you for allocating blame to it, and hopes your servers are restored to full working condition as soon as possible.

      We'd like you to know we're working on MS-AntiDOS[tm] right now, and will be releasing it sometime after Longhorn and before the heat death of the Universe.

      Thank you,
      Your Local Friendly Microserf

    4. Re:My Draconian Solution by Anonymous Coward · · Score: 0
      Um...how about hold the attacker responsible. Dumbass.

      That's like saying we should hold the passengers of the plane responsible for 9/11 - if they didn't book that flight, it wouldn't have taken off.

      God I hate closed-minded, tunnel-vision Linux geeks.

    5. Re:My Draconian Solution by CdnYoda · · Score: 1

      Better yet...format C: Install Linux LiveCD, etc. ;-)

      --
      -- "May the Source be with you!"
  30. Money laundering services by Animats · · Score: 5, Informative
    Extortion scams like that require a money laundering service to process the payments. e-Gold is apparently popular.

    Another is WebMoney, mentioned on the spammer board SpamForum.biz. It's a anonymous money transfer service in Moscow. Elaborate crypto. Special downloaded applications. Schemes for transferring money between customers, and finally out into the banking system. Accounts can be in euros, dollars, rubles, or hryvnias. Address is supposedly 71 Sadovnicheskaya Street, Moscow, Russia, 115035. Same address as the "Three Monkeys", which is a gay nightclub.

    There are a number of services like this. They come and go. There's Gold-Cash, in Latvia. There's EvoCash, at an undisclosed "offshore" location. (Well, there was EvoCash; they ceased operations on October 19th.) They even have a trade association, which rates services as "Platinum", "Gold", "Silver", "Copper", "Carbon", or "Chlorine", which gives a hint of the problems in this area.

    Then there are brokers who transfer money between these services. These can be used to perform the "rinse cycle" in money laundering. But that's another story.

    1. Re:Money laundering services by Impotent_Emperor · · Score: 1

      Perhaps a counter DDoS against the money sites would be a good idea. The extortion email arrives and gives the information for the payment method, then DDoS that company. Tell the extorter that you sent the money, but they won't be able to check their account while the DDoS continues.

      Will it be effective and stop DDoSes? No. But it will hurt some assholes and I think that's worth it.

  31. Re:Worldpay and Paypal, that hurt bad by aputerguy · · Score: 1, Insightful

    Everyone who has ever worked in tech support knows that all businesses lose millions of dollars a second every time anything related to their Internet service goes down. Millions of dollars a second??? A bit of an exxageration... Actually losses are always less than the hype since you need to think about losses in net contribution dollars (not gross revenues) and also consider only true lost (vs. deferred sales). Outages both planned and unplanned are an unfortunate fact of life. One tries to minimize them when at all possible but the losses are typically manageable and are for better or worse part of the cost of doing business on the Internet.

  32. I wish by Anonymous Coward · · Score: 0

    Man I wish someone would DDOS this site... That way people might turn to kuro5hin which in my opinion is a much better and not ran by nerds with penis envy who have to have their little kingdom to control.....

  33. DDoS Heart Attack by Grokko · · Score: 2, Interesting

    If one were to know the irc channel that a DDoSer uses to communicate with the zombie machines, is it possible to spam the channel with commands that will physically shut down the zombies, like a poweroff command in Linux, thus mitigating the effect?

    It could be a Denial of Denial of Service Attack, or DoDos. I confess I might be simplifying the issue too much.

    In this case, you'd have to:

    1. Identify a DDoS is in progress.
    2. Pick one of the zombie IP addresses.
    3. Identify the type of DDoS it is performing, by trying all known ones (if it is out there in quantity, it is likely known).
    4. Find it's IRC channel and spam it with poweroff commands.
    5. DDoS stops happening.

    1. Re:DDoS Heart Attack by OzzyRulez · · Score: 1

      You gotta find the network before the channel, and it's not that hard to run your own network, especially when the only users are zombies. If you knew the network, you'd simply need to get it shutdown.

    2. Re:DDoS Heart Attack by Cramer · · Score: 1

      Nah. Take over the channel. set "+v" and sit back and enjoy the silence. He won't be able to command the bots if he cannot speak to them.

      Of course, he could do the same. And he'd still see all the bots entering and leaving the channel...

  34. I laugh at the ignorance.... by The+Foo · · Score: 0

    *caugh* script kiddies *caugh*

    --
    http://www.macinhack.com
  35. 3rd world scams 1st world ONLINE by Anonymous Coward · · Score: 0
    Oh they are actually -- and thats the reason for a lot of the animosity towards us right now (in addition to our screwups as of late). They are grown up being told we are this wealthy and technologically advanced country (true and true) and that if we *WANTED* to we could solve the problems of their country easily (not true), and it is only because we are too selfish (half true) and too busy with our luxury to notice their suffering (not true) to beset upon them with our benevolence

    hey, i've been in the third world. it doesn't matter if you're a millionaire or whatever, if you're from the first world, you are a TARGET FOR their desires for MONEY. I've heard of third world neighborly families KIDNAPPING each other's kids FOR MONEY. ANY person in the third world who has computer access is a potential scammer online. That's why it's so dangerous now. If the third world can be in DIRECT ACCESS to the first and second world nations, then all of us in the first world are vulnerable to their nastiness. I've told friends and relatives to NOT DO BUSINESS ONLINE ANYMORE AND NOT PUT THEIR PERSONAL/FINANCIAL INFO ONTO THEIR COMPUTERS WHICH IS SILLY (as we never had to do that before and you'd think YOUR computer is yours to do with as you will) BUT IT IS NECESSARY NOW. I've had one friend of a friend phished already and advising him how to handle his keylogger and securing his personal/financial info and computer.

  36. start by reading the artical by Anonymous Coward · · Score: 0

    One of the guys getting attacked got fed up, and started a company to deal with this. Contact him for help. Part of what he is doing is pretending to be one of these guys, getting their confidence and collecting evidence. Then he forwards that info to the police. You should be helping him out.

    1. Re:start by reading the artical by scribblej · · Score: 1

      I did read the article. I don't think hanging out on IRC in hopes of getting the dirt on some skript-kiddies is a plan that I can give to my boss with any confidence.

      If it comes up, though, I'll be glad to "help that guy out" or better yet to report the skript kiddies to the authorities myself. I can schmooze on IRC as well as the next guy.

      (Never mind that on IRC "the next guy" is probably a 40-year old pervert with no social skills living in his mother's basement.)

  37. random figures stated as fact - film at 11... by cliveholloway · · Score: 5, Informative

    Pull your head out of your ass and check before you state a wild guess as a fact:

    "The average Russian salary is about $245 a month, but most state sector workers earn only a little more than a half of that."

    So an average Russian earns $1470 in 6 months. Well, you were only out by a factor of 15 - source.

    You don't have anything to do with elections in Florida by any chance?

    cLive ;-)

    --
    -- Trinity in high heels carrying a whip: The donimatrix - there is no spoonerism
    1. Re:random figures stated as fact - film at 11... by Monkelectric · · Score: 1

      No, I dont know the average wage in russia, and no that doesn't make what I said any less true.

      --

      Religion is a gateway psychosis. -- Dave Foley

    2. Re:random figures stated as fact - film at 11... by contemplation1 · · Score: 1

      Reminds me of the big lebowski scene at the end of the movie with the 'nihilists'.. "Without a hostage there's no ransom! Those are the rules!" "Our girlfriend cut off her toe!" "We thought we would get a million dollars! It's not fair!" (...No Donny, there's nothing to worry about, these men are cowards.) anyway. those people deserve to get smashed in the stomach with bowling balls and their ears bit off by John Goodman.

    3. Re:random figures stated as fact - film at 11... by Anonymous Coward · · Score: 0

      Christ dude, relax. The rest of us aren't checking his math and don't give a shit anyway. No matter what the amount is it still isn't very much.

  38. Null routing vs intelligent DDoS defense by twigles · · Score: 4, Informative

    Null routes are indeed a terrible way to defend against DDoS attacks. ISPs nowadays are investing up to millions of dollars in *intelligent* defenses. These are mostly anomaly-based Network Intrusion Detection Systems (NIDS) from companies like Riverhead Networks, Top Layer and Vsecure Technologies sometimes referred to as "attack mitigators". Instead of a full-fledged NIDS like Snort, these systems focus primarily on DDoS attacks, and while I haven't used one professionally I have spoken with several people who have (old-school, cynical networking/unix guys) and they say that they are very good at not blocking innocent traffic.

    Basically they look for anomolies like the rate of traffic hitting a specific site, then they start to look for patterns in the traffic (source IP, packet size, packet interval, page requested, etc.). From there the detection boxes inform a second machine that "scrubs" the traffic, in other words drops all nefarious stuff. Some of these guys sit inline (inline=the packets must physically pass through them as light/electricity) or sit off the path, but send BGP Updates to the routers passing these packets. The BGP Update technique is interesting because it allows the normal routers to send traffic destined to the IP under attack through the scrubber because the router has a very specific route to that machine, while the rest of the subnet is routed normally. Anyone familiar with BGP knows that you advertise the biggest supernet possible (/20, /22...) so this is nice in that it leaves your other stuff alone.

    I'm sure some products use null routing at the end of this process, but it isn't some geek sitting at a keyboard typing in IPs. It's intelligent automation (at least one product actually checks to see if its remedy fixed the problem, and if it didn't it undoes the fix). I can tell you for a fact that AT&T is deploying a bunch of these attack mitigators (Riverhead - now part of Cisco) in their routing core.

    As for writing an Apache module or taking steps on the actual target web site ... the success of those will always be limited by the fact that they can only reduce the load somewhat, and a bandwidth exhaustion attack won't care if your site requires a login.

    1. Re:Null routing vs intelligent DDoS defense by Anonymous Coward · · Score: 1, Informative

      I think someone was at NANOG last week.

      http://www.nanog.org/mtg-0410/pdf/battles.pdf

    2. Re:Null routing vs intelligent DDoS defense by Anonymous Coward · · Score: 1, Interesting

      Null routes aren't completely bad if the attack is by IP as opposed to a DNS name. So, for example, setting TTLs on A records for the attacked DNS name to something like 5 minutes will enable you to Null route the attacked IP, update DNS with the new A record and then be back up. Obviously, if the zombies routinely do DNS lookups for the host this solution doesn't quite work. But, I can assure you that after working for a company that was routinely attacked (they would fill a 100Mb pipe) this worked quite well -- we weren't e-commerce. We did talk with Mazu, but that solution was way too expensize for us...especially during a period of IT downsizing.

      Ultimately TCP/IP needs to be updated to have something like ANI in the telco system. I can remember before ANI there were no concerns doing war dialing. Once it came out....everyone got a little timid.

      Also, from my experience spoofed IP attacks really aren't as common. With zombies...they don't really care because they know tracing all of them will be a severe headache.

    3. Re:Null routing vs intelligent DDoS defense by twigles · · Score: 1

      I don't know wth nanog is, but from that slideshow I wish I *was* there. It sounded right up my alley. And since my contract at AT&T is not being renewed due to their horrific financial condition I think I could have networked a little.

  39. Solution by Anonymous Coward · · Score: 2, Interesting

    1) Log zombie IP.
    2) Expoit zombie using the same exploit used to 'zombify' it in the first place.
    3) Patch zombie machine.
    4) Repeat.

    Is this feasible?

    1. Re:Solution by LurkerXXX · · Score: 1

      Someone who exploits a machine will often patch it against that exploit so no one else can take it over. They keep their own trojan/application running that they use to remotely control it, but seal off the original route of infection.

  40. Bah! by daishin · · Score: 2, Funny

    Theres always DDOS extortion attempts on IRC, like this case...

    <h4ckrr> gimme opz or i fl00d u!
    <Daishi> no
    *h4ckrr has quit (Ping timeout)

    --
    (\_/)
    (O.o) This is Bunny. Add Bunny to your signature
    (> <) to help him achieve world domination.
  41. When will Microsoft be held responsible? by Anonymous Coward · · Score: 0

    Face it, 99.9% of the computers participating in these attacks are running Windows.

    They're the computers of the average computer-user who has a spyware of some type running on his/her system and is doing this without the user's knowledge, but the fact remains:

    Microsoft's defective products are behind this, supporting terrorism.

    When will Microsoft be stopped?

  42. Why not? by phorm · · Score: 1

    For centralized servers like battle.net that would be very possible. Not quite so for games like battlefield wherein the server daemons are available to the public.

  43. These kids need a role model by Anonymous Coward · · Score: 0

    Any asshole can spew packets to take down a server. You don't know the first thing about owning a box... you need a role model!

    [shamelessly lifted from Gone in 60 seconds]

  44. My Regime... by Greyfox · · Score: 3, Funny
    My regime would require an "internet license" which would be a card with a magstripe. The magstripe would contain your crypto key (passphrase required to unlock yadda yadda.) All computers would be outfitted with magstripe readers and to access the net you'd have to insert your license. All traffic from you would be signed with said license. Border routers would validate licenses and reject unsigned traffic.

    First license would be free if you can pass the multiple-choice test. If it's revoked, you have to take a class and pay $50 to have it reinstated. Reasons for revocation would include, among other things, having your system compromised and used to attack other systems. That'd take care of all those zombie systems in one easy step. Having your Internet license revoked more than three times would be grounds for revoking your breeding license (Which will have somewhat more stringent entry requirements to begin with.)

    Other countries which my regime has not yet assimilated will not be left out. They can either adopt my policies or have their traffic signed by a generic key when it enters my country. Of course, if the generic key gets revoked, everyone using it will be out of luck...

    --

    I'm trying to teach myself to set people on fire with my mind... Is it hot in here?

    1. Re:My Regime... by the_weasel · · Score: 4, Funny

      My regime plans to overthrow your regime using rhetoric and innuendo, and replace it with a mildly anarchistic commune run by warlords and charismatic pop idols. Then we will declare your supporters as non-humans, and hunt you through the streets.

      I intend to make this country profitable by selling the right to watch the country on television to countries like Russia and China. This effectively combines their dislike of Americans with their youths addiction to our media.

      Just kidding. :->

      --
      - sarcasm is just one more service we offer -
    2. Re:My Regime... by Anonymous Coward · · Score: 0

      so now i have to pay the government for hte privilege to access a PRIVATELY run network of computers.

      interesting.

    3. Re:My Regime... by Greyfox · · Score: 1
      Yeah. Technically my regime is fascist. But it tries to be a mostly-beneovelent dictatorship (Except for the impalings...) I think that most people would be better off than they are now. Or at least they'd say so if you asked them. Otherwise we'd impale them. I'm kidding, I'm kidding!

      Anyway, like I said, the first license would be free. And hell, if you can prove that you practised good security (Did routine updates, didn't run Outlook, etc) and STILL got pwned, well then we'd even consider waiving the fee to get your license reinstanted. We want to be fair about it and all...

      Oh and by the way, you're already paying the government to access a privately run network. Check your phone bill sometime. The government fees should be running you about $6 a month.

      --

      I'm trying to teach myself to set people on fire with my mind... Is it hot in here?

    4. Re:My Regime... by MyHair · · Score: 1

      Oh shit, I'm moving to Canada now...

  45. Easy Solution by Anonymous Coward · · Score: 0

    How many Russian sites or people do you actually communicate with? Blacklist Russia!

    1. Re:Easy Solution by elambi · · Score: 2, Insightful

      Unfortunately Lativa is not in Russia.

      --
      Sig, we don't need no stinking Sig!
    2. Re:Easy Solution by Anonymous Coward · · Score: 0

      They were referred to as "The Russian Gang" several times.

      as late-night conversations turned social, he let slip his real first name -- Ivan -- and that he was a 21-year-old college student in Russia.

      Armed with the results from the money trail and Lyon's information, the British authorities went to the Russian Interior Ministry and suggested several arrests, including that of Maksakov, who lived in Saratov. In late July, police picked him up, along with a 23-year-old St. Petersburg man and a 24-year-old in Stavropol. Two other suspects are being sought.

    3. Re:Easy Solution by emmenjay · · Score: 1

      You won't eliminate all zombies, but you'll get the great majority.

    4. Re:Easy Solution by elambi · · Score: 1

      Later in the story :

      "One of the first British firms to be targeted, CanBet Ltd., had turned to the Hi-Tech Crime Unit in the fall and agreed to send traceable money to a list of names in Latvia provided by the extortionists. The unit sent a team to watch the pickup spots, along with local police, and the crew was alarmed to see the Latvians pick up cash sent by other businesses around the world."

      My point was that it wasn't just Russians.

      --
      Sig, we don't need no stinking Sig!
  46. Re:Worldpay and Paypal, that hurt bad by Anonymous Coward · · Score: 0

    The question is, what happens when this becomes more widespread? Especially considering that more and more reliance is starting to be put on e-commerce.

    There are ways of coping with this. Unfortunately, they aren't cheap. Check out Riverhead, who developed a nifty DDoS prevention architecture (they're not the first, mind you), and as long as you have enough bandwidth available, it's VERY effective. One of my largest customers has dual GigE to their datacentre to provide enough bandwidth, and the Riverhead stuff 'filters' out the crap, only sending legitimate traffic to internal web/database servers. They're NEVER down.

  47. How about an RBL? by phorm · · Score: 2

    There can only be so many zombies out there. Sure, the number is growing, but one can probably pick them out of a crowd over time. Why not have an RBL for zombies... when X clients to the RBL report getting hit by the same zombie (before getting swamped, or after the DDOS finishes), add it to the RBL. Then perhaps we could start thinking about routering off IPs listed in the RBL, subnet blacklisting when a DDOS starts, or other countermeasures.

    Cutting an infected machine off from the net entirely isn't such a bad option... having an infected machine spewing out spam and DDOS is similar to an HIV patient in a bordello...

  48. It's kind of ironic... by adiposity · · Score: 2, Insightful

    Back when SCO was claiming they were being DDoSed, many experts made claims that resulted in stories like the following:

    The debate touches on more subjects than we could possibly cover here, but experts are claiming that SCO could have taken countless preventative measures to stop the attack affecting their services.

    (see here)

    Groklaw had a bunch of "experts" claiming it was easily stopped, as well, and suggested it was faked by SCO.

    The truth is, as people here have pointed out, that it really doesn't matter what preventative action you take; if your pipe is full, your pipe is full, even if you drop all the packets when they hit your routers.

    You can't easily beat a bandwidth saturating attack.

    -Dan

  49. Static IPs by heri0n · · Score: 1

    I know this is not really feasible right now, but couldn't we just assign everyone in the world with a static IP? And have those websites only accept connections from specified IPs?

    1. Re:Static IPs by Anonymous Coward · · Score: 0

      There wouldn't be enough IPs to go around.

      That's why NAT is so popular.

      And anyway, think about dial-ups, their IP pool is much smaller than the number of subscribers they have but as large as their number of phone lines.

  50. Comment removed by account_deleted · · Score: 1

    Comment removed based on user account deletion

  51. Comment removed by account_deleted · · Score: 1

    Comment removed based on user account deletion

  52. Re:Worldpay and Paypal, that hurt bad by brain007 · · Score: 0

    Billy Gates must have been the one to mark the parent as insightful. A million a second for an online operation would be a tad over 31.5 trillian dollars. I certainly hope this was meant to be funny...

    Actually, what am I saying? Hire me as an accountant there! I promise your books will be straight.

  53. Authorize.Net is getting HAMMERED by JohnnyGTO · · Score: 3, Interesting

    Our CC processing company is getting HAMMERED again today with a DDOS. Now how am I going to process those fraudulant Nigerian orders?

    --
    Si vis pacem, para bellum! For evil to succeed good men need only do nothing!
    1. Re:Authorize.Net is getting HAMMERED by sevinkey · · Score: 3, Interesting

      I work for a credit card processor, and DDOS is now the norm for us. Everyday. Fortunately it only took a couple of days to get the system completely stable while accepting daily DDOS attacks as the norm.

    2. Re:Authorize.Net is getting HAMMERED by JohnnyGTO · · Score: 1

      Well u might want to see if they have any openings to head up their IT dept. cause this is the 2 or 3rd time this quarter.
      ,br>

      --
      Si vis pacem, para bellum! For evil to succeed good men need only do nothing!
    3. Re:Authorize.Net is getting HAMMERED by sevinkey · · Score: 1

      Don't know if I'd want to go work for them! Something tells me having billing stop once a month isn't too good for company longevity! :D

  54. there's a legal precedent... by zogger · · Score: 1

    ..that hasn't been used yet against zombies. In meatspace it's called "maintaining an attractive nuisance". You don't get a get out of it with a free pass card by claiming stupid or "you didn't know", it's just tough charlie for you.. Lots of precedent out there.

    I think if a major site/corporation just said ENOUGH OF THIS and did in fact go and file suit against the people behind all the IPs that attack them in a DDoS attack, just MAYBE it might wake up a few clueless users to maintain their machines better, and then MAYBE the lawsuit pain would spread upstream to the vendor (yes, them guys) where it belongs and MAYBE it might make the news so that even more people take a more serious and proactive stance with their boxes and security.

    I see no reason to keep allowing billionaires to get richer over extremely easy to compromise no warranty "products" they lease out to use. And I also see no reason not to require adults to maintain their machines or their minors machines in proper working order on the net. It's this "well it isn't my fault" idea that has spread, none of this is ever anyones fault, it's just this vague "hackers" fault, where said hackers couldn't do near as much without the millions of "attractive nuisances" out there that are easy pickings.

    1. Re:there's a legal precedent... by ahdeoz · · Score: 1

      Do you propose suing the owner of a vehicle for leaving the keys in it if it gets stolen and used as a getaway car for a bank robbery?

  55. Viruses by iamlucky13 · · Score: 1

    You sure it's not coming from viruses? If your campus is anything like ours, probably 1/3 of the students will still not have patched the LSASS vulnerability that's been known about for over 4 months. Computers then infected with Sasser or Korgo will happily spew out packets to random IP's whenever they have a connection. We've been trying to educate and entice students to run windows update, but they play dumb (Some, on being told have actually said "We shouldn't have to be computer wizzes to use the internet"). I'm almost ready to lobby for requiring all students to have comp services set windows update to automatic for them unless they can pass a test showing they can use a computer safely and responsibly before we let the DHCP server hand them a real IP.

    1. Re:Viruses by screwdriver · · Score: 1


      Some, on being told have actually said "We shouldn't have to be computer wizzes to use the internet"

      Yeah, and you don't have to be an auto mechanic to drive a car either, but you do have to know about some basic maintenence. Running windows update is MUCH easier than performing an oil change or tire rotation so what's the problem? The problem is that a new car usually costs in excess of $10,000 whereas a new Dell might only cost $400 or so. With a car, disregarding routine maintenence might cost them several thousand dollars in repairs, whereas with a computer a sympethetic geek and a case of beer is all that is all they need. If computer repairs costed as much as car repairs, you can bet the students would change their attitude.

      Also, if a car has a defective safty/warning device (eg. a burned out tail light) the driver will be issued a citation, but nothing happens to someone who fails to update their virus protection or run Windows update. Bottom line is, if it costs them they will listen, if not then you might as well have your conversation with the wall.

  56. 4 things to do... bad to good order by jrl · · Score: 1

    1) Go out of business
    Obviously not ideal.

    2) Pay the extortion fee
    Short term solution... long term disaster.

    3) Buy lots of bandwidth and beefier equipment that can handle a large number of packets per second and a large number of concurrent connections. This is where you will also want to invest in a DDoS mitigation box like the toplayer etc devices.

    This is a costly and time consuming way to go, and you will still have limits of what you can handle. A 100mb/s attack will kill a 10mb/s pipe every time, even with a $1,000,000 attack mitigator in front =).

    4) Partner with a DDoS protection service like Prolexic. My company, Dyad Security - http://www.dyadsecurity.com/s_cleanpipe.html is a US reseller for the Prolexic DDoS protection service.

    We have the infrastructure in place to eat the attack and keep you online. If you're offline, we can bring you back up very quickly (anywhere from 1-24 hours to get back online).

    1. Re:4 things to do... bad to good order by scribblej · · Score: 2

      Tell me (and the rest of Slashdot) a little more about how your service works. I work for an ecommerce provider with some money to throw at the problem, if you really can make it go away. I tend to think in technical terms, though, so you won't make a sale here unless I really end up feeling like I understand how you can help.

    2. Re:4 things to do... bad to good order by jrl · · Score: 1

      If you're down, call us - (800) 644-DYAD.

      If you just want to talk tech, you can reach me at (949) 394-2033.

    3. Re:4 things to do... bad to good order by FrankHaynes · · Score: 1

      If you're down, call us - (800) 644-DYAD.

      What if his phone service uses Voice over IP and his connection is being flooded?

      --
      slashdot: A failed experiment.
    4. Re:4 things to do... bad to good order by Minupla · · Score: 1

      For what it's worth the company I work for is a direct customer of prolexic. They're worth the look, they got us out of a few jams.

      *disclaimer: I do not work for Prolexic, but I do work for one of their early customers*

      --
      On the whole, I find that I prefer Slashdot posts to twitter ones because I don't get limited to 140 chars before
  57. WHAT!? I can't HEAR you by Anonymous Coward · · Score: 0

    OK, I get THE point. YOU CAN STOP ABUSING YOUR SHIFT KEY NOW.

    Your REPLY looks LIKE a NIGERIAN scam LETTER.

  58. Re:Worldpay and Paypal, that hurt bad by AK+Marc · · Score: 1

    Billy Gates must have been the one to mark the parent as insightful. A million a second for an online operation would be a tad over 31.5 trillian dollars. I certainly hope this was meant to be funny...

    It is insightful. Why? Because it gives insight into the stupidity of businesses that have Internet connections. Having worked in telecom for a while, one invariably finds people that pay the cheapest amount for a home DSL account, then call in wanting thousands because they accidently shut off their router, so the Internet was down. After all, they are running a business with their home DSL account with the dynamic IP (and no, they have no idea about any of the DNS tricks for those with dynamic IPs).

    Or, to make it simple:
    People are stupid. Now give me my +1 insightful.

  59. Readable colours by Anonymous Coward · · Score: 0
  60. Parent is spot on :) by Animaether · · Score: 1

    I was thinking it, hoping to see it - shame it's only score:1

  61. So the question is: by dark-br · · Score: 1


    Who the Cyber-Godfathers are?

  62. Sarcasm by Anonymous Coward · · Score: 0

    You missed the implicit [sarcasm] tags around "millions of dollars a second."

  63. Geez, what a coincidence! by Gentlewhisper · · Score: 1

    My webhost got taken out yesterday too!

    Hope it is not due to this new sig I added on /.!

  64. Rush Limbaugh Coordinates Denial of Service Attack by tomwhore · · Score: 2, Informative

    The amazing Trevor Blake posted this fine news up to http://www.amsam.org/ recently..

    Rush Limbaugh Coordinates Denial of Service Attack

    Transcripts from Rush Limbaugh's own Web site from his show confirm that he coordinated a Denial of Service attack on a third party's Web site. This is a crime punishable by up to 5-10 years incarceration, according to one source[1]. The victim of this attack has elected to
    not seek legal compensation, but that does not make the attack any
    less illegal.

    Rush Limbaugh, September 28, 2004:[2] "Let's shut this website down,
    folks. Shall we? [...] I don't often suggest this kind of thing, but
    this could be fun here. [...] And, you know, we've shut down the
    server, folks. That's why you can't get through. Don't tell me the
    address is wrong, that's what happens when you ask about five million
    people to go to the same website at once, you shut it down, that was
    the objective here. We want them to get all excited and say wow, our
    website is taking off. Essentially in the computer world what we've
    created here is a DOS, a denial of service attack, so many people
    trying to get in at one time."

    Rush Limbaugh, September 30, 2004:[3] "And so when I heard about this
    I thought we'd have a little fun with it. [...] I said, 'Let's go shut
    'em down, folks,' meaning not put 'em out of business, but let's just
    flood them with activity knowing full well that that's always gonna
    happen when I give a web address here and suggest people go look at
    it. There are simply too many millions of people here, and this is
    obviously a small website. Shut it down for awhile. "

    [1] http://www.seifried.org/security/network/20020305- ddosfaq.html#3.0
    [2] http://www.rushlimbaugh.com/home/daily/site_092804 /content/cutting_edge.guest.html
    [3] http://www.rushlimbaugh.com/home/daily/site_093004 /content/cutting_edge.guest.html

    --
    Poor little clams! Snap! Snap! Snap! Poor little clams! Snap! Snap! Snap! Poor little clams! Snap! Snap! Snap!
  65. Being on the receiving end of many of these.. by mindstrm · · Score: 1

    in the multi-gigabit range, let me dispel some misconceptions.

    IN practice, DDOS attacks on a large scale nowadays are NOT ip spoofed at all, the source addresses are almost always real.

    What you are saying about DDOS applied 5 years ago, but is now quite out of date. SYN proxying is more efficient, yes, but it will still have problems.

    Further, most DDOS nowadays simply massively saturates the available bandwidth to a site.

    Most hostile zombie machines are already in networks with spoof protction. Cable modem users, universities, etc.

  66. Better way to limit traffic by JohnBaleshiski · · Score: 1

    A better way is to use iptables to limit the amount a traffic an IP is allowed. For example:

    iptables -A FORWARD -p tcp --syn -m limit --limit 1/s -J ACCEPT
    iptables -A FORWARD -p tcp --tcp-flags SYN,ACK,FIN,RST RST -m limit --limit 1/s -J ACCEPT
    iptables -A FORWARD -p icmp --icmp-type echo-requist -m limit --limit 1/s -J ACCEPT
    iptables -A INPUT -p all -m limit --limit 1000/hour --limit-burst 1000

    This would work for all incoming ports, not just apache. Having small pages is not going to help. Throwing more hardware at the problem is a bandaid.

  67. Weird 0wn3d computers! Wonder what they run. by SysKoll · · Score: 1
    From the article: [T]he extortion gangs control hundreds of thousands, often the personal computers of people with high-speed DSL lines or cable modems. Most of the PCs were compromised with a series of worms and viruses that began appearing last summer. They spread most easily to machines without firewalls and automated patching from security companies.

    Alas, the article doesn't give you a clue about what OS these mysterious PC are running. They are easily 0wnable, they are trojaned and zombified to death. I wonder what they run? BSD? Geez, PCDOS 3.3 maybe?

    Of course not. They all run Windows. I'll even go further and bet that they run IE or Outlook, the most effective Trojan and virus vectors ever.

    Yet nobody is suggesting that MS might have some responsability in the $90 million losses mentioned in the article. Everybody is comfortably numb accepting IE in computing the way you have to accept gravitation in physics.

    Well, sorry, but IE and Outlook are just programs, not a religion. People can change if you push them hard enough to overcome their natural inertia. What we need is a bit of, well, push.

    And we have the motivation to pay for it, all right. NINETY MILLIONS losses, the article said. For one case. At this price, financial companies all over the world might save themselves a bundle if they start requiring non-IE browsers and non-Outlook mail clients, actively enforcing it at their web site. Imagine getting the following popup at your bank web site when Joe Q Fartbrain logs on:

    "WARNING: IE detected. You clueless moron, you are running IE for your online banking! I cannot believe it! As we speak, your password has probably been keylogged a dozen times and is used by a Russian drug addict mobster to siphon off your account! Gay pedophiles are buying hamsters and duct tape with your credit card and sending pictures to your mom from your AOL account! Do mankind a favor and burn off your PC now! And STAY OFF THE NET until you get a clue, you twit!"

    Now, wouldn't that be a better prevention than the usual useless generalities about ID theft that you see on bank web sites these days?

    --

    --
    Mad science! Robots! Underwear! Cute girls! Full comic online! http://www.girlgeniusonline.com/

    1. Re:Weird 0wn3d computers! Wonder what they run. by Ahnteis · · Score: 1

      Don't be so incredibly stupid.
      Any linux box run by these type of users would be compromised at the same speed. Computers are NOT to a point where the average person can make them secure.

    2. Re:Weird 0wn3d computers! Wonder what they run. by SysKoll · · Score: 1
      Thank you for your gratuitous insult. I'm glad to see that you totally missed the humor attempt and focused only on your pet theory.

      To compound things, on top of being uselessly rude, you're wrong. Computers *are* at a point where you can reasonably expect a machine not to get infected by spyware and keyloggers after simply visiting a page.

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      Mad science! Robots! Underwear! Cute girls! Full comic online! http://www.girlgeniusonline.com/

  68. Insoluble problem by FrankHaynes · · Score: 1

    What we really need to do (yeah us techies) is to educate users that their home computer is probably doing bad stuff without their knowledge. Then we show them how to stop it, or offer to help them clean up their machines.

    Unfortunately, this sounds good, but does not work.

    I did some work for money at a guy's house. He had just moved into this roommate situation, was doing real estate work and I set up his wireless access point and installed some software on his laptop and other minor configuration. Easy for me, he was satisfied, and his machine was safe and secure the way I left it.

    While there, he asked me to look at his roommate's computer because "it wasn't working right". It was running Windows 98 on a DSL connection and he had just bought Norton Anti-Virus and tried to install it. I never could get it to complete the install and run through multiple attempts, even with Symantec's so-called support. It was likely a conflict with other software, but where does that endeavor end?

    Mind you, I was doing this Win98 work for free because it almost certainly had loads of spyware and other malware on this machine and I was trying to help the Net, but the guy simply couldn't be bothered. He uninstalled the Norton package and is reading his AOL e-mail with a totally unprotected Win98 computer. No anti-virus. No firewall. No incentive or desire to change this situation. I couldn't make a career out of his one computer, having spent several hours on it already.

    He gets this tortured look on his face and exclaims how he "just doesn't understand computers, so leave it alone, thank you very much!"

    Multiply this case by the number of non-technical computer users out there whose machines are hooked to cable modems or DSL connections and you can see why this problem will likely never go away without significant structural changes in the Internet or its next incarnation.

    Sad, but true.

    --
    slashdot: A failed experiment.
    1. Re:Insoluble problem by Anonymous Coward · · Score: 0

      Could ISPs do something? Monitor for an unusually large number of their users contacting a particular site, and start disconnecting users. Or Stopping them from viewing that site for a period of time. If the users complain the ISP can then say "Patch your system". This should make it impossible for this kind of attack to occur.

    2. Re:Insoluble problem by kent_eh · · Score: 1


      Unfortunately, this sounds good, but does not work.


      Yeah, I know. I never said my plan was a good plan, or particularly practical, just that it was feel-good.

      A guy can dream, can't he?

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      "I can't complain, but sometimes still do..." Joe Walsh
  69. ISP's ? by Anonymous Coward · · Score: 0

    this " ' " is used in English to express POSSESSION (genitive case?), it is NOT a plural. So it should be ISPs. Right? Bye.

    Lameness filter encountered. Post aborted!
    Reason: Too much repetition.

    1. Re:ISP's ? by blueskies · · Score: 1
      this " ' " is used in English to express POSSESSION (genitive case?), it is NOT a plural. So it should be ISPs. Right?
      Agreed. I would have thought this was picky but it's done so many times.

      ISP's...ACL's...IP's... ISP's... ISP's

      5/10 for use of the " ' "

      If you get any worse you should not use it at all and you will be correct more of the time!
  70. There is a simple solution! by emmenjay · · Score: 1
    or at least a partial solution.

    DDOS attacks are generally conducted using zombie PCs. How do we reduce the availability of zombies?
    1. Make ISPs legally liable for criminal acts performed by zombies on their networks.
    2. ISPs will then start regularly scanning their networks for zombies and will place a rocket under the zombies' owners.
    This will have the added bonus of reducing virus/worm propagation.
  71. Single-target DDOSs are pretty common by billstewart · · Score: 1

    [Number of students] x [Probability that a student pisses somebody off] x [Probability that pissed-off person can DDOS]
    is a relatively high percentage, especially if lots of the students are gamers (who seem to score fairly high in both probabilities. That's not a flame, just an observation.)

    A large ISP that I know fairly well (insert typical disclaimers here) tracks a lot of security problems on the net, and DDOS attacks against single targets seem to be fairly common, especially at universities, where the students have lots of bandwidth and computing resources and lots of unsecured PCs around to borrow. Another popular target is individual gamers (who are usually easier to overwhelm).

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    Bill Stewart
    New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
  72. maybe.. by zogger · · Score: 1

    --if he left the keys in it, it's a distinct possibility, depending on some other circumstances. If the car thief had to jimmy the lock or hotwire it, no. The owner made a reasonable effort, leaving the keys in is not a reasonable effort. And speaking as an ex insurance agent (long time ago but I was for about a year and change), I will assure you that leaving the keys in the car gets looked at pretty closely should you be forced to make a claim. The keys and locks exist for a reason, they assume you are a responsible adult, they expect you to act like one when you presented yourself to them for coverage. If the cops would make that charge I don't know, they certainly would rag on the owner though for being a lamer at a minimum. They *would* probably look at them as being an accessory, because the story would sound fishy to them. Anyway, that's not a good example of what I am talking about, a good example is like having a porch with a busted railing, you can see it's busted, and you know people come over, eventually someone falls off. You can't claim stoopid then. Backyard deep swimming pool with no decent fence, some little kid falls in. Sorry, you needed a fence. You run a business like a motel and you know you got scurvy people in and out of the rooms all the time, eventually the cops will shut you down and charge YOU for that. Lotsa precedent out there on an attractive nuisance.

    If you think an attractive nuisance is vapor ware, just google for it, it's a REAL thing that people get charged with and LOSE on in court. It's the ultimate anti lamer law. It's based on "you really should have known better", and when it comes to the net, in this day and age, anyone should know better, yes, even your aunt tillie. If she really is incapable of using the net wisely, they make web tvs that will allow pretty safe and functional surfing, get aunt tillie off a full featured PC then.

    It's one avenue I haven't seen used in the fight against internet craphack spam and virus and trojan pollution,and crime, and I think it should be looked at, precisely *because* we have a legal precedent for it in meatspace, and it goes way way back..

    Sorry, this is 2004, not naieve innocent semi friendly 1994, adults should be aware by now that being on the internet involves some responsible actions being taken by them personally. That excuse "they didn't know" was OK for a few years, but now it's a coverup for "I really can't be bothered". Yes, I DO think they are at least partially responsible for getting owned now, and then their box gets used in actual crimes. And yes, if it was me, then tough noogies for me, too. I make a serious effort to be responsible for my net connection, I don't take things for granted. I've met too many people who honestly are aware, but they will NOT make an effort to do anything but the minimum, which is use a default install of borgware and then become part of the problem within a few minutes. I know it, you know it, everyone knows it, so lets don't dance around it, lets just admit that it exists, k? It's more important for them to forward spyware laden jokes than to run minimum security upgrades. It's more important for them to spend hours on IM, and less than 5 seconds on making intelligent choices in their software and how it's configured, or to add some after market third party apps that actually make their OS functionally secure to some sort of minimum standard beyond "zero". Sorry, no more sympathy from me. I USED to be sympathetic, but not anymore, not when security and the internet is a regular staple even on the bland plain vanilla nightly news.

  73. Time for Gov't To Get off its Ass by bill_mcgonigle · · Score: 1

    As much as I hate to suggest it, it seems like underground vigilantism may be the only way to deal with the problem currently.

    Vigilantism usually isn't the right answer. We have law enforcement to fill this need.

    If we extend the physical world into the real world there would be a government agency you could call to report crimes such as this DDOS. They would have FOSS available for you to install (the investigator) that would log the perpertrators (surveillance) and report back accurate data to the law enforcement agency which could then stop the action (arrest) and levy fines (like a speeding ticket). Yes, you should get fined if your computer is used for a DDOS.

    I'm the first to admit government is rarely the right answer but when as a group the People need to intrude on the rights of the individual for the safety of the People, that's government's job.

    --
    My God, it's Full of Source!
    OUTSIDE_IP=$(dig +short my.ip @outsideip.net)
  74. Re:Worldpay and Paypal, that hurt bad by timealterer · · Score: 1

    People who have never worked in tech support knows that all businesses lose millions of dollars a second every time...

    People who haven't worked in tech support are marking this insightful or replying that it's exaggeration. If you work for tech support for an ISP or web host (or both, in my case) you'll find that a lot of customers will call, shouting about how ten minutes of downtime for their $19.95 hosting package is costing them thousands, if not millions of dollars. Either they're exaggerating, lying because they think the tech support guy can actually do anything different in that case, or are on a very underpowered hosting package.

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    - Allen Pike
    Altering time, one time at a time.
  75. to expensive ... by joda · · Score: 0

    I suggest _your regime_ should use the money needed for a complete internet infrastructural overhaul for something better ...

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    Buy all your crazy japanese videogames from
  76. SMS bombing by Hellkitten · · Score: 1

    So if some ass decides to SMS-bomb my cell why should I pay for it when my cell company didn't protect me?

    What kind of subscription do you have? Here (norway) I haven't seen any cell phone company that charges for incoming SMS. You'd still have to delete the shit but you won't have to pay for it

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