My favorite spammer trick it to send to the high order mx's first, in hopes of getting around postini type services. We are an ISP, so we can't be too crazy with our filters. We try to connect back to the mx's/A record for the domain and see if they will accept mail for the from address? If the server doesn't accept mail for them, we put a line in the headers saying so. This way people can decide if they want to accept it or not.
Technically correct. RFC states E-mail is supposed to be delivered to the the host specified in the MX record. If one doesn't exist, then mail will be delivered to the host pointed to by the A record. The problem here is if you don't have an A record for you base domain name, then it won't work.
Makes sense. What I think is happening if your IMAP servers inbox and your mutt Inbox are not the same place. I had the same problem. What I wound up doing was using procmail to put the mail back in my mail spool.
What I have is fetchmail grabs all the mail in my accounts, and redelivers to the mail server at home. Which runs it throug all the anti spam etc. In procmail I set my default to be/var/mail/doon (you location my vary). I also adjusted pine etc to not copy messages out of the spool so I can use IMAP or pine to read my mail.
Yeah we where having very bad brown outs here is Albany, NY. Seems to have stabilized now, We have been running on Generator for a while now.Looking at perhaps switching back to the commerical power soon
Unfortunately I will be giving it to myself since I am stuck babysittng servers and watching the Gen as I see commercial power flucating and coming in as high as 230V which my Gen Panel Keeps telling me is out of range. So until it calms down I am going to be sitting her surfing:)
I do this for my boxes @ home. Are you using tetchmail? All I do is run fetchmail in daemon mode, and have it deliver to the local boxes. Works like a charm. Not sure if there is a howto or anything, but I am sure a quick google for fetchmail howto might turn up something. You say you download the mail via pop, where on your system does it go. ? Does it go back into your mail spool or wind up in some other folder?
In regards to this, I wasn't trying to be sexist, honest. My wife in really smart, computers just are not her thing. MY wife is an artist first and an accountant second. So she can use Photoshop and Excel, and check her e-mail, but security etc. I have the same type firewall in front of my dads computers also. The problem comes down to security and ease of use unfortunately are mutually exclusive most times.
Since most of my family is now on Higher speed connections and I had a bunch of old Pentiums lying around, when they get their new connection, they get an old machine running FreeBSD and IPFilter to keep their boxen safer. I find it cuts down on the amount of Gratis Admin work I have to do.
To play the bad guy here, If people got used to doing this, all you need to do is fake an e-mail to said ISP's customers along with a link to some site that installs an even better worm/virus/spyware/malware/etc... The "ohh shiny"...Click syndrome would strike big time. Remember these are the same people that wind up giving out their CC/Paypal account info because of an "Official" looking e-mail.
Now how is the Isp going to keep track of what their Customers run. How are we supposed to get in touch with them? Looking at our maillogs (I admin a small, 13K or so ISP). Half or our customers don't even check their e-mail we provide them, their boxes just sit and collect spam until they hit quota. So it would be for naught. Even when we do send out e-mails most people ignore them anyway. Or call tech support to ask what they have to do.
Enough babbling out of me. I guess I need a lot more sleep, the 2 hours last night is no where near enough.
We are talking about much smaller areas here. The US is such a big country, with a lot of landmass, it is a lot harder to manage.
Billing:
Another thing to think about in the number portability, is billing. For instance, I get my phone in NY, then swith providers when I move to CA and port my number. So know when I dial someplace in CA, with a NY number is that Roaming, how is the billing computed? When my friends call me from NY, they pay a local call, but how is the billing computed? That is going to be one of the major stumbling blocks to this.
But to your house there is no point in the cable to put a repeater - if the signal can be read when it gets to where you are then it works, if not then it doesn't.
There are places you can put a repeater. On a very simple level you just need to pull the pair out of the binder and hook it up the a reapeater. The problem comes down to cost. MOst people don't want to pay alot for the service. Using standard hardware you can get out 18K feet and we have even had some luck out to about 22K feet. Really depends on plant. Using a special shelf and repeaters on the line you can get out over 30K(my dad bugs me about this everytime I go over to his house -- he is 28,400' away from the RLS that feeds his house). The problem is each repeater you put on the pole can only server 1 line. And they aren't cheap. So it winds up costing the telco a couple thousand dollars to get DSL out to your place, and then you won't want to pay the extra money. It is all about ROI. If the company isn't going to make their money back, why would they go and do the build?
Well Our meetup place turned out to be a Small Parking Lot With a non-descript Corporate type building. I hung out there for a while and even rode back to the "real" starbucks in Latham (Newton Plaza). And the Parking Lot. After about 30 Minutes and an Iced Carmel Machiatto (sp?). I rode home. Maybe Next month?
Something like X does when it boots. As shown below.
XFree86 Version 4.1.0.1 / X Window System (protocol Version 11, revision 0, vendor release 6510) Release Date: xx August 2001
If the server is older than 6-12 months, or if your card is
newer than the above date, look for a newer version before
reporting problems. (See http://www.XFree86.Org/FAQ) Build Operating System: Linux 2.2.19 m68k [ELF] Module Loader present (==) Log file: "/var/log/XFree86.0.log", Time: Tue Dec 11 20:15:04 2001 (==) Using config file: "/etc/X11/XF86Config-4"
developer tools cd that should have come with it. It isn't installed by default, as your avg home user has no need/want for them .
Nevermind Open Relays Old Version of Formmail
on
Spam Slows AT&T Email
·
· Score: 2, Informative
Got hit with this a couple days ago. Hmm, Why am I (postmaster) getting 400 bounce messages from one of our webservers? (we are an isp).
Starting digging through the logs and find an autotmated tool is using an old version of formmail that one of our users had installed. Seems like a spider found that is was a formmail cgi and tested it and found it to be vulnerable. so It sent e-mail to an aol box. 4 hours later what appears to be a Windoze program using the Microsoft URL Control is Sending tons of messages through this formmail cgi. By passing any rules we have setup in the mail server to dynamic blackholing of people that send too many messages or messages with too many invalid to's in the header, cause it came from a trusted host.
Besides that fact that I was pissed, I was intrigued. That was pretty slick, once you start closing down one way for them to spam they keep coming up with more.
On a side note we have found that if you simply strictly follow the RFC's you cut back a lot of mail you accept, and also Doing a reverse dns lookup, just to make sure their ip resolves to something helps a lot. By turing on Reverse Dns lookups and not accepting mail from ip's that don't resolve. We drop about 68K messages a day.
The nice part about/etc &/usr/local/etc is the age old argument about having a local tree. For instance. All of our boxes run the same version of FreeBSD. They all have/usr/ nfs-mounted from our main file server. All of the local packages are installed in/usr/local/* so when you upgrade the core OS, you don't mess with any of the local packages. You don't worry about overwriting any configuration files with the defaults etc..
Have a BS in CS. Stumbled upon Linux in College, got addicted. Was gradually given more and more responsibility at my job. And now low and behold I am an admin.
Slashdot Mirror
especially this bike
:)
http://www.marineturbine.com/superbike/
250HP , 500 lbs
My favorite spammer trick it to send to the high order mx's first, in hopes of getting around postini type services. We are an ISP, so we can't be too crazy with our filters. We try to connect back to the mx's/A record for the domain and see if they will accept mail for the from address? If the server doesn't accept mail for them, we put a line in the headers saying so. This way people can decide if they want to accept it or not.
Technically correct. RFC states E-mail is supposed to be delivered to the the host specified in the MX record. If one doesn't exist, then mail will be delivered to the host pointed to by the A record. The problem here is if you don't have an A record for you base domain name, then it won't work.
Makes sense. What I think is happening if your IMAP servers inbox and your mutt Inbox are not the same place. I had the same problem. What I wound up doing was using procmail to put the mail back in my mail spool.
/var/mail/doon (you location my vary). I also adjusted pine etc to not copy messages out of the spool so I can use IMAP or pine to read my mail.
What I have is fetchmail grabs all the mail in my accounts, and redelivers to the mail server at home. Which runs it throug all the anti spam etc. In procmail I set my default to be
Yeah we where having very bad brown outs here is Albany, NY. Seems to have stabilized now, We have been running on Generator for a while now.Looking at perhaps switching back to the commerical power soon
Unfortunately I will be giving it to myself since I am stuck babysittng servers and watching the Gen as I see commercial power flucating and coming in as high as 230V which my Gen Panel Keeps telling me is out of range. So until it calms down I am going to be sitting her surfing :)
I do this for my boxes @ home. Are you using tetchmail? All I do is run fetchmail in daemon mode, and have it deliver to the local boxes. Works like a charm. Not sure if there is a howto or anything, but I am sure a quick google for fetchmail howto might turn up something. You say you download the mail via pop, where on your system does it go. ? Does it go back into your mail spool or wind up in some other folder?
In regards to this, I wasn't trying to be sexist, honest. My wife in really smart, computers just are not her thing. MY wife is an artist first and an accountant second. So she can use Photoshop and Excel, and check her e-mail, but security etc. I have the same type firewall in front of my dads computers also. The problem comes down to security and ease of use unfortunately are mutually exclusive most times.
Since most of my family is now on Higher speed connections and I had a bunch of old Pentiums lying around, when they get their new connection, they get an old machine running FreeBSD and IPFilter to keep their boxen safer. I find it cuts down on the amount of Gratis Admin work I have to do.
To play the bad guy here, If people got used to doing this, all you need to do is fake an e-mail to said ISP's customers along with a link to some site that installs an even better worm/virus/spyware/malware/etc... The "ohh shiny"...Click syndrome would strike big time. Remember these are the same people that wind up giving out their CC/Paypal account info because of an "Official" looking e-mail.
Now how is the Isp going to keep track of what their Customers run. How are we supposed to get in touch with them? Looking at our maillogs (I admin a small, 13K or so ISP). Half or our customers don't even check their e-mail we provide them, their boxes just sit and collect spam until they hit quota. So it would be for naught. Even when we do send out e-mails most people ignore them anyway. Or call tech support to ask what they have to do.
Enough babbling out of me. I guess I need a lot more sleep, the 2 hours last night is no where near enough.
Hopefully the ATM isn't on the Internet, and it is on a private network that has infected hosts on it.
If it was just out on the net and got hit by that I would be pulling all my money from that bank rather quickly.
Ahh that is why I have the firewall in front of the wife's machine. So she can't turn it off. :)
4. Numbers are geographically fixed.
eg, in the UK all mobile numbers begin with 07xxx
From the Cia World Fact Book:
United Kingdom: slightly smaller than Oregon
We are talking about much smaller areas here. The US is such a big country, with a lot of landmass, it is a lot harder to manage.
Billing: Another thing to think about in the number portability, is billing. For instance, I get my phone in NY, then swith providers when I move to CA and port my number. So know when I dial someplace in CA, with a NY number is that Roaming, how is the billing computed? When my friends call me from NY, they pay a local call, but how is the billing computed? That is going to be one of the major stumbling blocks to this.
We perform daily backups. But we don't keep 3 months worth of them. They are for Diaster Recovery only.
But to your house there is no point in the cable to put a repeater - if the signal can be read when it gets to where you are then it works, if not then it doesn't.
There are places you can put a repeater. On a very simple level you just need to pull the pair out of the binder and hook it up the a reapeater. The problem comes down to cost. MOst people don't want to pay alot for the service. Using standard hardware you can get out 18K feet and we have even had some luck out to about 22K feet. Really depends on plant. Using a special shelf and repeaters on the line you can get out over 30K(my dad bugs me about this everytime I go over to his house -- he is 28,400' away from the RLS that feeds his house). The problem is each repeater you put on the pole can only server 1 line. And they aren't cheap. So it winds up costing the telco a couple thousand dollars to get DSL out to your place, and then you won't want to pay the extra money. It is all about ROI. If the company isn't going to make their money back, why would they go and do the build?
Well Our meetup place turned out to be a Small Parking Lot With a non-descript Corporate type building. I hung out there for a while and even rode back to the "real" starbucks in Latham (Newton Plaza). And the Parking Lot. After about 30 Minutes and an Iced Carmel Machiatto (sp?). I rode home. Maybe Next month?
Probably..
I voted for Jillians as it is right downt the street from Our datacenter.
I meant 5 ppl RSVP'd.
See ya there.
Will do :)
The scary part is that for Tech-valley there are 5 ppl coming.. Some tech .
Something like X does when it boots. As shown below.
XFree86 Version 4.1.0.1 / X Window System
(protocol Version 11, revision 0, vendor release 6510)
Release Date: xx August 2001
If the server is older than 6-12 months, or if your card is
newer than the above date, look for a newer version before
reporting problems. (See http://www.XFree86.Org/FAQ)
Build Operating System: Linux 2.2.19 m68k [ELF]
Module Loader present
(==) Log file: "/var/log/XFree86.0.log", Time: Tue Dec 11 20:15:04 2001
(==) Using config file: "/etc/X11/XF86Config-4"
developer tools cd that should have come with it. It isn't installed by default, as your avg home user has no need/want for them .
Got hit with this a couple days ago. Hmm, Why am I (postmaster) getting 400 bounce messages from one of our webservers? (we are an isp).
Starting digging through the logs and find an autotmated tool is using an old version of formmail that one of our users had installed. Seems like a spider found that is was a formmail cgi and tested it and found it to be vulnerable. so It sent e-mail to an aol box. 4 hours later what appears to be a Windoze program using the Microsoft URL Control is Sending tons of messages through this formmail cgi. By passing any rules we have setup in the mail server to dynamic blackholing of people that send too many messages or messages with too many invalid to's in the header, cause it came from a trusted host.
Besides that fact that I was pissed, I was intrigued. That was pretty slick, once you start closing down one way for them to spam they keep coming up with more.
On a side note we have found that if you simply strictly follow the RFC's you cut back a lot of mail you accept, and also Doing a reverse dns lookup, just to make sure their ip resolves to something helps a lot. By turing on Reverse Dns lookups and not accepting mail from ip's that don't resolve. We drop about 68K messages a day.
The nice part about /etc & /usr/local/etc is the age old argument about having a local tree. For instance. All of our boxes run the same version of FreeBSD. They all have /usr/ nfs-mounted from our main file server. All of the local packages are installed in /usr/local/* so when you upgrade the core OS, you don't mess with any of the local packages. You don't worry about overwriting any configuration files with the defaults etc..
C:\>route -?
:)
Is your friend, look at the -p option which will make the route persistant accross boots of the system. Doesn't work win Win95 though
so a route -p add should solve your problem nicely
Not really. The car can't actually be put into drive. If you try to put it into drive, it will cut the power and turn off.
Although I do think it is rather neat to be able to telnet into my dreamcast. :)
Have a BS in CS. Stumbled upon Linux in College, got addicted. Was gradually given more and more responsibility at my job. And now low and behold I am an admin.