I believe that Kernels running 2.4 and netfilter (i.e. iptables) check state of TCP connections. i.e. They follow the connection build (SYN, SYN/ACK, ACK) and the teardown (FIN, FIN/ACK, ACK).
I don't think ipchains works that way and is a simple packet filtering firewall.
"Now, by employing NAT (via 802.11b for instance) and possibly selling it on (or just sharing the cost) customers are also raising the contention level and effectively raising the chance that other customers will not get their quota of 512kbps"
By having two users using the same cable modem you increase the probability that more traffic will be used.
Broadband ISPs do not have the bandwidth to simultaneously guarantee their advertised bandwidth to all their customers at the same time. That is what I infer by the term contention.
By sub-leasing your cable connection to other users you leach into the ISPs calculation of the contention as your have two or more people using the same cable connection.
I also clearly state that I don't believe that NAT is the problem, yet your manipulation of my statement in your quote gives a misleading opinion.
By having more than one computer (read more that one person) connected to the same cable modem you are raising the actual contention level of the connection.
Broadband ISPs calculate a contention level - although they limit you to a certain bandwidth, say 512kbps and have, say 2000 customers, they probably don't have a 1 Gigabit backbone connection.
That is to say that if all 2000 customers were to initiate a download they wouldn't get the 512kbps they pay for.
If the ISP has an advertised contention ratio of 50:1 then this scenario means that the 2000 customers are connected to a 20Mbps backbone.
It means that only 1 in 50 customers are using their bandwidth quota at any one time.
Now, by employing NAT (via 802.11b for instance) and possibly selling it on (or just sharing the cost) customers are also raising the contention level and effectively raising the chance that other customers will not get their quota of 512kbps.
My personal opinion is that NAT itself is not the problem, sub-leasing your Internet connection in any way is.
moderators mod this one up 1 (but I don't get any credit as my karma is 50 already), then two come alone a and mod it down...
back to 48... lovely...
It seems I have been mistaken though - I've looked and it seems that all use 2 pairs except for T4 and Gigabit Ethernet over copper... the best I could find was this reference, it makes no mention of duplex, but does give some information.
I have no idea where I got the idea that full duplex required extra pairs - I must be such a dumbo.
ethernet uses *1* twisted pair (Cat3 or better)
fast ethernet uses *1* twisted pair (Cat5 or better)
Half Duplex Ethernet/Fast Ethernet use 2 pairs
Full Duplex Ethernet/Fast Ethernet use 4 pairs
Full Duplex is not CSMA/CD (Collision Sense Multiple Access/Collision Detect), which means that the NIC can operate 100Mbps downstream and 100Mbps upstream simultaneously in the case of Fast-Ethernet.
Our office is cabled with Cat-5E and I've never experienced a fried NIC connected accidentaly to a fax or modem line.
This is, of course, understandable as I don't really think anybody needs a server farm if they don't have enough to eat at the end of the day."
I seem to make a habit of pointing out these typical americanisms, often at the expense of Karma. I suppose you can't help getting narrow-minded moderators.
The sentence read in the context of the article, as if every country outside of the USA has a famine problem. There are plenty of volunteer organisations around the world in countries that are not experiencing drought or famine, judging by US cable TV - the USA is one of those countries.
Also, their ADSL package for regualar home users is tied to USB modems
I am a BTopenworld subscriber and I am a Linux user.
A Couple of Points need to be made:
The cheapest ADSL option is a USB modem, BT also supply Ethernet connections.
USB was chosen to allow users to install ADSL service without opening up a computer.
The USB modem is the Alcatel Speedtouch USB. Alcatel supply Linux drivers for this device, and Open Source drivers have been developed by Linux developers.
I have the USB service and it works a treat through my Linux firewall/router.
Slashdot Mirror
I have been with Slackware since 1995, when they released 2.3.
Now the introductions are over, let's think about Netscape.
IMHO Netscape is bound to have more users than Slackware it runs on multi-platform, it is released with almost every Linux distribution.
Enough... you must be a troll?
Yet someone (a moderator) found this funny?
I just built a Dual Athlon system... I installed XP just waiting for 8.1 - no other Operating System will do, until 8.1 is avaiable.
PS Has anyone noticed this on the BBC? Is it a scoop or is it old news?
Yes, you make a good point... it infuriates me too...
To significantly improve your netscape browsing experience under linux try the following lines in your .Xdefaults:
: 1001 : 100
Netscape*documentFonts.sizeIncrement: 20
Netscape*documentFonts.xResolution*iso-8859-1
Netscape*documentFonts.yResolution*iso-8859-
This helped the font situation out for me no end.
There are other things you can do, such as importing some of the Microsoft TTF fonts as many pages now specify those fonts in their HTML.
it doesn't have a keyboard... so you have to carry that around as well...
probably also has a heavy external PSU...
Does that mean that I now only have to sniff packets for half the time in order to decode the WEP keys?
Don't they teach the difference between "affect" and "effect" at school anymore?
I may be wrong here, so check...
I believe that Kernels running 2.4 and netfilter (i.e. iptables) check state of TCP connections. i.e. They follow the connection build (SYN, SYN/ACK, ACK) and the teardown (FIN, FIN/ACK, ACK).
I don't think ipchains works that way and is a simple packet filtering firewall.
Send Mail to newsonline@bbc.co.uk
make your opinion heard.
That is the lamest "exploit" I've ever seen. It's not even an exploit at all.
Here's a way to do something that you could do with the Kazaa/Morpheus clients software anyway
Is there any directory traversal technique that I can use to see files outside of the shared kazaa/morpheus folder?
Why not???
bing bing bing! bing!!
mod this down to -1 - please.
oh karma to burn... it burns well you know.
Actually - Mr Anonymous Coward,
I'm already at 50 karma, a situation that you'll certainly never accomplish in your life, that karma means nothing to me anymore.
To prove it - I post this at 2, to give the moderators some extra work.
Please mod me down to -1.
Thanks you complete arsehole.
Moderate parent to +1 - he's got irony!!!
Flamebait!!! - someone moderate those moderators!!!
"Lets hit those servers"???
You've got to be kidding?
An early release of a development kernel?
As if....
You misquote me - are you doing that on purpose?
I said:
"Now, by employing NAT (via 802.11b for instance) and possibly selling it on (or just sharing the cost) customers are also raising the contention level and effectively raising the chance that other customers will not get their quota of 512kbps"
By having two users using the same cable modem you increase the probability that more traffic will be used.
Broadband ISPs do not have the bandwidth to simultaneously guarantee their advertised bandwidth to all their customers at the same time. That is what I infer by the term contention.
By sub-leasing your cable connection to other users you leach into the ISPs calculation of the contention as your have two or more people using the same cable connection.
I also clearly state that I don't believe that NAT is the problem, yet your manipulation of my statement in your quote gives a misleading opinion.
By having more than one computer (read more that one person) connected to the same cable modem you are raising the actual contention level of the connection.
Broadband ISPs calculate a contention level - although they limit you to a certain bandwidth, say 512kbps and have, say 2000 customers, they probably don't have a 1 Gigabit backbone connection.
That is to say that if all 2000 customers were to initiate a download they wouldn't get the 512kbps they pay for.
If the ISP has an advertised contention ratio of 50:1 then this scenario means that the 2000 customers are connected to a 20Mbps backbone.
It means that only 1 in 50 customers are using their bandwidth quota at any one time.
Now, by employing NAT (via 802.11b for instance) and possibly selling it on (or just sharing the cost) customers are also raising the contention level and effectively raising the chance that other customers will not get their quota of 512kbps.
My personal opinion is that NAT itself is not the problem, sub-leasing your Internet connection in any way is.
Can you imagine a beowulf cluster of these?
oh great -
moderators mod this one up 1 (but I don't get any credit as my karma is 50 already), then two come alone a and mod it down...
back to 48... lovely...
It seems I have been mistaken though - I've looked and it seems that all use 2 pairs except for T4 and Gigabit Ethernet over copper... the best I could find was this reference, it makes no mention of duplex, but does give some information.
I have no idea where I got the idea that full duplex required extra pairs - I must be such a dumbo.
ethernet uses *1* twisted pair (Cat3 or better)
fast ethernet uses *1* twisted pair (Cat5 or better)
Half Duplex Ethernet/Fast Ethernet use 2 pairs
Full Duplex Ethernet/Fast Ethernet use 4 pairs
Full Duplex is not CSMA/CD (Collision Sense Multiple Access/Collision Detect), which means that the NIC can operate 100Mbps downstream and 100Mbps upstream simultaneously in the case of Fast-Ethernet.
Our office is cabled with Cat-5E and I've never experienced a fried NIC connected accidentaly to a fax or modem line.
You may not be aware of this but you can use your Cat-5E cable to run your telephones over.
I don't think you'll need Fibre - doesn't Cat-5E support gigabit speeds?
Porbably the most powerful force obliterating free communication is neither fundamentalist nor jack-booted: it's obscurity
huh? Porbably???
This is, of course, understandable as I don't really think anybody needs a server farm if they don't have enough to eat at the end of the day."
I seem to make a habit of pointing out these typical americanisms, often at the expense of Karma. I suppose you can't help getting narrow-minded moderators.
The sentence read in the context of the article, as if every country outside of the USA has a famine problem. There are plenty of volunteer organisations around the world in countries that are not experiencing drought or famine, judging by US cable TV - the USA is one of those countries.
Also, their ADSL package for regualar home users is tied to USB modems
I am a BTopenworld subscriber and I am a Linux user.
A Couple of Points need to be made:
The cheapest ADSL option is a USB modem, BT also supply Ethernet connections.
USB was chosen to allow users to install ADSL service without opening up a computer.
The USB modem is the Alcatel Speedtouch USB. Alcatel supply Linux drivers for this device, and Open Source drivers have been developed by Linux developers.
I have the USB service and it works a treat through my Linux firewall/router.
OK. Don't you ever go about implementing a firewall until you've read a little more.
You shouldn't completely trust all the networks that your firewall separates.
You seem to have completely missed the point, or have only implemented firewalls that allow full outbound access.