Assuming I'm understanding everything you are saying, You'd probably want to set up an interface on your local linux router that will be used when routing traffic to this specified IP that is elsewhere. Of course you'll next want to set a route to route all traffic to this specific IP on this new interface. This will isolate the traffic between your local network and this specific IP to only that interface. You could then either use ifconfig, or cat /proc/net/dev to calculate the number of packets, bytes, etc that traverse that interface. I've even seen Perl scripts that will take that data and send it to MRTG for some nice graphs. I use that on my network to get stats from our campus routers. Khanh Tran Network Operations Sarah Lawrence College -----Original Message----- From: gummi7@simnet.is [mailto:gummi7@simnet.is] Sent: Sunday, February 02, 2003 5:11 PM To: netfilter@lists.netfilter.org Subject: Measuring traffic that goes thrugh a specific IP Hello I'm a linux/iptables/netfilter newbie, but I want to ask you a simple question. It's a long story and unrellevant to tell you why I want to do it so i'll just get straigt to the point. I want to be able to measure(with my linux router) all the traffic from the computers on my network that go thrugh a specifc IP number wich is located in another place in my country. That is, if a computer on my network accesses a website and goes trough a specifed IP number to get that website, I want to be able to measure the amount of data that goes trough that specified IP number, but only the data on my behalf. Note that I do not have phisical(nor telnet or ssh) access to the router with the specifed IP number that I want to measure. Can I do that with iptables and/or ipfilter? A yes is all I have to hear if that is possible but an example or a little help wouldn't hurt :) With reagards, Guğmundur Viktorsson ps. Please say so if I don't make myself clear enough.
