Using iptables to duplicate traffic

l_bratch · Guru Joined: 08 Feb 2005 Posts: 494 Location: Jersey

Hello

I current use a Gentoo router running kernel 2.6.22-gentoo-r5, which uses iptables to do NATting and traffic filtering.

I would like to configure it to duplicate traffic destined for a certain internal host to another host.

Eg:
Router: 192.168.0.1
PC1: 192.168.0.2
PC2: 192.168.0.3

I would like incoming traffic coming through Route, that is destined to go to PC2, to go to PC2 but also to PC1.

I have read about combining -j ROUTE with --tee, which would seem to do the job, but I can't get this working with Gentoo.

ervin.peters · Posted: Mon Sep 17, 2007 9:01 am Post subject: Route target in Kernel config?

Maybe you'd like to look at the kernel config for target route and enable it.

But whats your reason to try that?

Usually you'll have point to point connection, if you duplicate them you'll get one point to two point connections which will confuse all involved endpoints.

If you'd like to stream multimedia to several clients look for the according multicast technics and streaming servers.

ervin

l_bratch · Guru Joined: 08 Feb 2005 Posts: 494 Location: Jersey

Thanks for your reply.

I've looked in the kernel config already but cannot see the route target, do you know where it is?

My reason is just for fun actually - I am trying to see all JPEG traffic that passes through my internet connection, which is why I want to forward all HTTP traffic from my router to my PC.