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Question: Changing IP packets destined for a gateway

Forum: Network Buffers And Memory Management
Keywords: IP Packets routeing
Date: Thu, 15 Jan 1998 13:38:58 GMT
From: Ian Carr-de Avelon <ian@emit.com.pl>

I want to intercept IP packets which are destined for a gateway and if the source address is within a certain range send it to another gateway.
I first assumed that I could do that within ip_forward, but that is only called for packets which are being routed through. Some of the packets which I am interested in come from the host machine.
Any ideas on the easiest place to achieve this would be appreciated.

Why I want to do this
=====================
I have 2 connections to the Internet, but the IP-numbers are seperate from each up stream provider therefore the default route needs to depend on the source IP.

Ian


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