Service/port based routing

[Gilad Ben-Yossef]

geoffrey mendelson wrote:

>
> I have two routers on my network. let's say 192.168.1.1 and 
> 192.168.1.2. One connects to Netvision the other to 012. Now host 
> based routing is simple, e.g. I can say route all packets to host 
> 1.2.3.4 via gateway 192.168.1.1 and using a default route, everything 
> else via 192.168.1.2.
>
> What I want to do is become more granular. I want to be able to route 
> all packets to/from a specific port via one router, and everything 
> else to use the
> default route.
>
> These are all connections to/from this particular system, I don't need 
> to do it for everything on my network, or I can do it indiviudally. 
> Currently the systems are running Ubuntu 9.04 with the latest kernel, 
> but if I need to I can change them.
>

Either do it globally with packet marks and specific routing table as 
Shimi suggested, or, which may or may not be simpler in your case 
depending on the specifics, you ca force connection from a specific 
socket or application via a specific device - here's how: 
http://tuxology.net/2008/05/15/forcing-connections-through-a-specific-interface/

Cheers,
Gilad



-- 
Gilad Ben-Yossef
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