Outgoing interface selection by source address

Outgoing interface selection by source address

[Pawel Hadam]

Hi all

I have 2 local interfaces (eth0 & eth1) and thus 2 IPv6 addresses (src0 &
src1).

I have an SCTP/IPv6 application that binds to one of the addresses
(let's say src0) and sends packets to some destination (dst). But
according to the classical routing policy, all packets in this
connection (src0, dst) are routed via eth1. And I would like them to be
routed via interface eth0, as src0 is the address of eth0 not eth1.
Is it possible to do it with netfilter for IPv6 ? I mean, is it possible
to route the packets via the proper outgoing interface by theirs source
address, like this:

if (src = src0) then send via eth0
if (src = src1) then send via eth1
if (src = other) do whatever

Could anybody give any ideas how to solve my problem, please?

I am using linux-2.6.0-testXX versions.

With best regards
Pawel

Re: Outgoing interface selection by source address

[Ralf Spenneberg]

Am Don, 2003-11-27 um 14.55 schrieb Pawel Hadam:
> Hi all
> 
> I have 2 local interfaces (eth0 & eth1) and thus 2 IPv6 addresses (src0 &
> src1).
> 
> I have an SCTP/IPv6 application that binds to one of the addresses
> (let's say src0) and sends packets to some destination (dst). But
> according to the classical routing policy, all packets in this
> connection (src0, dst) are routed via eth1. And I would like them to be
> routed via interface eth0, as src0 is the address of eth0 not eth1.
> Is it possible to do it with netfilter for IPv6 ? I mean, is it possible
> to route the packets via the proper outgoing interface by theirs source
> address, like this:
It is, but not using netfilter (AFAIK). Take a look at the 
Linux Advanced Routing and Traffic Howto: lartc.org

Cheers,

Ralf
-- 
Ralf Spenneberg
RHCE, RHCX

Book: VPN mit Linux
Book: Intrusion Detection für Linux Server   http://www.spenneberg.com
IPsec-Howto				     http://www.ipsec-howto.org
Honeynet Project Mirror:                     http://honeynet.spenneberg.org