Re: Routing

[David Z Maze <dmaze@debian.org>]

"Mark Maas" <mark@menem.mine.nu> writes:

> 1.  (*) text/plain          ( ) text/html           

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> when only eth0 is up I can reach my local lan, 192.168.8.0-255, the
> lan of another firm, 192.168.3.0-255 and yet another firm,
> 10.1.0.0-255.
>
> But when I bring up eth1, I can only reach my local lan, and not the
> other two anymore.
>
> My guess is that everything other then 192.168.8.0-255 is thought to
> be Internet so it tries the eth1 nic. Which will not answer.
>
> Now how do I tell Debian to route all traffic for 192.168.3.0-255
> and 10.1.0.0-255 over the eth0 interface?

You probably need to use /sbin/route to tell the machine that there
are routes to 192.168.3.0/24 and 10.1.0.0/24 (/16?) via the gateway
machine on 192.168.8.0/24.  This will look something like:

  route add -net 192.168.3.0 netmask 255.255.255.0 gw 192.168.8.1
  route add -net 10.1.0.0 netmask 255.255.255.0 gw 192.168.8.1

(Just using 'dev eth0' tells route to spew packets for those networks
on to the local network, which isn't what you want.)

-- 
David Maze         dmaze@debian.org      http://people.debian.org/~dmaze/
"Theoretical politics is interesting.  Politicking should be illegal."
	-- Abra Mitchell