packet mangling and routing

Corey Edwards tensai at
Tue Oct 16 15:56:35 MDT 2007

On Tue, 2007-10-16 at 14:45 -0600, Michael L Torrie wrote:
> Corey Edwards wrote:
> >> Example routing table:
> >> Destination	Genmask		Gateway		Iface
> >>	eth0
> >>		eth0
> >>		eth1
> >>	eth1
> > 
> > I think I see the source of the problem. You've got a route to all of
> > via I suspect Michael doesn't. Instead he's got two
> > routes to Two default routes like that is generally not what
> > anybody wants.
> > 
> > Michael, can you paste the current routing table.
> I don't have any routing table yet.  I'm just working through all of the
> potential problems before I install the server.  I initially was
> thinking that routes such as what Lonnie suggested would work. Then as I
> thought about, I wondered if they might not.  Now I'm wondering if they
> will, in fact work.  So I'll test it empirically tomorrow.  After this
> discussion I have great hopes that it will work.

Ah, OK. I do think it'll work for you as long as you have just one
default route going out the 128.187.x.x interface and another 10/8 route
going out the 10.x.x.x interface via your 10.x.x.x next hop.

> Would iptables running as a firewall on the public interface complicate
> things?  I doubt it.  But who knows.

I'm sure it can work, you'll just have to be careful where you use
interface filters since traffic to 128.187.x.x will arrive on both


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