Routing With Two ISPs?

Drew Tomlinson drew at
Fri Nov 7 07:05:14 PST 2003

----- Original Message -----
From: "Lowell Gilbert" <freebsd-questions-local at>
Sent: Friday, November 07, 2003 6:02 AM

> "Drew Tomlinson" <drew at> writes:
> > I have a 4.8 box serving as a gateway with two connections to the
> > Internet.  Is there some way to set the box up so that packets are
> > routed out through the same interface from which they arrived?  For
> > example, if a connection is initiated on port 80 from a packet arriving
> > on one interface, is there a way to make the outgoing packets from my
> > web server use that same interface as a gateway instead of the default
> > interface?
> Strictly speaking, this wouldn't be IP.  There are a number of ways to
> hack something like this, but bear in mind that they all really are
> hacks.  The "non-hack" way to do it would be to run real routing
> protocols, but that requires cooperation from the ISPs...

And since I'm not a very good 'hack', I'll stick with the tools provided.
:)  Thanks for your reply.  I posted in -net (I'll forward to you if you
want) regarding my specific salutation and why 'ipfw fwd' hasn't worked for

Any ideas you have will be greatly appreciated.

Thanks again!


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