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Date:      Fri, 7 Nov 2003 08:59:38 +0100 (MET)
From:      Helge Oldach <helge.oldach@atosorigin.com>
To:        drew@mykitchentable.net (Drew Tomlinson)
Cc:        freebsd-net@freebsd.org
Subject:   Re: Routing With Two ISPs?
Message-ID:  <200311070759.IAA19949@galaxy.hbg.de.ao-srv.com>
In-Reply-To: <022501c3a491$e46bf780$6e2a6ba5@lc.ca.gov> from Drew Tomlinson at "Nov 6, 2003  7:14:47 pm"

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Drew Tomlinson:
>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?

Unfortunately not. While your application (multi-homing, aka "strong ES"
model of RFC 1122) would appear simpler, a general solution would target
at true policy-based routing.

The latest information I have seen is
http://www.mail-archive.com/freebsd-net@freebsd.org/msg07737.html.

Helge



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