*BSD News Article 75945


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From: Jim King <jim@ase.telerate.com>
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: NAT / IP Masquerading
Date: Mon, 12 Aug 1996 13:00:19 -0500
Organization: Communique Inc., New Orleans
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I have an application where I'm thinking of using a FreeBSD box as a
router to do NAT.  This is very straightforward, I just want to do a
one-to-one mapping between one class C to another - e.g. 1.2.3.4 maps to
5.6.7.8 and vice versa.

Has anyone implemented this type of NAT in ipfw?  (This seems like a
natural.)

I've tried running IP Filter on FreeBSD 2.1.5-RELEASE.  It sometimes
works, but today I'm getting a kernel panic every time I try to ping
something through that box.  Does IP Filter work better on 2.1.0?

Jim