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Date:      Tue, 07 May 2002 18:30:38 -0400
From:      Tom Limoncelli <tal@lumeta.com>
To:        freebsd-security@FreeBSD.ORG
Subject:   ipf vs. ipfw
Message-ID:  <3CD8558E.2FA68C36@lumeta.com>

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I use ipf, and recently some people have asked me about ipfw that I
couldn't answer.  Hopefully people on this list can enlighten me.

Are ipf and ipfw different interfaces to the same in-kernel filtering
mechanism?  It doesn't look like it is, but I'd like that confirmed.

Is ipfw related at all to the Linux ipfw?  The syntax looks the same,
but the man page doesn't mention Linux.

Why does FreeBSD have both?  Is it because ipf is generic (ported to
Solaris, IRIX, OpenBSD, etc) and ipfw is specifically designed for
FreeBSD?

Thanks in advance!
--tal

P.S.  I'm collecting data here:
http://whatexit.org/tal/mywritings/freefilters.html

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