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Date:      Wed, 16 Aug 2000 06:28:12 -0400 (EDT)
From:      "Chris D. Faulhaber" <jedgar@fxp.org>
To:        freebsd-security@FreeBSD.org
Subject:   Restricting ftpd commands
Message-ID:  <Pine.BSF.4.21.0008152038470.49740-100000@earth.causticlabs.com>

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I have found quite a few commands that ftpd shouldn't necessarily be
responding to if the user hasn't logged in.  In total, the following
commands are taught to not talk to strangers: TYPE, STRU, MODE, ALLO,
ABOR, SITE IDLE, SYST, REST.  Many of these were obtained from OpenBSD.

As a side note, OpenBSD doesn't restrict many of the command we already
do.

See http://www.fxp.org/~jedgar/ftpcmd.y.diff for the diff.

-----
Chris D. Faulhaber - jedgar@fxp.org - jedgar@FreeBSD.org
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FreeBSD: The Power To Serve   -   http://www.FreeBSD.org





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