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Date:      Mon, 9 Dec 2002 16:16:40 -0500
From:      "Peter Brezny" <peter@skyrunner.net>
To:        <freebsd-net@freebsd.org>
Subject:   passive mode ftp server, need stateful ipfw rule.
Message-ID:  <NEBBIGLHNDFEJMMIEGOOAELGFEAA.peter@skyrunner.net>

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Is it possible to create an ipfw ruleset for an ftp server in passive mode
that figures out which random port the ftp server is going to open to only
allow the client that initiated the connection to connect to that port?


Since the client initiates it's data connection from a random port to the
new random data port on the passive mode server, i've so far not been able
to come up with decent firewall rules to protect this type of system.

TIA,


Peter Brezny
Skyrunner.net



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