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Date:      Wed, 31 Oct 2007 00:01:28 +0100
From:      Ivan Voras <ivoras@freebsd.org>
To:        freebsd-questions@freebsd.org
Subject:   Re: ipfw -- why need to let icmp out that I already let in?
Message-ID:  <fg8d4b$vak$2@ger.gmane.org>
In-Reply-To: <47255D54.40700@dreamchaser.org>
References:  <47255D54.40700@dreamchaser.org>

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freebsd@dreamchaser.org wrote:

> add 10510 allow icmp from any to any out via oif() keep-state

I don't think ICMP is stateful :)

You need both in and out rules for ICMP because the logical responses to
packets can't be reliably connected into a single communication.



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