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Date:      Sun, 17 Dec 2000 15:22:00 -0600
From:      "Jacques A. Vidrine" <n@nectar.com>
To:        Jesper Skriver <jesper@skriver.dk>
Cc:        freebsd-net@FreeBSD.org, Poul-Henning Kamp <phk@critter.freebsd.dk>, Kris Kennaway <kris@FreeBSD.org>, security-officer@FreeBSD.org
Subject:   Re: cvs commit: src/sys/netinet ip_icmp.c tcp_subr.c tcp_var.h
Message-ID:  <20001217152200.A63080@hamlet.nectar.com>
In-Reply-To: <20001217220852.A20296@skriver.dk>; from jesper@skriver.dk on Sun, Dec 17, 2000 at 10:08:52PM %2B0100
References:  <20001217012007.A18038@citusc.usc.edu> <17340.977045052@critter> <20001217095914.A61976@spawn.nectar.com> <20001217102613.B61976@spawn.nectar.com> <20001217220852.A20296@skriver.dk>

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On Sun, Dec 17, 2000 at 10:08:52PM +0100, Jesper Skriver wrote:
> >    (2) These same messages are not handled for connections not in
> >        SYN-SENT: they ought to be
> 
> Well, yes, but the real problem is when sessions are setup, the reason I
> only configured it to affect sessions in SYN-SENT state, was to minimize
> the risk for a DoS.

This should not be treated any differently than a host/net unreachable
message.  If filters are (re)loaded while a connection is in progress,
then the ICMP message should serve to tear down the connection.

-- 
Jacques Vidrine / n@nectar.com / jvidrine@verio.net / nectar@FreeBSD.org


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