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Date:      24 Nov 2000 12:52:14 +0100
From:      Dag-Erling Smorgrav <des@ofug.org>
To:        Nevermind <never@nevermind.kiev.ua>
Cc:        Vlad <tmd@tmd.df.ru>, security@FreeBSD.ORG
Subject:   Re: ipf - icmp
Message-ID:  <xzpvgtdsi35.fsf@flood.ping.uio.no>
In-Reply-To: Nevermind's message of "Fri, 24 Nov 2000 13:42:19 %2B0200"
References:  <Pine.BSF.4.21.0011231431360.18361-100000@tmd.df.ru> <xzp66ldtz6k.fsf@flood.ping.uio.no> <20001124134218.A17181@nevermind.kiev.ua>

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Nevermind <never@nevermind.kiev.ua> writes:
> > No. There is no way to completely prevent someone from tracerouting
> > you. You can make it slightly harder by blocking incoming UDP (which
> > your ruleset does not), but that's about it.
> Why not to use ipfw?
> ipfw add deny icmp from any to any via sis0

This still won't prevent traceroutes. The only 100% foolproof way to
prevent anyone from tracerouting your machine is to take it off the
net.

DES
-- 
Dag-Erling Smorgrav - des@ofug.org


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