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Date:      Wed, 8 Jul 1998 10:39:34 -0500
From:      NOC-IPAD <sysadmin@greeves.mfn.org>
To:        "'freebsd-hackers@freebsd.org'" <freebsd-hackers@FreeBSD.ORG>
Subject:   Specifying ICMP Subtypes to IPFW
Message-ID:  <01BDAA5C.B307FC00@noc.mfn.org>

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Greetings.
	
	There has been a recent thread (mine) on "questions" which has
not been resolved - the last comment in this thread was from Doug White,
"No Idea...".

	I need to know how to specify an ICMP subtype to IPFW, for
instance, rather than killing *all* ICMPtype 3 messages using

	ipfw add 1 deny icmp from any to 123.123.123.0/24 icmptype 3

I need to kill only icmptype 3, subtype 11.  How would I specify this?

I have tried using icmptype 3.11, 3/11, 311, 3-11, etc...

Thanks!

J.A. Terranson
sysadmin@mfn.org


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