From owner-freebsd-security Sun Jan 17 15:14:00 1999 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA16946 for freebsd-security-outgoing; Sun, 17 Jan 1999 15:14:00 -0800 (PST) (envelope-from owner-freebsd-security@FreeBSD.ORG) Received: from khavrinen.lcs.mit.edu (khavrinen.lcs.mit.edu [18.24.4.193]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA16910 for ; Sun, 17 Jan 1999 15:13:37 -0800 (PST) (envelope-from wollman@khavrinen.lcs.mit.edu) Received: (from wollman@localhost) by khavrinen.lcs.mit.edu (8.9.1/8.9.1) id SAA09685; Sun, 17 Jan 1999 18:09:14 -0500 (EST) (envelope-from wollman) Date: Sun, 17 Jan 1999 18:09:14 -0500 (EST) From: Garrett Wollman Message-Id: <199901172309.SAA09685@khavrinen.lcs.mit.edu> To: "Daniel O'Callaghan" Cc: freebsd-security@FreeBSD.ORG Subject: Re: Small Servers - ICMP Redirect In-Reply-To: References: <007701be4256$f01ff740$02c3fe90@cisco.com> Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org < said: > It will also block useful things like source-quench. ICMP exists for a > reason. Actually, it will block useful things like `destination unreachable' and `fragmentation required'. Source Quench is not useful -- just ask any router vendor. As a general rule, you should accept all UNREACHABLE, TIME EXCEEDED, and PARAMETER PROBLEM messages, might or might not accept ECHO REQUEST and ECHO RESPONSE, and should drop all others. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message