Date: Wed, 27 Jun 2001 12:49:31 -0230 From: Graham Rose <graham@avint.net> To: <freebsd-security@freebsd.org> Subject: RE: disable traceroute to my host Message-ID: <01062712515103.10969@hercules.avint.net> In-Reply-To: <NFBBKAEAALGGGFKINBLAMEFMCAAA.peter@sysadmin-inc.com> References: <NFBBKAEAALGGGFKINBLAMEFMCAAA.peter@sysadmin-inc.com>
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http://www.isi.edu/in-notes/iana/assignments/icmp-parameters www.iana.org On Wed, 27 Jun 2001, Peter Brezny wrote: > Peter, > > What is a good document to get more info on ICMP types? > > Thanks. > > Peter Brezny > SysAdmin Services Inc. > > -----Original Message----- > From: owner-freebsd-security@FreeBSD.ORG > [mailto:owner-freebsd-security@FreeBSD.ORG]On Behalf Of Peter Jeremy > Sent: Tuesday, June 26, 2001 5:15 PM > To: 3APA3A > Cc: alexus; freebsd-security@FreeBSD.ORG > Subject: Re: disable traceroute to my host > > > On 2001-Jun-26 15:08:13 +0400, 3APA3A <3APA3A@SECURITY.NNOV.RU> wrote: > >deny ICMP from (YOURNETWORK) to any icmptypes 0,3,11 out > > > >0 - to stop windows traceroute and ping > >3 - to stop BSD-style traceroute > >11 - to prevent intermediate router to reply traceroute > > Blocking ICMP type 3 will break Path-MTU discovery (which relies on > type 3 code 4). > > Peter > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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