From owner-freebsd-hackers Thu Jun 8 16:17:54 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from obie.softweyr.com (obie.softweyr.com [204.68.178.33]) by hub.freebsd.org (Postfix) with ESMTP id B16DF37B760 for ; Thu, 8 Jun 2000 16:17:49 -0700 (PDT) (envelope-from wes@softweyr.com) Received: from softweyr.com (ip110.salt-lake-city9.ut.pub-ip.psi.net [38.31.167.110]) by obie.softweyr.com (8.8.8/8.8.8) with ESMTP id RAA06544; Thu, 8 Jun 2000 17:17:17 -0600 (MDT) (envelope-from wes@softweyr.com) Message-ID: <3940296E.D499F88E@softweyr.com> Date: Thu, 08 Jun 2000 17:17:02 -0600 From: Wes Peters Organization: Softweyr LLC X-Mailer: Mozilla 4.7 [en] (X11; U; FreeBSD 4.0-STABLE i386) X-Accept-Language: en MIME-Version: 1.0 To: Dave Preece Cc: "Kenneth D. Merry" , freebsd-hackers@FreeBSD.ORG Subject: Re: Path MTU discovery. References: <67B808B0DD93D211ABEE0000B498356B02BC71@internet.kbgroup.co.nz> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Dave Preece wrote: > > > > Just learning about this: I can see the advantages but does > > anything use it? > > > > Sure, TCP uses it. > > > > TCP (at least in FreeBSD) sets the "don't frag" bit on all > > its outgoing > > packets. > > Good lord, so it does. Mental note, packet sniff before posting in future. > > So... thinking about what this means for firewalls and natd. If we block all > incoming ICMP's across the firewall That's a no-no. -- "Where am I, and what am I doing in this handbasket?" Wes Peters Softweyr LLC wes@softweyr.com http://softweyr.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message