[18790] in bugtraq
Re: ICMP fragmentation required but DF set problems.
daemon@ATHENA.MIT.EDU (Mark.Andrews@NOMINUM.COM)
Wed Jan 24 13:37:28 2001
Message-ID: <200101232352.f0NNqRF96940@drugs.dv.isc.org>
Date: Wed, 24 Jan 2001 10:52:27 +1100
Reply-To: Mark.Andrews@NOMINUM.COM
From: Mark.Andrews@NOMINUM.COM
X-To: provos@CITI.UMICH.EDU
To: BUGTRAQ@SECURITYFOCUS.COM
In-Reply-To: Your message of "Mon, 22 Jan 2001 18:15:33 CDT."
<20010122231533.8105F207C3@citi.umich.edu>
> IPv6 is another case though. Here you have mandatory PMTU for all
> protocols.
This is a myth. It is quite possible to have a IPv6
implementation that does not require PMTU discovery. You
just fragment all your traffic at the network MTU. If fact
there are hooks in the BSD advansed API to allow you to do
this on a per socket basis.
DNS servers, for one, need to be able to disable PMTU on
the replies.
Mark
>
> Niels.
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews@nominum.com
