[128747] in North American Network Operators' Group
Re: BCP38 exceptions for RFC1918 space
daemon@ATHENA.MIT.EDU (Randy Bush)
Sun Aug 15 14:05:13 2010
Date: Mon, 16 Aug 2010 03:05:04 +0900
From: Randy Bush <randy@psg.com>
To: Florian Weimer <fw@deneb.enyo.de>
In-Reply-To: <87vd7bg8em.fsf@mid.deneb.enyo.de>
Cc: nanog@merit.edu
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> What's the current consensus on exempting private network space from
> source address validation? Is it recommended? Discouraged?
>
> (One argument in favor of exceptions is that it makes PMTUD work if
> transfer networks use private address space.)
and this is a good thing?
rfc1918 packets are not supposed to reach the public internet. once you
start accommodating their doing so, the downward slope gets pretty steep
and does not end in a nice place.
randy
