[26826] in bugtraq
Re: IPv4 mapped address considered harmful
daemon@ATHENA.MIT.EDU (itojun@iijlab.net)
Tue Aug 27 14:36:38 2002
To: Anthony DeRobertis <asd@suespammers.org>
In-reply-to: asd's message of 27 Aug 2002 03:20:16 -0400. <1030432816.12279.20.camel@bohr>
X-Template-Reply-To: itojun@itojun.org
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From: itojun@iijlab.net
Date: Tue, 27 Aug 2002 16:23:48 +0900
Message-Id: <20020827072348.5BEF64B22@coconut.itojun.org>
>> the problem is that some protocol proposal do not consider IPv4 mapped
>> address as "bogon" - they propose to actually use them in IPv6 traffic
>> on wire.
>They used to be bogons, so any currently existing bogon filters (e.g.,
>in firewalls) will drop them. Only remove them from your bogon filters
>when/if you decide you want them.
no specification (as far as i know) never defined IPv4 mapped address
to be bogons. IPv6 address architecture document is silent about it.
this is a part of the problem I would like to fix.
if you have any opposite evidence (specified as bogon), let me know.
itoun
