Subject: [Mip6] [issue76] altCoA should not be used when traversing IPv4 NAT

From: Pascal Thubert <[email-masked]>
Date: Fri, 30 Jun 2006 09:08:45 +0000

New submission from Pascal Thubert <[email-masked]>:

The draft implicitly reuses altCoA as specified in RFC 3775.

As a result, in an IPv4 NAT traversal situation, the altCoA option will be
present with the mapped address containing the IPv4 address on the MN side of
the NAT.

And the HA will use that address as opposed to the source of the packet to
respond, as mandated by MIP6.

We need to make sure that the HA answers to the IPv4 address that is found as
source of the BU regardless of the altCoA option. 

It might be better to completely omit the option in an IPv4 traversal situation.

----------
category: Technical
draft: draft-ietf-mip6-nemo-v4traversal
messages: 253
nosy: pthubert
priority: Should fix
status: Pending
title: altCoA should not be used when traversing IPv4 NAT

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