nanog mailing list archives

Re: IPv6 NAT


From: Paul Timmins <paul () timmins net>
Date: Sat, 01 Nov 2003 12:55:15 -0500


On Sat, 2003-11-01 at 12:33, Shawn Morris wrote:
Vonage's SIP implementation is not broken by NAT and in fact Vonage 
recommends that you purchase a SOHO router that does NAT.

Vonage also has a financial interest in ensuring you're unable to
connect using RTP and SIP to anyone else but them. The NAT router works
great for that. 
SIP server vendors (Cisco and Asterisk for a few) have made workarounds
so that the client can be behind NAT, provided it can only talk via the
SIP proxy on the server, it can't be instructed to talk peer-> peer with
another device via a SIP reinvite.

So put this one in the "Dirty hack that works out in the vendor's favor"
category.
-Paul

-- 
Paul Timmins <paul () timmins net>


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