[64760] in North American Network Operators' Group
Re: IPv6 NAT
daemon@ATHENA.MIT.EDU (Joe Abley)
Sat Nov 1 13:23:54 2003
In-Reply-To: <2147483647.1067679822@imac-en0.delong.sj.ca.us>
Cc: nanog@merit.edu, Shawn Morris <shawn@smorris.com>
From: Joe Abley <jabley@isc.org>
Date: Sat, 1 Nov 2003 13:23:15 -0500
To: Owen DeLong <owen@delong.com>
Errors-To: owner-nanog-outgoing@merit.edu
On 1 Nov 2003, at 12:43, Owen DeLong wrote:
> That probably means they are not using SIP, but, instead are using
> either H.323 or some other proprietary ugliness. That's unfortunate.
You can use SIP through a NAT, if you can hack the NAT to poke
particular ranges of ports back to devices on the internal network.
There's no useful way to use H.323 through a NAT though, at least that
I have seen working.
> SIP has to include the IP address of the RTP destination in it's
> payload.
> As such, you can't use SIP cleanly across NAT unless the NAT box knows
> to proxy the SIP and edit the payload (very messy).
Yeah, that's not actually the case.
Joe
