[AusNOG] IPv4 Exhaustion

[Matthew Moyle-Croft]

On 01/08/2008, at 3:41 PM, Edwin Groothuis wrote:
>
> There are two reasons why SIP via NAT is a bad idea:
>
> - Indeed, the SDP packet has the IP address of the media termination
>  points in it. Which will give the famous one way audio if it
>  doesn't get through. STUN to the rescue? Re-invite to the rescue?

Session Border Controllers - we use Acme Packet (as do a number of  
others).   They massage SIP and make it work.
Brilliant pieces of work they are.    They get around all of these  
problems and solve NAT pin hole closing issues etc as well as all  
kinds of fixups as well as working as very clever firewalls to protect  
your softswitch.

MMC
-- 
Matthew Moyle-Croft Internode/Agile Peering and Core Networks
Level 4, 150 Grenfell Street, Adelaide, SA 5000 Australia
Email: mmc at internode.com.au    Web: http://www.on.net
Direct: +61-8-8228-2909		     Mobile: +61-419-900-366
Reception: +61-8-8228-2999        Fax: +61-8-8235-6909

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