[Serusers] STUN server

[Klaus Darilion]

m36828253-1 at imap.1and1.com wrote:

> - Make sure you are not behind a Symmetric NAT. If so, you're dead. STUN
> does not work with Symmetric NAT.
> 
> If a UA is behind Symmetric NAT, and
> UA use STUN, and
> SER have [RTP/Media]Proxy to handle Symmetric NAT,
> this UA should be fine, right?

The UA will use STUN to detect the NAT type. In case of symmetric NAT it 
must not write public IP addresses into the SIP messages. Thus, ser can 
detect that the client needs NAT traversal and enforces nathelper/rtpproxy.

regards,
klaus