[Asterisk-Users] SIP + NAT = horrible mess

[Jean-Michel Hiver]

Hi Guys,

After days of fiddling, I can't really get my SIP device to work 
communicate with Asterisk behind NAT. Sometimes the STUN server is 
flaky, sometimes the device isn't reachable if the connection is dropped 
and then put back on, sometimes it registers OK, sometimes it doesn't, etc.

I've come to the same conclusion as the wiki: it's probably better to 
avoid this horrible mess by either using IAX or doing VPN. Letting the 
IAX option aside, are you aware of any SIP devices that support some 
simple, easy to use VPN protocol?

Cheers,
Jean-Michel.