PJSIP NAT Traversal.

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I have two servers running pjsip they are both on NAT. The proxy has a static public address. I set the ;external_media_address and
;external_signaling_address to the actual IP address in the transport section on the proxy.

The issue I am having is on the server with only a dynamic IP address. I
can not figure out how to get ice support working so the public ip address is written into the registration.. The nat dynamic server is trying to register to the proxy.

One issue I am seeing is only the private IP address are showing in the contact table on the proxies contact record.

What could I be missing?