[Serusers] mediaproxy: Can I tell if two UAs are behind the same firewall?

[Java Rockx]

Hi All.

I'm using MediaProxy with ser-0.9.

Is there a way to test if a caller and callee are behind the same NAT
(assuming both are registred with my sip proxy)?

I'd like to not use mediaproxy for calls where the caller can directly
contact the callee.

Regards,
Paul