Using Asteirsk 13.28.1:

If I configure my pjsip transport to handle NAT from the Internet:

[transport-tcp]
type=transport protocol=tcp bind=10.75.22.8:5060
local_net=10.75.22.0/24
external_media_address=[external address redacted]
external_signaling_address=[external address redacted]

When a call comes from a TCP registered SIP client on the Internet, Asterisk is setting the IPv4 address in the “o=” and “c=” lines of the SDP ICE payload to “(null)”:

v=0
o=- 3654 548 IN IP4 (null)
s=Asterisk c=IN IP4 (null)

IPv4 addresses in all of the a= lines are still correct.

This “(null)” of course causes the caller to fail to complete the call.

Is there something more I have to do to have Asterisk/pjsip properly set the IPv4 address in the SDP ICE payloads?

Cheers, b.