Ryan Courtnage wrote:
With bindaddr = 0.0.0.0 and externip=<external IP> :
Contact: <sip:[EMAIL PROTECTED]>
OK, so the Asterisk server is not specifying the external IP in the SIP header, when it should be. This is probably because when the SIP INVITE arrives, it appears to be coming from a internal IP address (your port-forwarding firewall), instead of an external address. Granted, there are addresses within the SIP INVITE from the phone that are external, but the actual IP address that the INVITE arrives from will be internal.
With nat=yes in sip.conf for that SIP peer, Asterisk is going to ignore the IP address that the SIP client puts into the SIP header, and use the actual source IP address instead (this is what is needed when the SIP client is behind a NAT and does not know its own external address). I suspect you could solve this problem by removing nat=yes from sip.conf for this client, since you've eliminated the need for it by using port-forwarding.
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