I'm trying to register an SX20 endpoint to the VCS-C using SIP TLS only. Endpoint is behind a firewall (Checkpoint), but I believe the necessary ports are open. If SIP Transport is set to TCP or UDP, it will register, but calls are not encrypted. If SIP Transport is set to Auto or TLS, it will not register. I have endpoints at other locations (behind other firewalls) that work fine with same rules in place. Any idea what I'm missing?
