The local SIP of my UCM port is standard 5060, so the Extensions are locally registered on the 5060,
based on the screen that I attach the remote extensions (without VPN) are registered on the 45060. (External HOST is deliberately hidden only in the picture).
My doubt is if I have to do the NAT on the firewall:
- 45060 external to 45060 of the UCM
- 45060 external to 5060 of the UCM
thanks to those who can help me.