Thanks for clarifications.
The PBX is certified by an SSL certificate, so i don’t use letsencrypt… in this case port 80 can stay closed, no?
The 5060 UDP can be opened only from IP of the ISP? Or it’s safe to be opened from any IP sorce?
10k-20k UDP can be opened only from IP of the ISP? Or it’s safe to be opened from any IP sorce?
OpenVPN is needed for? i don’t need to use that
To use Sangoma Connect use 5060 TCP as you said, must be opened from any IP source?
Thanks in advance!