How Port Forwarding Works
With this evaluation, the 3CX Firewall Checker will send a port checker petition to the STUN server in the interface being assessed and asks that the STUN server create a link to the PBX in another IP address to the interface being assessed.
#portchecker #udpportchecker #udpportcheck
Web: https://openport.net/how-to-check-udp-port-status/