megafrom

You must activate the port you use as UDP on your modem and of course allow it from the firewall.

Do you mean This 

Go to Network - NAT / PAT settings on your modem, then add the port number you want to use to the empty places, then set the firewal settings on your modem and check if the port is open if the saddle is not open, you succeed, check the forum, information about this has been shared