I have been unable to find this info myself so im going to post what i found.
U will wanna have these ports open
setup for both TCP and UDP. Some dont but its just easier and safer. BTW the dedicated server tool has bugs in it. the thing does not like to load the server after u start it. to test in console try one of the commands, skip map or something. if u get a message saying something like unknown command that means the server did not load. people say to open up 3 or more dedicated servers and than trying to launch one. under compatibility in windows under the properties for the dedicated server they say to turn off visual themes too. its still a game of luck. i got mine to launch after the 12th attempt with 4 windows open. THEY NEED TO FIX THIS YESTERDAY. I wonder if this also applies for creating ingame server. i have not had anyone join me in there yet so idk what ubisoft was thinking.