Open a Port in Windows Firewall
If Windows Firewall is blocking a program and you want to allow that program to communicate through the firewall, you can usually do that by selecting the program on the Exceptions tab in Windows Firewall.
P However, if the program is not listed on the Exceptions tab, you might need to open (add) a port. For example, to play a multiplayer game with friends online, you might need to open a port for the game so that the firewall allows the game information to reach your computer. Unlike an exception, which is only open during the time that it is needed, a port stays open all the time, so be sure to close ports that you do not need anymore.
Note: This information provided by Microsoft.