I downloaded a Steam game to play and in order to host a server I need port 27015 UDP opened. For reference I have tried this on both the latest .979 firmware, a older .720 firmware, and Merlin's newest .35 firmware. I did a factory reset in between each firmware and several reboots of the router. Below is how I added the port number.
In addition I have disabled the router firewall and added an exception in the Windows firewall to allow both private and public IP's to connect to the game. Problem is the port is still not open. I downloaded a port checker tool and it tells me that 27105 UDP is closed. My friends cannot join my private server as it tells them the server is not responding?
Could this be a hardware related issue?

In addition I have disabled the router firewall and added an exception in the Windows firewall to allow both private and public IP's to connect to the game. Problem is the port is still not open. I downloaded a port checker tool and it tells me that 27105 UDP is closed. My friends cannot join my private server as it tells them the server is not responding?
Could this be a hardware related issue?