Cannot connect to games via WAN
I am using Steam version of the game.
OS: Windows 10 professional (64bit)
RAM: 16 gb
CPU: i7-7700k @4.2ghz
GPU: GTX 1080
When attempting to host game, error displays "The ports 27015 and 27016 are closed" I have covered the port forwarding sections of the forum. I have my machine in the DMZ so all ports should be forwarded. Just to cover all bases, these ports have also been manually forwarded. I have tested this on my mates PC and he has followed the same instructions and the same issue occurs. When direct connecting error reports: Connection Error. Connecting to the server failed!
When attempting to connect via LAN the game works fine.
Unsure how to proceed as the ports should all be forwarded however the game detects them as closed. In have other example games that work fine such as Killing Floor 2, which needed the machine to be in the DMZ/port forwarded to host online games. This has been tested and is working.
Please assist. Happy to provide further info. the log examples on your main bug-tracker page didn't seem pertinent as there is no crash or report being generated.