Wit's end has been reached. I cannot for the life of me figure out why any rF2 server I start is not visible by external clients or myself with the loopback adapter installed and running. This problem began some time in December, not sure of the exact date. Not ruling out a Windows update, but why are PCs with every update installed (up to today) able to host and mine not? - Running the current rF2 build of 1117. - The correct ports are forwarded. 54297 TCP + UDP, 64297 TCP, 64298 UDP, and 64299 UDP. - The router is an Asus RT-N300 with the latest firmware. - The hosting PC is hardwired (ethernet) into the router. - rFactor 2 is allowed through Windows Defender (and yes, I have tried it with the firewall turned off). - A call to my internet provider revealed a sufficient signal and no restrictions whatsoever placed on hosting. - My VPN is ALWAYS turned OFF before any hosting begins. Thanks to all whom respond in advance.