When I attempt to host a Listen server, it doesn't show up in the Internet tab, and my friends cannot connect even with console commands and my ip. Tried sv_lan 0 and heartbeat, reinstalling, even re-enabling and disabling LAN. Tried ports 27015-27018 UDP and both TCP-UDP, nothing. Configured firewall, disabled it both in my pc and router to further test, nothing. Other games that require port forwarding work for me (like DOOM, I can host a server just fine) except this one. What could be the issue?