Are you sure your server is using the 27015 port? Or the 7777 port?
It might be using one above it.
Setup TCPView on the pc running the server and use it to check what ports are used.
I solved it,
issue was Oracle VirtualBox Host-Only Ethernet Adapter,
it changed internal IP somehow so listen server was not running on 192.168.1.100:7777 but on 192.168.56.1:7777 instead and when I was forwarding ports on 192.168.56.1 I actually couldn’t my router ended with error so I forwared those on 192.168.1.100 which actually had no meaning…
so I need to turn off Oracle VirtualBox Host-Only Ethernet Adapter in network settings and then listen server runs ok on 192.168.1.100
but anyway it still didn’t work for me, I have cable modem with integrated router and behind it another router, which I use for my wifi and with all settings for forwarding listen server was not visible
so my workaround was to enable wifi in modem, I created special network for chivalry gaming SSID CMWnet :D in cable modem and there forwarded ports now my PC was 192.168.0.10 and then it worked
also some random dude joined my listen server so I am very happy everything works fine and I can play and host any custom map any custom mode
Internet IP is 18.104.22.168:7777
and LAN IP is 192.168.0.10:7777
(btw I run my listen server just from ingame menu and I don’t need any cmd scripts or what just start game then create game and that’s all, I can’t login as admin but I don’t need it anyway)
Thank you very much Raizio for quick response :)