Your server must be online and accessible before you can add it to the lobby.

By adding your servers IP address and port below, you authorize the lobby to
ping your game's UDP port every 60 seconds for as long as your server is
online. After several failed ping attempts, the timespan between pings is
increased to hourly. After 1 day of failed attempts the server will be removed

Local IP Addresses are not accepted
Common LW Ports: 17478,21574,25670