Lan internet

This setting specifies whether you are running a LAN- or Internet-visible game server. An Internet-visible game will be advertised on the master server browser, allowing online players to join your game easily. Note that, even if you set the game to LAN-only, online players will still be able to join if it is possible to reach Server port from the Internet, by adding it manually to their personal server lists.

The setting of lan_internet can be set to:

Note that the setting Server advertise also affects advertising to the master server list.