Configuring your router's "Port Forwarding" for LAC's use without the LAC Server
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The vast majority of LAC users run their copy of LAC as a "client" in LAC's "Client/Server" mode, accessing other LAC players as other LAC clients through the LAC Server. This mode of operation supports as many as 10 simultaneous players in each of LAC's missions and in all of LAC's Realms.
However, if you don't have access to the LAC Server, you can configure for 2-player "PeerToPeer" mode, in which pairs of LAC players each act as a 2-player LAC Server to the other. Our "NETWORK H2H (2 PLAYERS)" mission is written specifically for this situation.
If you are doing this on your own LAN between 2 local computers both sharing the same LAN segment, you won't need to make any changes to your NAT router.
However, if you are accessing another LAC player in PeerToPeer mode that you access through your NAT router because the other player is somewhere out on the worldwide Internet, you will probably need to configure your own router for "Port Forwarding" (and the other player will need to do the same with his NAT router too).
We created a very basic YouTube "Playlist" comprising 5 short video clips that will give you clear information on all of this, with a commonsense, easily understandable introduction. You can watch all 5 of those clips in just a little over an hour, but the clip of most interest to this situation is the third on the list, entitled "NAT Routers Part 3: Port Forwarding by AskMisterWizard". Here's a direct link to just that clip:
https://www.youtube.com/watch?v=Aob-YTxiKGg&list=PL1IYes9MY6lKbhGd3P-gHA0M0KT9FC--M&index=4
If you are a beginner to router management, you may want to start the playlist from the beginning in order to benefit from the technology foundation it lays down, starting with the basics. Here's a link to the entire PlayList:
https://www.youtube.com/watch?v=XWqrhIV6WyM&list=PL1IYes9MY6lKbhGd3P-gHA0M0KT9FC--M
Last edit: bbosen 2026-03-25
After you watch those video clips about Port Forwarding, you will need to know that when configured in "PeerToPeer" mode, LAC always listens on UDP Port 51100 as if it were a very simple, 2-player LAC Server. Where the video clips refer to Server Processes "listening" on a numbered "Port", use "51100" in support of LAC's "PeerToPeer" mode.