[messages] [Module Support] How do I set up Peer-to-Peer connection

rdmorss rdmorss at morssweb.com
Mon May 16 20:10:08 CEST 2016

Mike, Are you trying to play over the internet? If so, then
_each_player_ needs to configure his internet gateway router to direct
incoming traffic on port 5050 to the LAN IP of the machine running

First each player needs to know the LAN IP address of the computer
running VASSAL, and you also need the IP address of the Default Gateway.

Open a Command Prompt and type __ipconfig__
Remember the IP address and Default Gateway that are shown.
Let's say, for example, it reports a LAN IP of and a
Default Gateway of

Open a web browser and type (your default gateway) in the
address bar. Then log in to your router.

In the "port forwarding" configuration set it to send all traffic on
port 5050 to (your VASSAL machine's LAN IP). Save that

Each player should also know his current WAN IP address (the IP address
of your router as seen from the internet). 
Just go to __whatismyip.com__ and it will be displayed.

At this point the players should be able to follow the instructions on
pages 8 and 9 of the VASSAL userguide "Launching a game" knowing that
any invitations should go to the WAN IP of the other player (not the LAN

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