Multiplayer Neverwinter Nights on Local LAN

Neverwinter Nights requires each player in a local LAN game to own a copy of the game, if any of the clients have external Internet access. This requirement seems a little unreasonable for casual gaming. Luckily, a simple solution exists under Windows to disable server authentication. Simply edit the file:


and add the following lines to remap the Neverwinter Nights official servers to localhost:

Happy gaming!

6 thoughts on “Multiplayer Neverwinter Nights on Local LAN

  • February 11, 2007 at 7:44 am

    Unfortunately this doesn’t fix the problem. I still get an error saying that my CD-Key is already in use on that server.

  • May 22, 2007 at 3:57 pm

    You will still need different CD keys, but this does allow you to use normally blocked CD keys.

  • July 22, 2007 at 7:43 pm

    It worked for me. Just be sure you don’t add it into the part marked with # as a note, those lines are ignored.

  • October 10, 2007 at 11:23 am

    I tried this, and I can host a LAN game, but whenever my friend tries to join it says the CD Key is unauthorized. My friend tried making the game, which was successful, but then I get that error when I join. We are using different keys. I put in the changes listed above, but this is as far as I can get. any ideas?

  • November 2, 2007 at 6:36 pm

    Make sure you do it to BOTH computers!

  • May 14, 2010 at 12:46 pm

    I am well aware that this post is years old now, but I appreciate this a great deal. You guys helped turn a frustrating horror fest for us D&D nerds into an enjoyable afternoon of gaming.

    Thanks a bunch.

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