I copied this from DFReloaded.
I think it's what your looking for.
|In the event such as the Novalogic Servers being unavailable for game play you can use other software programs to play across the LAN.|
Please note that DFX2 cannot be played as it requires you to login for LAN play..
COMODO have a free download for EasyVPN
Easily create virtual private networks
Gain 'remote access' to your PCs
Securely chat with multiple users
Set up a multi-player gaming session
Share files, photos, and more
I use EasyVPN on DFReload Server 1 with good results -
Wippien is for
Easy gaming. . Easy file sharing. . Easy chatting. . with your real buddies!
I believe this is used by the guys at Advanced Warfare
LogMeIn HamachiÂ² is free for non-commercial use. With LogMeIn HamachiÂ², you can:
â¢Securely connect your computers over the Internet
â¢Quickly and easily create virtual networks that only you can access
â¢Avoid the hassle and headaches of modifying firewalls or network routers
Found this to be a bit taxing when setting it up
There is possibly more software available but I will stay with the ones above.