VPN software allows for LAN to be "extended" so to speak, over the internet, thus convincing the parties involved that they are connected via conventional LAN protocol/hardware, whether via a 8P8C modular connector, or whatever else it may be, (heck firewire even >.>)
UA our authentic classic I have had the joy of playing with members here via the VPN software Hamachi.
If I am to be honest, when I discovered hamachi I was thankful. Hamachi offers a free derivative of their product. However I soon found it be be frustratingly slow. I kept on getting "relayed tunnel" error messages, my transfer rates dwindled and latency was ever a bane. I speak of course of their FREE PRODUCT, their paid service I gather, elicit their best servers/speeds.
So I sat about discover an alternative, a free and BETTER alternative.
Wippien was the answer found. It was free, it was concentric, customizable and best of all, I found it be FASTER. Its available for windows and linux.
At the time, the best DL speeds I could get with my internet where about 400kbps. I mention this so to provide a benchmark/background. Wippien provided me with transfers that fluctuated between 50/60 kbps, but it was constantly in that ballpark. That for me, was leagues better, than the 5/6kbps I sometimes got when trying to game/share small files with friends over Hamachi! If you've been a free hamachi user, Give me a silent nod if you feel me on that one.
I recommend that the lovely folks in our community try out this great little program.
It works behind NAT, has a list of PCs/Users, File Transfer to a friend is simple and automated (multiple such transfers are supported at any one time) and on top of everything has a small data footprint.
We can use it as the standard for our online UA matches / skirmishes and I think this should contribute to the livelihood of Stoudson's Forums.
.But if Urban Assault were to have a Starcraft-like, or CounterStrike-like Multiplayer (without conexion problems, and with chances to track active and inactive "Friends" and "Rivals"), it could be even better.