I guess you're using the standalone version of the game (from our homepage)? Our IP isn't served by a CDN so it will not change in the medium run (unless we move to a different hoster, but that's pretty unlikely)
The autoupdate also uses the same IP, there are no other IPs involved in this process. Does autoupdate work in your case? In order to find out if it really works, you could delete a random file in the data folder (e.g. the "commons.jar") and run the game. If the client is able to download the missing file, everything should be fine
Thanks for the prompt reply . Yes we use both the standalone version of the game (from your homepage). (I bought the 2 games directly from your online store because I see no reason that you have to pay a market cut to Steam and I like much more that all the money go to you the Devs. )
Ok it seems that all works round and smooth. I have just done the test you suggested and the client was able to download again the commons.jar! Great!
Again thank you. See you.