Hello! I went back to the question, this time it is slightly different kind. And all the reasons Not able to play on LAN. Why? You ask. Probably because in version 16, which we used to play with my friend, the keys were not checked the master server, but now, when we bought on the key authentication to play the new version was not possible. For now to test the switch, you must have handy access to the Internet.
This is exactly what is our problem. USB modem does not guarantee that you will not lose connection after 5 minutes after it came into play. Fortunately, for the validation key this time is enough. But still, it does not solve the problem. After updating the list of local servers my friend still can not see my server in the empty box. For this reason, we had to install version 16 and play it.
Since I could not go to the router management page, then, accordingly, could not open closed my ISP ports, forcing us to play on LAN...
If you know the solution to this problem, please write it below
P.S. If anyone reading this, to doubt that we, as decent people, and bought each on a key, I can give you a BL ID me and my friend for confirming we as registered members