Problems with the connection. (Diablo 2)

A little update question! I talked with provider and they told me that on their side there are no problems (drove a lot of resources and it works), and the problem sort of began to appear more and less frequently ( every 2-3 days ), but since yesterday it is simply impossible to play on the server.
1. The connection to the server at 80% closed. ( connecting to fastest server / unnable to connect )
2. If you manage somehow to go, all I can do is sit in the chat, because every time I try to create a game / joining a game, the window with Diablo freezes for a few seconds and appears Failed to join the game. Well, the second option - connect to the server is successful, but then I see a message stating that my port 6112 is blocked (I even manually added a rule to D2, but nothing helps).
3. Re-did a trace and pinged rubattle saw the shock content! All packets lost, and the trace resembles a game of 90-ies.
Provider 100% says that the problem arises precisely from the rubattle.net

Administration, help! My LVL 99 crying for almost a week I can not spool 97 :(