Was muling yesterday, maybe i was moving too fast, dunno, switching account again finally got me stuck at Checking versions with a further "Cannot connect" alert.
This leasts something like 24 hours already, looks like it's temp IP ban, that's what i found
Quote
Connection restrictions in Diablo II (2000) can be applied for behaviors such as:
Attempting to use an invalid CD-key
Attempting to use a hacked or modified game client to log in to Battle.net
Using unauthorized third-party programs or addons
Connecting to Battle.net using a business network, cloud hosting service, VPN, or Proxy
Rapidly connecting and disconnecting from Battle.net
Switching between accounts or characters too quickly
Leaving and joining games too quickly
Scrolling through skill selection too quickly using the mouse wheel
Repeatedly leaving an area and coming back to change shop or gambling items
Repeatedly using a spell with no cast delay such as Amplify Damage or Glacial Spike
Repeatedly using an incorrect password
Harassing other players
Advertising inappropriate website urls
Spamming text or chat commands such as /whisper or /whois
Connecting to Battle.net with more than 8 clients
Repeated login attempts after a restriction may extend the restriction.
If you find that your connection has been temporarily restricted, please remain offline for at least 48 hours. If after 48 hours you are still restricted, reinstall your game client or acquire a new IP address.