Server has issues and can't login since this morning. Confirmed from 4 different accounts / PCs / Countries.
Actually, it isn't "down", but it's stuck at checking versions. Bnet log says logon acknowledged -> requesting lastest version -> disconnecting.
Any solution?

Same, just bought and can't connect (stuck on checking versions).

https://github.com/diasurgical/devilutionX
I recommend devilutionx, in latest beta you can use zerotier option in multiplayer selection menu - it doesn't require any port forwarding, you just give people the name/password and they can join (game list planned!)
bnet is kind of dead at this point

I know, but me and my friends don't want to fuss with this, we (like most of old school diablo players) want a full vanilla experience. And we don't play random people, just between ourselves. But I'll definitely check on this, looks like it's a fine piece of work.

Also, server is back up again!

I'm curious what you find to be a fuss about it (drop .exe in a folder and double click), and what you feel it changes compared to vanilla (not being able to duplicate?)