https://bugs.winehq.org/show_bug.cgi?id=48696
--- Comment #3 from bugzilla@biechl.net --- Unfortunately it's not an IPv6 issue. I tested again with IPv6 enabled and it does not make a difference. I have also looked into the network packages and could not find much (because most of it is encrypted), besides one of the remote hosts closing the connection due to an error (the exact error code is encrypted unfortunately).
Since it looked like it might be a certificate chain validation error to me, I've tried to run it with a modified version of wine that always returns true (0) when validating a certificate chain, but that didn't help either. (dlls/crypt32/chain.c - CertVerifyCertificateChainPolicy)
I'm pretty much stuck.
Ah one thing to mention about my log: I did have enabled various overrides when doing the log, hoping some of them would fix the issue. Without these, there were different errors, but the result, no multiplayer, has been the same. These are my overrides:
d3dx11_42 d3dx11_43 d3dx9 d3dx10 win7 winhttp msasn1 crypt32 iertutil wininet