this is not something specifically targetting wine users, but it's a side effect of blizzard anti DDOS. There's a workaround some user posted in that thread tho
On Linux execute
$ echo net.ipv4.ip_default_ttl=128 | sudo tee /etc/sysctl.d/11-warcraft.conf
$ sudo sysctl -p
128 is the default TTL windows TCP stack uses (Linux default is 64 afaik) and this should allow you to connect without issues to WoW from your linux box
(depending on your distribution, you may need to restart your network manager, or reboot your computer in order to get the new settings applied)
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