go to technical support forum section and bump my comment
Blizzard only takes things seriously if many people report them
Blizzard most likely changed something in network or security configuration on Friday, and now many people from various internet providers are having problems with connecting to some Blizzard services.
its saturday night / sunday morning they are not here
I am reporting problem to them from Friday
they just ignore it, as usual, when few people report problems
and this time they will have fire, because nowadays people just do not report problems when they have them, and problem is 99.5% in blizzard network configuration
people are just getting angry enough to report it now
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Reading the tech thread people are reporting issues from ‘Northern Poland’. Some one also said it’s working from using their mobile. My first step would be to contacting your ISP it seems it’s their routing.