Client keeps disconnecting (An unexpected disconnection has occured)

I know this is an old thread, but I've struggled with this issue for a couple of days, and think I've found a sollution that works (At least so far it works)

I've allowed the CLIENT.EXE through my windows firewall instead of the PathOfExiles.EXE. So far it is working like a charm.
Just thought others might be facing the same issue :)

Kind regards
From Sceecee