No I can't :x I just can't imagine what other firewall can I have :X Router firewall is disabled completely, so is Ubuntu's firewall. Tried restarting router,server and client - no effect >.<
edit;
As seen on the screenshot I have nothing running in tray except Network manager,Keyboard preferences and Date/time
edit2:
I will try to fully expose the server station with virtual dmz now :x Hope this works -_-
edit3:
That seemed to fixed it O.o Really strange :x Sorry for the bother :X