Trying to figure out a way to do this:
netsh advfirewall firewall add rule name="ES 9500 (Block)" dir=in action=block protocol=TCP localport=9500
netsh advfirewall firewall add rule name="ES 9500 (Allow)" dir=in action=allow protocol=TCP localport=9500 remoteip=184.108.40.206
Doesn't seem that it's possible as "Override block rules" requires specifying specific machines: http://technet.microsoft.com/de-de/library/dd734783(v=ws.10).aspx.
Any way to do this on Windows?