My Exchange 5.5 Server doing some illegal activities. Firewall log shows
that it tries to connect to some unknown Private Class C IP (While Our
network is using Private Class A IP addresses) and IP address 18.104.22.168 (none
of our node). Destination port is 4939, 4940, 4561, 1519 and 1528. Is this
normal or some kind of trojan ?