Is the server window, Linux sun?
If it’s a SUN server just use snoop. Type snoop at the command prompt and it will show you the packets as they pass through the server. Use grep to narrow things down a bit.
If it’s a Linux box use tcpdump at the command prompt
If it’s a windows server use wireshark – install Wireshark and run it. You’ll see all connection hitting the server. In the options of the packet capture set it to promiscuous mode