Windows Firewall Log Analyser is a free utility that will read and analyse your native Windows (XP, Vista or Win 7) Firewall Log. It will quickly show you what protocol, port and source host is the most active on your network in terms of blocked packets. Using the WinFirewallLogAnalyser can help you to rapidly track down the source of malware or noisy network applications, and help you optimise your home or corporate network. The tool comes with its own built-in database of known protocols and services, along with suggestions for commonly seen services.
Windows Server 2008