IISGuard is a unique tool for monitoring, logging and analyzing requests to IIS.
IISGuard is a unique tool for remote monitoring, logging and analyzing requests in the Microsoft IIS web server. Now you can easily see all requests that are made to your IIS web server and find the sites and scripts that are causing problems. IISGuard improves the uptime of your server by eliminating problematic sites/scripts, detecting malicious clients and helping you improve the performance of IIS.
IISGuard 1.0 details 
