Finding out information about a server's Server Software and Operating System is the first goal of a cookbook hacker. Once armed with your system information, they're ready to seek hacking reciepes and other exploits by researching your sever on any number of hacking sites. Keeping such hacker useful information such as operating system and Web server usage and version is an important part of running a secure Web server.

ServerMask changes or obscures the identity of your IIS Web server by safely and easily removing or modifying the unnecessary Server header in HTTP responses. You can randomize Server Mask to choose amongst ten common Web servers, simply remove the header altogether, or create your own custom headers. You could change the header to any string you want and let the hackers try to figure it out. Check out the operating system listing for www.port80software.com at Net Craft. (www.netcraft.com). It's variable and customizable.

ServerMask is a fast, robust ISAPI filter that takes only minutes to install and configure.