Customizing the File Types IIS Compresses (IIS 6.0)
You can customize the file types IIS compresses. Enabling static file compression compresses .htm, .html, and .txt files. Enabling dynamic compression compresses .asp, .dll, and .exe files.
You must be a member of the Administrators group on the local computer to run scripts and executables. As a security best practice, log on to your computer by using an account that is not in the Administrators group, and then use the runas command to run your script or executable as an administrator. At a command prompt, type runas /profile /user:MyComputer\Administratorcmd to open a command window with administrator rights and then type cscript.exeScriptName (include the script's full path and any parameters).
To add one or more file types to the server-wide static compression configuration
To remove one or more file types from the server-wide static compression configuration, repeat the previous two commands, leaving out the file type you want to remove.
To add one or more file types to the server-wide dynamic compression configuration
To remove one or more file types from the server-wide dynamic compression configuration, repeat the previous two commands, leaving out the file type you want to remove.
For a detailed discussion of how HTTP compression works, how to test compression, and detailed compression configuration options, see Using HTTP Compression for Faster Downloads.
For more information about improving the performance of IIS network resources using related features like bandwidth throttling and connection timeouts, see Administering Network Resources.