The MetaCompress ISAPI filter can be configured with the help of the Filter Settings utility. The MetaCompress filter can update the modified configuration. Therefore, you don't need to reload IIS after saving the changes.
The MetaCompress settings are divided into three groups: Filter configuration, IIS configuration, and Content types.
Filter configuration
Enable compression via HTTP/1.0:
This checkbox enables compression if the client request has been sent via the protocol HTTP/1.0. Some old proxy servers have some problems with compressed content. By default, this checkbox is not selected.
Compress streaming content:
This option allows you to compress streaming content, such as SHTML, SHTM, and STM. These pages have no "Content-size" header in their response.
Enable logging:
If you enable logging, you can do a quick analysis of log files when you click the "Log file analysis" button.
Path to log files:
The names of log files depend on the current date and the type of log. Therefore, you should specify the folder log files will be saved to. If you want to keep log files, you must grant Internet Guest Account for your server the write access to this folder. Usually Internet Guest Account is named IUSR_<computer_name>. For Windows 2003 Server, you must grant "NETWORK SERVICE" the write access to the log folder. Also, you can grant "Everyone" the write access to the log folder.
Log type:
There are four types: Hourly, Daily, Weekly, and Monthly
Content types
On this tab you can define content types you want to compress.
This tab is divided into two lists: "Enable compression for …" and "Disable compression for …". MetaCompress will compress all pages present in the first list and absent in the second.
For example: you can enable compression for text/* and disable it for text/xml. In this case MetaCompress will pack any text content except text/xml.
Note: there is no point in compressing image/* content, because all image types are packed very badly with the gzip algorithm.
IIS configuration
Choose Web site:
You can select the web site on your web server where you want to set up the MetaCompress filter. This parameter works only during the filter installation operation.
Install filter:
The setup program installs the MetaCompress filter onto the selected web site, if possible.
Uninstall filter
The program uninstalls the MetaCompress filter from all web sites on your IIS.