How can I open it and how can I edit the file so that it is still usable?
If I search on the internet for a .cfg file editor I didn't find anything usable.
I tried to edit it in Notepad or Wordpad it becomes unusable and if I use Free File Viewer I only can read it, but not editing.
Does anyone knows a good editor, so that the file is still usable after editing?
Request Filtering is a built-in security feature that was introduced
in Internet Information Services (IIS) 7.0, and replaces much of the
functionality that was available through the UrlScan add-on for IIS