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IIST-SI-000216: Set resource mappings

The IIS 10.0 website must have resource mappings set to disable the serving of certain file types. For request filtering, the ISSO must document and approve all scripts the website allows (white list) and denies (black list.) The white list and black list are compared to the request filtering in IIS 10.0. Request filtering at the site level takes precedence over request filtering at the server level.
To check compliance with IIST-SI-000216, complete the following steps for each site hosted on the IIS 10.0 web server:
  1. Open the IIS 10.0 Manager.
  2. Click the site name.
  3. Double-click
    Request Filtering
    >
    File Name Extensions Tab
    .
If any script file extensions from the black list are not denied, your application is not compliant.
If your application is not compliant, complete the following steps:
  1. Open the IIS 10.0 Manager.
  2. Click the site name.
  3. Double-click
    Request Filtering
    >
    File Name Extensions Tab
    >
    Deny File Name Extension
    .
  4. Add any script file extensions listed on the black list that are not listed.
  5. In the
    Actions
    pane, click
    Apply
    .