To block specified HTTP extensions

  1. In the console tree of ISA Server Management, click Firewall Policy.
  2. In the details pane, click the applicable access rule or Web publishing rule.
  3. On the Tasks tab, click Edit Selected Rule.
  4. On the Traffic tab (for Web publishing rules) or on the Protocols tab (for access rules), click Filtering, and then click Configure HTTP.
  5. On the Extensions tab, select one of the following:
  6. If you selected Allow only specified extensions or Block specified extensions (allow all others), click Add, and then type the HTTP extension in Extension.
  7. Select Block requests containing ambiguous extensions if requests whose file extension cannot be determined should also be blocked.



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