Configure to terminate TCP connections by TCP-RST packets

Outlook clients terminate the TCP connections by TCP-RST packets. To achieve this behavior with Airlock WAF, the expert setting described below must be configured.

Without this configuration, there is no noticeable impact except that the back-end server might log HTTP errors with status code 400.

Procedure-related prerequisites

  • ‚óŹ
    The previously described configuration steps have been carried out.


  • 1.
    Go to: Application Firewall >> Reverse Proxy.
  • 2.
    Edit the Outlook Anywhere Back-end Group.
  • 3.
    Change to the Expert Settings tab.
  • 4.
    Select ON to enable the Security Gate Expert Settings.
  • 5.
    Enter following Expert Settings:
  • BackendConnectionCloseByReset "TRUE"
  • The configuration has been updated successfully.