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MICROSOFT IIS: HOW TO DISABLE THE SSL V3 PROTOCOL

  1. Open the Registry Editor and run it as administrator.For example, in Windows 2012 or 2008r2:
    1. On the Start screen type regedit.exe.
    2. Right-click on regedit.exe and click Run as administrator.
  2. In the Registry Editor window, go to:HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSecurityProvidersSchannelProtocols
  3. In the navigation tree, right-click on Protocols, and in the pop-up menu, click New > Key.
  4. Name the key, SSL 3.0.
  5. In the navigation tree, right-click on the new SSL 3.0 key that you just created, and in the pop-up menu, click New > Key.
  6. Name the key, Client.
  7. In the navigation tree, right-click on the new SSL 3.0 key again, and in the pop-up menu, click New > Key.
  8. Name the key, Server.
  9. In the navigation tree, under SSL 3.0, right-click on Client, and in the pop-up menu, click New > DWORD (32-bit) Value.
  10. Name the value DisabledByDefault.
  11. In the navigation tree, under SSL 3.0, select Client and then, in the right pane, double-click the DisabledByDefault DWORD value.
  12. In the Edit DWORD (32-bit) Value window, in the Value Data box change the value to 1 and then, click OK.
  13. In the navigation tree, under SSL 3.0, right-click on Server, and in the pop-up menu, click New > DWORD (32-bit) Value.
  14. Name the value Enabled.
  15. In the navigation tree, under SSL 3.0, select Server and then, in the right pane, double-click the Enabled DWORD value.
  16. In the Edit DWORD (32-bit) Value window, in the Value Data box leave the value at 0 and then, click OK.
  17. Restart the server.
  18. You have successfully disabled the SSL v3 protocol.

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