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Disable SSLv2 and SSLv3 protocols on Microsoft IIS and windows Server

Disable SSLv2 and SSLv3

Automatic method

Disable SSLv2

  • Download the file disableSSLv2.reg.
  • Save the file disableSSLv2.reg on your server.
  • Doucle-click on disableSSLv2.reg
  • SSLv2 protocol is now disabled.
  • You can now check that the protocol has correctly been disable with our tool Copibot.

Disable SSLv3

  • Download the file disableSSLv3.reg.
  • Save the file disableSSLv3.reg on your server.
  • Doucle-click on disableSSLv3.reg
  • SSLv3 protocol is now disabled.
  • You can now check that the protocol has correctly been disable with our tool Copibot.

Manual method

  • Launch regedit from the Run tool of Windows available via the Run menu or the keyboard shortcut Win+r
    regedit launch
  • Access your key in the dropdown list at the left hand side of your screen (key) HKey_Local_Machine\System\CurrentControlSet\Control\SecurityProviders \SCHANNEL\Protocols. Then access the SSL 2.0 sub-key. If it doesn't exist you will have to create it with a right-click on the parent key, here Protocols. Keys and values are case-sensitive.
    Register key creation
  • Then select the Serversub-key (case-sensitive, create it if it does not exist). Right-click on the right side of the window and select the sub-menu New - DWORD (32 bit) Value.
    Register value creation
    Name it Enabled (case-sensitive) and give it the value 00000000 (it is the default value).
    Enabled value to 0 for SSLv3
  • Repete the operation with the SSL 3.0 key (case-sensitive).
    Enabled value to 0 for SSLv3
  • Relaunch your server.
  • You can now check that the protocols have correctly been disable with our tool Copibot.

External links

  • Microsoft knowledge base: Please note, the French version also translate the register keys that could to handling errors. We advise to consult the English version of this page.
  • IIS Crypto: Tool developed by Nartac that allows you to customize protocol and cipher support on Windows.