How to Enable TLS 1.1, TLS 1.2 on Windows Server 2008 R2 and IIS 7.5

Now a days there are a SSL vulnerability called POODLE discovered by Google team in SSLv3 protocol. So uses of SSLv3 is not secure to use. Now its recommended to use TLS 1.1 or TLS 1.2. This article will help you enable TLS security in Windows Server 2008 R2 or later versions by editing registry.

Step 1: Backup Registry Values

We strongly recommend to take a backup of registry before making any changes. Use below link to find steps to how to export registry values.

http://windows.microsoft.com/en-in/windows/back-up-registry

Step 2: Enable TLS 1.1 and TLS 1.2

2.1 Open registry on your server by running ‘regedit‘ in run window and navigate to below location.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols

2.2 Add the TLS 1.1 and TLS 1.2 keys under Protocols. It will looks like directories.

2.3 Now create two keys Client and Server under both TLS keys.

2.4 Now create the DWORD Values under Server and Client key as following

  DisabledByDefault [Value = 0]
  Enabled [Value = 1]

Step 3: Disable SSLv3 and Older Version

3.1 Open registry on your server by running ‘regedit’ in run window and navigate to below location.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols

3.2 Now change DWORD Values under Server and Client under SSLv3 and Older SSL version keys.

  DisabledByDefault [Value = 0]
  Enabled  [Value = 0]

After making all above setting reboot your server.