TLS 1.2 SHA-2 Compliance

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Windows Version Support

PCI Council requires all merchants, vendors and processors to support TLS 1.2/SHA-2.

Windows XP, Server 2003, Vista, Server 2008 and below DO NOT SUPPORT TLS 1.2/SHA-2 and are NOT ALLOWED To be used in the payment processing environments
Windows 7 and Windows Server 2008 R2 have TLS 1.2/SHA-2 disabled by default.

The processors are discontinuing support for non TLS1.2 protocols. They are required to do so by the PCI council.
If you are getting Transmission Error after an upgrade, update your Windows to a PCI and TLS1.2/SHA2 compliant version. This is an industry mandated change. If you need help with this, please call 813-600-3225.

Windows 7 TLS 1.2 Setup

Windows 7 supports TLS 1.1 and TLS 1.2. However these protocol versions are not enabled on Windows 7 by default. 
On Windows 8 and higher the protocols are enabled by default. 
To enable TLS 1.1. and TLS 1.2 on Windows 7 add or change the following registry keys in Windows Registry Editor Version 5.00
Start the registry editor by clicking on Start and Run. Type in "regedit" into the Run field (without quotations).

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Client]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server]

Windows Server 2008 R2 Setup

By default, Windows Server 2008 R2 does not have this feature enabled.  This KB article will describe the process to enable this.
Start the registry editor by clicking on Start and Run. Type in "regedit" into the Run field (without quotations).

Highlight Computer at the top of the registry tree.  Backup the registry first by clicking on File and then on Export.  Select a file location to save the registry file.

Note: You will be editing the registry.  This could have detrimental effects on your computer if done incorrectly, so it is strongly advised to make a backup.

Browse to the following registry key:

Right click on the Protocols folder and select New and then Key from the drop-down menu. This will create new folder.  Rename this folder to TLS 1.2.

Right click on the TLS 1.2 key and add two new keys underneath it.

Rename the two new keys as:

Right click on the Client key and select New and then DWORD (32-bit) Value from the drop-down list.

Rename the DWORD to DisabledByDefault.

Right-click the name DisabledByDefault and select Modify... from the drop-down menu.

Ensure that the Value data field is set to 0 and the Base is Hexadecimal.  Click on OK.

Create another DWORD for the Client key as you did in Step 7.

Rename this second DWORD to Enabled.

Right-click the name Enabled and select Modify... from the drop-down menu.

Ensure that the Value data field is set to 1 and the Base is Hexadecimal. Click on OK.

Repeat steps 7 to 14 for the Server key (by creating two DWORDs, DisabledByDefault and Enabled, and their values underneath the Server key).

Reboot the server.
Your server should now support TLS 1.2.