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IISW-SV-000153: Web server must maintain the confidentiality of controlled information during transmission

An IIS 8.5 web server must maintain the confidentiality of controlled information during transmission through the use of an approved TLS version.
To check compliance with IISW-SV-000153, complete the following steps:
  1. Open the IIS 8.5 IIS Manager.
  2. Click the IIS 8.5 web server name.
  3. Access an administrator command prompt.
  4. Type 
    regedit<enter>
     to access the registry of the server.
  5. Navigate to the following registry paths:
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server
  6. Verify that 
    DisabledByDefault
     has a REG_DWORD value of 
    0
    .
  7. Navigate to the following registry paths:
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Server
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server
  8. Verify that 
    DisabledByDefault
     has a REG_DWORD value of 
    1
    .
If any of the listed registry paths do not exist or are configured with the incorrect value, your server is not compliant.
If your server is not compliant, complete the following steps:
  1. Open the IIS 8.5 IIS Manager.
  2. Click the IIS 8.5 web server name.
  3. Access an administrator command prompt.
  4. Type 
    regedit<enter>
     to access the registry of the server.
  5. Navigate to the following registry paths:
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server
  6. Set the 
    DisabledByDefault
     REG_DWORD value to 
    0
    .
  7. Navigate to the following registry paths:
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Server
    • HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server
  8. Set the 
    DisabledByDefault
     REG_DWORD value to 
    1
    .