This is not the latest version of the STIG. This is provided for archival purposes. See the latest STIG.
An IIS 10.0 web server must maintain the confidentiality of controlled information during transmission through the use of an approved Transport Layer Security (TLS) version.
TLS encryption is a required security setting for a private web server. Encryption of private information is essential to ensuring data confidentiality. If private information is not encrypted, it can be intercepted and easily read by an unauthorized party. A private web server must use a FIPS 140-2-approved TLS version, and all non-FIPS-approved SSL versions must be disabled.
NIST SP 800-52 specifies the preferred configurations for government systems.
Check
Access the IIS 10.0 Web Server.
Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server
Verify a REG_DWORD value of "0" for "DisabledByDefault". Verify a REG_DWORD value of "1" for "Enabled".
Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server
Verify a REG_DWORD value of "1" for "DisabledByDefault". Verify a REG_DWORD value of "0" for "Enabled".
If any of the respective registry paths do not exist or are configured with the wrong value, this is a finding.
Fix
Access the IIS 10.0 Web Server.
Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server
Create a REG_DWORD named "DisabledByDefault" with a value of "0". Create a REG_DWORD named "Enabled" with a value of "1".
Navigate to: HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 2.0\Server HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\SSL 3.0\Server
For each protocol: Create a REG_DWORD named "DisabledByDefault" with a value of "1". Create a REG_DWORD named "Enabled" with a value of "0".