Windows Server 2016 - IIS - disable TLS 1.0 and 1.1, and weak encryption

TLS 1.0 and TLS 1.1 should be disabled after 2016.  Below is the registry to modify the related registry:


[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.0\Server] "Enabled"=dword:00000000 "DisabledByDefault"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server] "Enabled"=dword:00000000 "DisabledByDefault"=dword:00000001


Disable obsolete encryption standards by PowerShell script:

Disable-TlsCipherSuite -Name “TLS_RSA_WITH_3DES_EDE_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_RC4_128_SHA“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_RC4_128_MD5“

Disable-TlsCipherSuite -Name “TLS_DHE_RSA_WITH_AES_256_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_DHE_RSA_WITH_AES_128_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_AES_256_GCM_SHA384“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_AES_128_GCM_SHA256“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_AES_256_CBC_SHA256“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_AES_128_CBC_SHA256“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_AES_256_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_AES_128_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_DHE_DSS_WITH_AES_256_CBC_SHA256“
Disable-TlsCipherSuite -Name “TLS_DHE_DSS_WITH_AES_128_CBC_SHA256“
Disable-TlsCipherSuite -Name “TLS_DHE_DSS_WITH_AES_256_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_DHE_DSS_WITH_AES_128_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_DHE_DSS_WITH_3DES_EDE_CBC_SHA“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_NULL_SHA256“
Disable-TlsCipherSuite -Name “TLS_RSA_WITH_NULL_SHA“
Disable-TlsCipherSuite -Name “TLS_PSK_WITH_AES_256_GCM_SHA384“
Disable-TlsCipherSuite -Name “TLS_PSK_WITH_AES_128_GCM_SHA256“
Disable-TlsCipherSuite -Name “TLS_PSK_WITH_AES_256_CBC_SHA384“
Disable-TlsCipherSuite -Name “TLS_PSK_WITH_AES_128_CBC_SHA256“
Disable-TlsCipherSuite -Name “TLS_PSK_WITH_NULL_SHA384“
Disable-TlsCipherSuite -Name “TLS_PSK_WITH_NULL_SHA256“

Disable-TlsCipherSuite -Name "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA"
Disable-TlsCipherSuite -Name "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA"

Disable-TlsCipherSuite -Name "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256"
## Disable-TlsCipherSuite -Name "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384"


Please reboot your server afterward.

You may need to use online tools to verify:

https://www.ssllabs.com/ssltest/analyze.html

Reference:
https://dirteam.com/sander/2019/07/30/howto-disable-weak-protocols-cipher-suites-and-hashing-algorithms-on-web-application-proxies-ad-fs-servers-and-windows-servers-running-azure-ad-connect/