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| <# | ||
| From the dirteam blog - the things that are better left unspoken | ||
| HOWTO: Disable weak protocols, cipher suites and hashing algorithms on Web Application Proxies, AD FS Servers and | ||
| Windows Servers running Azure AD Connect [(or anything!)] | ||
| 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/ | ||
| #> | ||
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| # Enable TLS 1.2 | ||
| $SChannelRegPath = "HKLM:\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols" | ||
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| New-Item $SChannelRegPath"\TLS 1.2\Server" -Force | ||
| New-Item $SChannelRegPath"\TLS 1.2\Client" -Force | ||
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| New-ItemProperty -Path $SChannelRegPath"\TLS 1.2\Server" -Name Enabled -Value 1 -PropertyType DWORD | ||
| New-ItemProperty -Path $SChannelRegPath"\TLS 1.2\Server" -Name DisabledByDefault -Value 0 -PropertyType DWORD | ||
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| New-ItemProperty -Path $SChannelRegPath"\TLS 1.2\Client" -Name Enabled -Value 1 -PropertyType DWORD | ||
| New-ItemProperty -Path $SChannelRegPath"\TLS 1.2\Client" -Name DisabledByDefault -Value 0 -PropertyType DWORD | ||
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| # Note: The DisabledByDefault registry value doesn't mean that the protocol is disabled by default. It means the protocol is not advertised as available by default during negotiations, but is available if specifically requested. | ||
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| # Configure .NET Applications to Use TLS 1.1 and TLS 1.2 | ||
| $DotNET4WoWPath = "HKLM:\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\v4.0.30319" | ||
| New-ItemProperty -Path $DotNET4WoWPath -Name SystemDefaultTlsVersions -Value 1 -PropertyType DWORD | ||
| New-ItemProperty -Path $DotNET4WoWPath -Name SchUseStrongCrypto -Value 1 -PropertyType DWORD | ||
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| $DotNET4Path = "HKLM:\SOFTWARE\Microsoft\.NETFramework\v4.0.30319" | ||
| New-ItemProperty -Path $DotNET4Path -Name SystemDefaultTlsVersions -Value 1 -PropertyType DWORD | ||
| New-ItemProperty -Path $DotNET4Path -Name SchUseStrongCrypto -Value 1 -PropertyType DWORD | ||
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| # Disable TLS 1.0 and TLS 1.1 | ||
| New-Item $SChannelRegPath -Name "TLS 1.0" | ||
| New-Item $SChannelRegPath"\TLS 1.0" -Name SERVER | ||
| New-ItemProperty -Path $SChannelRegPath"\TLS 1.0\SERVER" -Name Enabled -Value 0 -PropertyType DWORD | ||
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| New-Item $SChannelRegPath"\TLS 1.1\Server" -Force | ||
| New-ItemProperty -Path $SChannelRegPath"\TLS 1.1\Server" -Name Enabled -Value 0 -PropertyType DWORD | ||
| New-ItemProperty -Path $SChannelRegPath"\TLS 1.1\Server" -Name DisabledByDefault -Value 0 -PropertyType DWORD | ||
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| New-Item $SChannelRegPath"\TLS 1.1\Client" -Force | ||
| New-ItemProperty -Path $SChannelRegPath"\TLS 1.1\Client" -Name Enabled -Value 0 -PropertyType DWORD | ||
| New-ItemProperty -Path $SChannelRegPath"\TLS 1.1\Client" -Name DisabledByDefault -Value 0 -PropertyType DWORD | ||
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| # Prompt to reboot the server now or later? | ||
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| # Show TLS Cipher Suites | ||
| Get-TlsCipherSuite | Format-Table Name | ||
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| # Disable Weak Cipher Suites and Algorithm Hashes on Windows Server 2016 | ||
| 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_RSA_WITH_3DES_EDE_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_RC4_128_SHA" | ||
| Disable-TlsCipherSuite -Name "TLS_RSA_WITH_RC4_128_MD5" | ||
| 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" |