Disable SSLv2 on IIS 6 for Windows 2003

SSLv2 should be disabled on any machine running IIS as a security precaution. To do this, open a command prompt on the target server and run the following commands to add values to the registry to disable it.

REG ADD “HKLM\System\CurrentControlSet\Control\SecurityProviders\SChannel\Protocols\PCT 1.0\Server” /v Enabled /t REG_DWORD /d 0 /f

REG ADD “HKLM\System\CurrentControlSet\Control\SecurityProviders\SChannel\Protocols\SSL 2.0\Server” /v Enabled /t REG_DWORD /d 0 /f

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