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Configuring CMC For Single Sign-On Or Smart Card Login
This section provides information to configure CMC for Smart Card login and Single Sign-On (SSO) login
for Active Directory users.
SSO uses Kerberos as an authentication method allowing users, who have signed in as an automatic- or
single sign-on to subsequent applications such as Exchange. For single sign-on login, CMC uses the
client system’s credentials, which are cached by the operating system after you log in using a valid Active
Directory account.
Two-factor-authentication, provides a higher-level of security by requiring users to have a password or
PIN, and a physical card containing a private key or digital certificate. Kerberos uses this two-factor
authentication mechanism allowing systems to prove their authenticity.
NOTE: Selecting a login method does not set policy attributes with respect to other login interfaces,
for example, SSH. You must set other policy attributes for other login interfaces also. If you want to
disable all other login interfaces, navigate to the Services page and disable all (or some) the login
interfaces.
Microsoft Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows 7, and Windows
Server 2008 can use Kerberos as the authentication mechanism for SSO and smart card login.
For information about Kerberos, see the Microsoft Website.

System Requirements

To use the Kerberos authentication, the network must include:
• DNS server
• Microsoft Active Directory Server
NOTE: If you are using Active Directory on Microsoft Windows 2003, make sure that you have
the latest service packs and patched installed on the client system. If you are using Active
Directory on Microsoft Windows 2008, make sure that you have installed SP1 along with the
following hot fixes:
Windows6.0-KB951191-x86.msu for the KTPASS utility. Without this patch the utility generates
bad keytab files.
Windows6.0-KB957072-x86.msu for using GSS_API and SSL transactions during an LDAP bind.
• Kerberos Key Distribution Center (packaged with the Active Directory Server software).
• DHCP server (recommended).
• The DNS server reverse zone must have an entry for the Active Directory server and CMC.
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