The following table describes the default domain policy options available for Kerberos tickets. These policy settings are located in the Kerberos Policy node in Account Policies.
Security Policy Settings for Kerberos Ticket Policy
Security policy setting
Description
Enforce user logon restrictions
Determines whether the KDC validates every request for a session ticket by examining the user rights policy on the target computer. This option also serves as a means of ensuring that the requesting account is still valid and was not disabled since the Kerberos ticket was issued. This option could potentially slow down network logons.
Maximum lifetime for service ticket
Determines the amount of time a service ticket is available before it expires. This setting should be set the same as the user ticket setting, unless your users run jobs that are longer then their user tickets would allow.
Maximum lifetime for user ticket
Determines the amount of time a user ticket is available before it expires. This setting should be set according to the average amount of time a user logs on to a computer at your organization.
Maximum lifetime for user ticket renewal
Determines the number of days for which a user's TGT can be renewed. The default is seven days. Shortening this interval will increase security but put more load on the KDC.
Maximum tolerance for computer clock synchronization
Determines the maximum time difference (in minutes) between the time on the user's computer's clock and the time on the domain controller. Raising this value from the default of five minutes increases your vulnerability to replay attacks, in which encrypted credentials captured from the network are resubmitted by a malicious attacker. Lowering this value will increase the number of authentication failures caused by unsynchronized clocks.
Sunday, 9 September 2007
What are different group policies related to kerberos tickets?
Posted on 11:43 by Unknown
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