How long ticket get valid once KDC allocated?
The validity period of a Kerberos ticket is determined by the Kerberos policy settings in the network environment. When a Kerberos ticket is issued, it has a specific lifetime, which is set by the Key Distribution Center (KDC) that issued the ticket. The lifetime of a Kerberos ticket is typically configured as part of the Kerberos policy settings in the Active Directory domain or other Kerberos realm.
Klist command shows the TGT validity.
The default lifetime for a Kerberos ticket in Active Directory is 10 hours.
However, this can be configured to a different value depending on the security requirements of the environment. The lifetime of a Kerberos ticket can be set to any value between 10 minutes and 10 years.
When a Kerberos ticket is issued, it includes a timestamp that indicates the time at which the ticket was issued. The ticket is considered valid until the expiration of its lifetime, as determined by the Kerberos policy settings.
It’s important to note that the validity period of a Kerberos ticket does not affect the validity of the user’s authentication credentials. The user’s authentication credentials (i.e. their password) are still subject to the password policy settings in the network environment, which determine how long a password remains valid and how often it must be changed.
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