Can we increase the Kerberos ticket time?
Yes, changing the Kerberos policy settings can increase or decrease the lifetime of Kerberos tickets in a Kerberos realm.
The duration of Kerberos tickets, for example, can be changed in an Active Directory domain using Group Policy. This is how you do it:
- Open the Group Policy Management Console (gpmc.msc).
- Edit the Default Domain Policy or create a new group policy object (GPO) linked to the domain.
- Navigate to Computer Configuration > Policies > Windows Settings > Security Settings > Account Policies > Kerberos Policy.
- Modify the “Maximum lifetime for user ticket” and “Maximum lifetime for service ticket” settings as desired. These settings are measured in hours, with a default value of 10 hours.
- Save the changes to the group policy object and wait for them to be applied to the domain.
Always keep in mind that increasing the lifetime of Kerberos tickets may increase security breaches more likely because there will be more time for hackers to use their stolen tickets. When changing Kerberos policy settings, it’s important to find a balance between convenience and security.
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