At ETH ticket granting tickets
expire after one hour but can be renewed while still valid for up to seven days.
Modern Linux systems use
for authentication and authorization. For logins and sessions established by
it can also renew Kerberos tickets it created. isginf
managed Linux systems are always configured this way.
To enable this feature on your own Linux make sure that
on your system has
krb5_renew_interval = 1800
sections. If you need to change the file, please restart
Tickets can be renewed any time by running
You may need to install the
If SSH is configured correctly
on the system you log in from and to then the ticket on the source system is pushed to the target system when it changes. As long as the ticket of the source system is kept valid it will also remain valid on the target system.