Max renewable lifetime issues

Benjamin Kaduk kaduk at MIT.EDU
Wed Mar 13 14:44:51 EDT 2013

On Wed, 13 Mar 2013, Tiago Elvas wrote:

> Hi all,
> I am having a problem in my system which I do not understand why it's
> happening.
> Firstly, I have a KDC running on a RedHat 5.7 machine. I have the parameter
> maximum_renewable_life as 5000days in kdc.conf and krb5.conf. For each user
> I have added, I also configured as 5000days max_renewable_life.
> However, I am experiencing two different situations:
>   1. In Linux clients, I only have 1000days as max_renewable_life.
>   2. In windows clients (kerberos for windows), I am getting only 30
>   days..!?

In the KfW 4.0 series, the Ticket Manager's "Get Ticket" dialog box has a 
slider for both ticket lifetime and ticket renewable lifetime; the default 
maximum renewable lifetime for this slider is 30 days.  This is purely an 
artifact of the GUI application; the kinit.exe utility does not have such 
a limitation.

The bounds of the sliders can be changed by setting registry keys 
{HKCU,HKLM}\Software\MIT\Leash\{renew,life}_{min,max} of type DWORD.  The 
value is measured in minutes.

-Ben Kaduk

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