On Wed, Dec 16, 2020 at 03:31:27PM +0100, Kees Bakker via FreeIPA-users wrote:
> On 16-12-2020 14:59, François Cami wrote:
> > On Wed, Dec 16, 2020 at 2:53 PM Kees Bakker <[email protected] 
> > <mailto:[email protected]>> wrote:
> >
> >     Thanks for the pointer. A bit old, but probably still relevant.
> >
> >     Anyway, I was thinking that the following may be the cause of
> >     my observation. I'm now working from home (as many will recognize).
> >     My setup is a X2GO connection to the office. The session is kept alive
> >     all the time and without a screenlock in that X2GO session.
> >
> >     Before I was working in the office, and there I had a screenlock as soon
> >     as I left my desk. I'm guessing that the TGT was renewed or newly 
> > created
> >     when I unlocked the screen. If that is the case then I never noticed an
> >     expired TGT.

Hi,

yes, whenever you type your password to unlock the screen and SSSD is
online a new TGT is requested.

> >
> >     It's just a wild guess.
> >
> >     In the mean time I'm going to figure out what the configuration should 
> > be
> >     to not run into an expired TGT all the time. Of course we have a FreeIPA
> >     flavor of it all. In my case: Centos7 for the masters, and Ubuntu for 
> > the
> >     clients.
> >
> >
> > Look at the client's configuration:
> > https://linux.die.net/man/5/sssd-krb5
> > krb5_store_password_if_offline
> > krb5_renewable_lifetime
> > krb5_renew_interval
> >
> 
> In /etc/sssd/sssd.conf I now have:
>   krb5_renewable_lifetime = 60d
>   krb5_renew_interval = 6h
> 
> The ipa client install already placed krb5_store_password_if_offline=True in 
> there.
> 
> In /etc/krb5.conf in the [libdefaults] section I have:
>   ticket_lifetime = 24h
>   default_ccache_name = KEYRING:persistent:%{uid}

using KEYRING might currently be an issue becasue of
https://bugzilla.redhat.com/show_bug.cgi?id=1722126, SSSD currently only
refreshes FILE type ccaches.

bye,
Sumit

> 
> On the clients I now see a TGT with flags FRIA. Great. It seems that my server
> only allows max 7 days.
> 
>     renew until 23-12-20 15:18:42, Flags: FRIA
> 
> Let's see if this is sufficient.
> -- 
> Kees

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