-allow_tgs_req

[Chris Hecker]

Right, I will disable the princ when I find out obviously, I just want the
person to not be able to use it as a user princ to get tickets to other
services in the meantime.  Does that make sense or am I missing something?

Chris





On Mon, Jan 8, 2018 at 20:28 Russ Allbery <eagle at eyrie.org> wrote:

> Chris Hecker <checker at d6.com> writes:
>
> > Ah, I assumed that was symmetric for some reason.  I obviously need to
> > be able to get tickets for these services.  Not sure why I thought that.
> > I'll check it out, thanks!
>
> It is symmetric, yeah, so it has the problem that you're assuming it has.
> I don't think there's a way to disable exactly the bit that you want.
> There's -allow_svr, which prevents issuing service tickets for the
> principal, and -allow_tix, which presents issuing any tickets at all, but
> I don't think there's a flag to keep from allowing that principal to
> authenticate and get a TGT.
>
> Maybe -pwexpire in the past would do what you want?  I'm not sure how that
> interacts with service tickets.
>
> Note, however, that if your keytab is compromised, the attacker can issue
> arbitrary service tickets for your service in any identity they chose, so
> I'm not sure you would want to leave service tickets enabled in that
> situation.
>
> --
> Russ Allbery (eagle at eyrie.org)              <http://www.eyrie.org/~eagle/>
>