Re: Principal naming

2013-01-18 Thread Russ Allbery
Nico Williams writes: > There's really no point to the /admin thing: since the server requires > INITIAL tickets there's no risk of use of stolen TGTs for accessing > kadmin, and if you were to have different pre-authentication > requirements for kadmin than for initial TGTs the protocol does all

Re: Principal naming

2013-01-18 Thread Jeff Blaine
On 1/18/2013 2:13 PM, Bob Liu wrote: > You should look at it this way... |primary/instance@REALM > > |In the case of a user, it's the same as your username. For a host, the > primary is the word |host|. > The instance is an optional string that qualifies the primary. In the > case of a user, the i

Re: Principal naming

2013-01-18 Thread Marcus Watts
Jeff Blaine writes: > Can anyone explain away the reasoning behind the decision > to make user principals need the form: > > specific_part/contextual_part > > e.g. jennifer/admin > > and service principals the OPPOSITE - of the form > > contextual_part/specific_part > >

RE: Principal naming

2013-01-18 Thread Bob Liu
You should look at it this way... primary/instance@REALM In the case of a user, it's the same as your username. For a host, the primary is the word host. The instance is an optional string that qualifies the primary. In the case of a user, the instance is usually null, but a user might a

Re: kadmind crash because of many kadmin_0 file descriptors

2013-01-18 Thread Greg Hudson
On 01/18/2013 12:37 PM, Jonathan Reams wrote: > Earlier this week we had a problem where kadmind exceeded its file > descriptor ulimit with roughly a thousand open file descriptors for > /var/tmp/kadmin_0. That's a replay cache. By my understanding of the code, kadmind should create 16-24 handles

Re: Principal naming

2013-01-18 Thread Nico Williams
On Fri, Jan 18, 2013 at 11:25 AM, Jeff Blaine wrote: > Can anyone explain away the reasoning behind the decision > to make user principals need the form: > > specific_part/contextual_part > > e.g. jennifer/admin > > and service principals the OPPOSITE - of the form > > contextual_pa

kadmind crash because of many kadmin_0 file descriptors

2013-01-18 Thread Jonathan Reams
Earlier this week we had a problem where kadmind exceeded its file descriptor ulimit with roughly a thousand open file descriptors for /var/tmp/kadmin_0. Parts of our identity management system maintain a number of connections to kadmin, and we think there may be something that is initializing a ka

Principal naming

2013-01-18 Thread Jeff Blaine
Can anyone explain away the reasoning behind the decision to make user principals need the form: specific_part/contextual_part e.g. jennifer/admin and service principals the OPPOSITE - of the form contextual_part/specific_part e.g. host/daffodil.mit.edu What happened? Who