Hi, I'm new to using Kerberos and I'm definitely not a security expert, and I 
tried searching for this but it's pretty difficult since most of the hits are 
about people trying to get Kerberos working, so here goes...

If I do "kinit notauser" to my KDC, it replies instantly with:

> kinit: Client not found in Kerberos database while getting initial credentials

If I "kinit realuser" then it replies by asking for the password as expected.

Doesn't this allow somebody to probe the KDC to find valid user names, which 
seems like a vulnerability?  Other programs like SSH don't give any information 
away on bad usernames so you can't probe for valid ones.  I thought this was a 
security best-practice, so I was suprised to find Kerberos doesn't do this.  
Or, is there a setting somewhere?  Or, am I missing something?

Thanks,
Chris
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