Kerberos 5 and DNS aliases

[Simon Wilkinson]

On 2 Dec 2007, at 06:32, Victor Sudakov wrote:

>
> I have created a principal for each of the several names, and placed
> these principals' keys into the destination server's keytab. However
> when I try to ssh into this server, GSSAPI auth works only for one of
> these names, actually the name which is equal to the server's  
> `hostname`.
> I can even choose which name will work, by changing the server's
> `hostname`. But only one name at a time will work.

The GSSAPI library is canonicalising the name passed to it, by doing  
a forwards, then a reverse lookup in the DNS to obtain the fully  
qualified hostname of the machine which you are connecting to. Recent  
MIT releases provide a means of disabling this canonicalisation, but  
I'm not sure about Heimdal.

Simon.