Sudden change in ssh behavior.

[Berna Massingill]

On Tue, Nov 22, 2005 at 11:25:51AM -0600, J. K. Cliburn wrote:

>>  On 11/22/05, akonstam at trinity.edu <akonstam at trinity.edu> wrote:
>>  > Suddenly ssh-ing to any of our machines causes the following error.
>>  > /etc/ssh/ssh_config line 40: Unsupported option "GSSAPIAuthentication"
>>  > Anyone know what that means?
>>  
>>  For some reason, GSSAPIAuthentication is set to "yes" in the default
>>  ssh_config file distributed with FC4.  This causes the client to issue
>>  a DNS query looking for _kerberos.<FQDN> every time you execute the
>>  ssh command.  I found this one evening when my ISP service was dead,
>>  but I still wanted to ssh into another machine on my home network. 
>>  There was a mysterious delay in the login that was revealed when I ran
>>  a packet capture on the client.  The delay was due to the absence of a
>>  DNS server for the _kerberos.<FQDN> lookup (because my ISP was dead). 
>>  I set GSSAPIAuthentication to "no" and the delay disappeared.  Unless
>>  you're actually using GSSAPI authentication, you should be able to
>>  safely set the flag to "no" in your /etc/ssh_config file.
>>  
>>  This still doesn't explain why you suddenly started getting the error, though.
>>  

Nor does it explain why I (another user of the same machines -- as you
might guess from e-mail addresses) don't seem to be having this problem.

-- blm