On Tue, Nov 22, 2005 at 11:25:51AM -0600, J. K. Cliburn wrote: >> On 11/22/05, akonstam@xxxxxxxxxxx <akonstam@xxxxxxxxxxx> 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
