Whenever I use secure shell on my Linux servers these error messages =
appear in /var/log/messages:

Aug 18 09:43:40 test-desk sshd(pam_unix)[28553]: authentication failure; =
logname=3D uid=3D0 euid=3D0 tty=3DNODEVssh ruser=3D =
rhost=3Dtest-mobl2.amr.corp.com  user=3Dtest
Aug 18 09:43:49 test-desk sshd(pam_unix)[28555]: session opened for user =
test by (uid=3D500)

Aug 28 09:44:20 test-desk sshd(pam_unix)[28590]: authentication failure; =
logname=3D uid=3D0 euid=3D0 tty=3DNODEVssh ruser=3D =
rhost=3Duelinux.corp.com  user=3Dtest
Aug 28 09:44:33 test-desk sshd(pam_unix)[28592]: session opened for user =
test by (uid=3D500)

The SSH session works but I get this authentication failure message =
appearing.  I am guessing that this is not a problem, but does anyone =
know what it means and what causes it?

Thanks,

Brian