[Fedora-directory-users] warnings in /var/log/secure

[Aaron Bliss]

Hi everyone,
I have several redhat 4 and 5 machines authenticating successfully 
against our ldap servers.  I used authconfig to configure the clients 
and everything works great, ssh, vsftp, etc.  However, for some reason, 
I always see a log entry similar to the following in /var/log/secure, 
even though the login works;
Apr 10 08:34:27 server1 sshd[30937]: pam_unix(sshd:auth): authentication 
failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=137.21.80.195  
user=user1

Here is the contents of /etc/nsswitch.conf
cat /etc/nsswitch.conf | grep -v \#

passwd:     files ldap
shadow:     files ldap
group:      files ldap
hosts:      files dns
bootparams: nisplus [NOTFOUND=return] files
ethers:     files
netmasks:   files
networks:   files
protocols:  files ldap
rpc:        files
services:   files ldap
netgroup:   files ldap
publickey:  nisplus
automount:  files ldap
aliases:    files nisplus

Any ideas?  Thanks for your help.
Aaron