ssh error logged on every login

i have a server running rhe3 and openssh-3.6.1p2. the system logs such an error for every login through the ssh server. the user can successfully login though.

Code: 
authentication failure; logname= uid=0 euid=0 tty=NODEVssh ruser= rhost=user.reversedns.com  user=root
for example, if i try to login as root from my home cable, it logs

Code: 
Sep 16 12:22:39 unicom sshd(pam_unix)[2876]: authentication failure; logname= uid=0 euid=0 tty=NODEVssh ruser= rhost=user-0ceidrr.cable.mindspring.com  user=root
Sep 16 12:22:47 unicom sshd(pam_unix)[2876]: session opened for user root by (uid=0)
any idea what's going on?

 

 

 

 

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