Hello,Alan.

Thank you for you response.
Alan wrote:
> This is an issue with PAM on the client machine. Some other module is
doing password checking. When the password check fails, it re-sets the
password to "INCORRECT". That password is then sent to the pam_radius
module.
Go fix the client so that the PAM modules don't change the password.

My /etc/pam.d/sshd file contains the following settings:
-bash-3.2# cat sshd
#%PAM-1.0
auth     sufficient pam_radius_auth.so debug
auth     include    system-auth
account sufficient pam_radius_auth.so
account required   pam_nologin.so
account include    system-auth
password sufficient pam_radius_auth.so
password include    system-auth
session sufficient pam_radius_auth.so
session optional   pam_keyinit.so force revoke
session include    system-auth
session required   pam_loginuid.so