i try to do sshd authentication to external radius through a pam. on my linux i have freeradius client my packages: pam 1.0, pam_radius-1.3.17, openssh-4.3p2, freeradius-client-snapshot-20080830 my /etc/pam.d/sshd look like this: #%PAM-1.0 auth sufficient /lib/security/pam_radius_auth.so auth include system-auth #auth sufficient /lib/security/pam_radius_auth.so account required pam_nologin.so account include system-auth password include system-auth session optional pam_keyinit.so force revoke session include system-auth session required pam_loginuid.so My shared secret is configured in /etc/raddb/server file. The radiusclient.conf configured too sshd_config file: # $OpenBSD: sshd_config,v 1.73 2005/12/06 22:38:28 reyk Exp $ # This is the sshd server system-wide configuration file. See # sshd_config(5) for more information. # To disable tunneled clear text passwords, change to no here! PasswordAuthentication no ChallengeResponseAuthentication yes UsePAM yes Subsystem sftp /home/max/openssh-4.3p2/pc86//libexec/sftp-server when i try to connect to sshd i have log message of wrong password, i check it too on side of radius server.