Hi, I can authenticate using Kerberos, by running radius in debugging mode. I can see that I get Access-Accept packet but SSH doesn't gets logged in. I get following in /var/log/messages pam_radius_auth: DEBUG: getservbyname(radius, udp) returned -562132672. pam_radius_auth: RADIUS server 127.0.0.1 failled to respond pam_radius_auth: All RADIUS servers failed to respond. The file /etc/pam.d/sshd #%PAM-1.0 auth required pam_sepermit.so auth sufficient pam_radius_auth.so auth include password-auth account required pam_nologin.so account include password-auth password include password-auth # pam_selinux.so close should be the first session rule session required pam_selinux.so close session required pam_loginuid.so # pam_selinux.so open should only be followed by sessions to be executed in the user context session required pam_selinux.so open env_params session optional pam_keyinit.so force revoke session include password-auth It seems to work fine but every now and then it just breaks. Regards, Ahmed. -- Scanned by iCritical.