Hi, can somebody explain what does this error message means: Thu Jan 23 17:33:39 2003: [24416] pam_pass: pam_authenticate: User not known to the underlying authentication module Thu Jan 23 17:33:39 2003: [24416] unix_pass: pam_pass for "RADTEST" failed background: I'was trying to setup a radius server on linux. the system is redhat 7.2 , radiusd-2.1.va from livingston that I compiled from the source rpm with default options. # /usr/sbin/radiusd -v /usr/sbin/radiusd: Livingston RADIUS 2.1.va.1 2001/7/5 NDBM NOSHADOW flat_users the server then started with the following options: #/usr/sbin/radiusd -x -b -f /etc/raddb/radius.sdw the intention is to specify -f , to use alternative shadow password files. while this setup works fine on redhat 6.2 , for redhat 7.2i or redhat 8 I got the following error from log Thu Jan 23 17:33:39 2003: [24416] pam_pass: pam_authenticate: User not known to thed underlying authentication module Thu Jan 23 17:33:39 2003: [24416] unix_pass: pam_pass for "RADTEST" failed some observations: 1. checked /etc/pam.d/radiusd , they are the same as redhata 6.2 2. if I have the user in the regular /etc/shadow file, the authtication for "RADTEST" works fine _______________________________________________ Pam-list@redhat.com https://listman.redhat.com/mailman/listinfo/pam-list