Hi, I am trying to use mod_auth_pam with apache with the "Fallthrough" option set. This option is supposed to let apache try other authentication modules if mod_auth_pam returns USER_UNKNOWN. In the pam configuration, I have only one module which occasionally returns PAM_USER_UNKNOWN. However when the pam_sm_authenticate() call returns, it is changed to PAM_AUTH_ERR. What is the trick ??? Patrick.