LDAP PAM Authentication This method utilizes the pam_ldap or pam_ldapd PAM modules from the libpam-ldap package to check credentials against a LDAP server. PAM Setup with libpam-ldapd libpam-ldapd is a newer alternative to the original libpam-ldap. libpam-ldapd uses the same backend (nslcd) as libnss-ldapd, and thus also shares the same configuration file (/etc/nslcd.conf) for LDAP connection para