Add the following line under configuration–> permission

allow {$tab_default}

* This is for read only account, assign extra permissions if required

Configure Apache + LDAP

< Directory /var/www/racktables >
Options +Indexes FollowSymLinks MultiViews
DirectoryIndex index.php
AuthName "Rack Tables"
AuthType Basic
AuthBasicProvider ldap
AuthzLDAPAuthoritative on
AuthLDAPURL "ldaps://ldaphost.com/dc=company,dc=com?uid?sub?(objectClass=< depends_on_ldap >)"

# Bind if required
AuthLDAPBindDN "uid=userid,ou=people,dc=company,dc=com"
AuthLDAPBindPassword "xxxxxx"
AuthLDAPGroupAttribute uniqueMember
AuthLDAPGroupAttributeIsDN on
require ldap-group cn=group_name,dc=company,dc=com
require ldap-attribute cn=group-name-allowed
< /Directory >

* Most of LDAP configs based on your setup

Configure Rack Tables:

Edit the inc/secret.php

Set :

$user_auth_src = 'httpd';
$require_local_account = FALSE;

NOTE: to get the logout working properly make sure the Apache AuthName matches with the one configured for Rack tables authentication.

Referene : http://sourceforge.net/apps/mediawiki/racktables/index.php?title=RackTablesAdminGuide

Reference

./arun