Reverse Lookup does not works. Updated 2014-07-28T09:38:21+00:00 Issue Configured DNS server internally and necessary nat setting has been done on firewall. Still unable to resolve records configured in zone. Environment Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Bind (as DNS server) Subscriber content preview. For full access to the Red Hat Knowledgebase, please log in.Not a subscriber? Learn more about the benefits of Red Hat Subscriptions.