I am experiencing email failures due to reverse dns lookups. I have the reverse lookup zones setup and they look correct. I have ports 53 ip and udp open on my PIX firewall. Everything works except reverse lookups. Am I missing something on the firewall? I also have a 3640 router inline also.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...