Our network has a firewall protecting a WAN link. The firewall runs in Transparent mode. A new firewall was added to act as a DMZ to the existing firewall. This firewall is running in routed mode. All connectivity is good but we have a problem with a server that will not backup. The connection it established through the first firewall and into the DMZ and all seems ok. After 2 hours the back up fails. There are no error messages and I have allowed any ip traffic in both directions.
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...