Mostly attacks happen at Layer 3 the network layer. Frame Relay and ATM Layer 2 services are perceived as providing secure foundations for enterprise WAN connectivity. The virtual circuit (VC) nature of these services keeps each customer's virtual private network (VPN) private and resistant to outside attacks.
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...