As you may know, lock-and-key creates dynamic ACE once the user is authenticated by the router on telneting into it. If there's no ACL applied on F0/0 then there's no need for this feature enabled at all as all traffic is allowed through this interface. You don't need to apply the ACL on all the interfaces but apply on the interfaces that you want to allow the user traffic to traverse only on successful authentication.
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...