you can still use youur internal CA to issue certs, but in CA terms, unless you paid for the correct cert, your internal CA server is not a 'subordinate' CA for verisign. but as long as all your pc's going through nac have the domain root cert installed, it should avoid the SSL Cert warning you would otherwise get.
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...