I can think of a couple options for this scenario. You could use an access-list but it would become difficult to maintain after awhile. If your goal is to block access to certain types of sites Id suggest getting a PIX firewall and use a content-control program called WebSense. Its much faster than using proxy server. Anyone else have any suggestions?
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...