I tried ACL to block P2P programs and it worked, for users traffic going outside it targets certain ports like 80, 443, 25, ... try to only allow these ports targeted by your inside network. If you don't know exactly what ports are targeted you can allow the port range 1 to 1024 providing that your inside network only targets standard applications.
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...