What interface do you monitor? If it is Ethernet only, Ethereal is a good choice. If it is ATM, Serial etc, I would recommend to consider Niksun NetVCR (www.niksun.com). It is a commercail appliance building on FreeBSD kernel. It captures raw packets and stores into database for post-event analysis w/ stream reassembly regardless of the L2 protocol.
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...