I have been using NetFlow to monitor incoming and outgoing traffic on my Cisco 1841 router. The 1841 router is just an edge router but my ASA 5510 is my firewall and where my remote site's VPN connection start and end. I've been seeing some high traffic on my router and since most of it's encrypted I can't tell who is causing all the traffic issues (actual source IP). I know the ASA doesn't support netflow so I wanted to see what other options I have to look more deeply at the traffic going through that device, unencrypted.
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...