Sessions are based off of a 5 tuple match: Source IP address, Destination IP address, Source Port, Destination Port, and timestamp. Timestamps are figured based on time the packets were received as timestamps could be off on the reporting devices.
Additionally there is some room to account for devices that do not send data immediately such as when polling Windows servers for log files instead of using a Snare agent.
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...