I am trying to get an idea of a recommended value for the embryonic sessions limit (tcp intercept) number for the nat and static statements on the FWSM. Any number between 0-65535 can be set, with the limit defaulting to 0 (unlimited embryonic sessions). In my mind, any number over 100 is excessive. Two hosts should be able to establish the three-way-handshake in a stable environment with well under 100 different attempts to send a packet with the SYN flag set in the TCP header. Has anyone else had experience with a 'good, safe' number to set the embryonic sessions limit? What impact is there, if any, to the FWSM memory consumption while acting as a connection proxy between two hosts?
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...