I am having the same problem with a couple of my users. It appears that when Win98 nat's the packet it changes the source port as opposed to leaving it port 500. Then when the pix responds to port 500 the 98 box sends an ICMP unreachable. I am theorizing that you should be able to forward port 500 on the 98 box to the internal box, but this is often not very practical. Has anyone else had any better luck.
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...