Forgot to mention... both users still need access to the DMZ on the ASA. It seems so simple to just add a line on the access-lists for the encryption domains on each USER LAN to the other. But how should look the access-lists on the ASA for this to work?
Unfortunately, a direct tunnel from USER1 to USER2 it's not an option.
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...