Hi .. if you are trying to set up a multi-site VPN scenario .. then I would suggest the ISR (Integrated service routers) depending of your needs on any site. Then you can set up DMVPN (Dynamic multi-point VPN)which allows you to dynamically establish tunnels between satellite locations. It is very easy to set up and manage. Please see the below link for more details
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...