Tell us what you currently have (router and firewall model). If your current hardware supports or it can support (with updates) VNPN, that would be better as it will not cost you much. Basically, most company uses firewall in their main and remote sites for internet connectivity, network/security architects take advantage of using these existing devices to build site-to-site VPN tunnels between main and remote sites so that the solution will not cost the company a lot of $$$.
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...