the existing ASA has one Outside interface and has a site-to-site tunnel configured already for Company_A.
I need add another site-to-site tunnel on the ASA to peer with Company_B. Can I use the same outside interface (ip address) to achieve this or I need to add an additional physical interface on the ASA to achieve this?
You can have multiple site-to-site IPSEC tunnels using the same outside source address as the remote peer address for every tunnel would be different. There is no need for additional physical interfaces or addresses.
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...