I currently have a ASA and behind the ASA is a router. This is not our router but a venders. The router establishes a VPN tunnel to their main HQ. I am having a problem setting up the ASA. We are not natting the router so it has an internal ip address.
The vender gave me te following instructions.
1) open udp-500 and udp-4500 (I have done this)
2) if the router isnt nat'ed then we need IPSec Pass-though (IP Proto 50 [ESP]) enabled.
I am having a hard time trying to figure out who to enable it.
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...