Terminiating ipSec endpoints from Cisco 811 routers
Customer has an ASA 5500 at the corp office. They will be terminating ipSec tunnels from approximately 25 remote locations onto this device.
The remote end will be hooked up via a cable modem, with a Cisco 811 router behind it. The outside interface on the 811 will be a private address provided dynamically by the cable provider.
The desired outcome here is to be able to configure: Remote workstation <-> Cisco 811 <=====ISP=====> 5500 <-> corporate core.
Outside interface on the ASA is public.
I've actually set this up and had it working with equipment from other manufacturers (where one end point is a private address that's being NAT'd). But the last time I tried this ( a few years ago), this configuration was not possible with Cisco.
Has this changed so that it is now supported/possible? Any links to any good docs on configuring this?
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...