Re: SIte to site VPN with PIX 515E and NAT before IPSec with acc
This would work as far as the VPN connectivity is concerned, but it also means that anyone on the 172.16.22.0 network that simply wants to go to the Internet will also be NAT'd to the 188.8.131.52 address. As long as that is a valid address then you should be OK.
You really need/want to NAT this based on both the source and destination of the traffic, but you can't do this with the PIX. If there's a router on the inside of the PIX you could nat this traffic BEFORE it gets to the PIX based on an access-list, then your PIX config would simply say "send anything from 184.108.40.206 going to the FTP server acorss the tunnel".
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...