I have easyvpn setup for network extension mode between my site and a remote site. This is what it looks like in a nutshell.
= VPN Tunnel
As you can see the remote site's internet and vpn tunnel are from the same interface on the pix.
Basically when the Local LAN is connected directly to the PIX, internet fails but the vpn tunnel works. If the router is added, nothing works. However, if I bring down the vpn tunnel and the router is added, then internet works fine.
Here is the config I had them input at the remote PIX501:
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...