I would like to know on pix 1 why isn't there "access-list nonat extended permit ip 10.30.30.0 255.255.255.0 10.20.20.0 255.255.255.0" since traffic from 10.30.30.x/24 subnet need to be NAT exempted when accessing 10.20.20.x/24 resources.
Using the above example again, if my pix1(hub) is a asa5510 instead and i enable it with remote access vpn, can my vpn clients be configured to allow access to networks behind pix2 and pix3 which have static and dynamic L2L vpn with my asa5510? Pls advise. Thks in advance.
The reason why there is no NAT exemption on PIX1 for traffic between PIX2 LAN and PIX3 LAN is because traffic is hairpin on the outside interface of PIX1, and there is no "NAT" statement applied to the outside interface. Since there is no existing NAT statement applied to the outside interface, there is no requirement to configure explicit NAT exemption for traffic between PIX2 and PIX3 LAN.
Yes, your VPN Client can also access PIX2 and PIX3 LAN, however, you would need to include the VPN Client ip pool subnet in the crypto ACL for LAN-to-LAN between PIX1 and PIX2, and PIX3, and vice versa. Also if you have split tunnel for your vpn client, you would need to include PIX2 and PIX3 LAN.
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...