I'm aware that the PIX won't pass traffic back out of the interface it arrived on. But does the same rule apply if the inbound traffic is via a VPN, if a VPN connection is established to the inside interface will traffic then be allowed to exit that same interface?
The scenario I have is I want some PC's on the inside network to VPN into the PIX and have access to the internal hosts!
A PIX will not allow the same interface to be used for incoming and outgoing packets. However, I have been told of an exception where this can be done provided you have a PIX that can use VLANs to divide the ethernet. For more information, please see
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...