I am planning to use ASA 5520 as the hub for a hub / spoke VPN. With the spoke to spoke vpn confguration where all remote site vpns terminate on the same (outside) interface, will the AIP SSM IPS module be able to inspect traffic from one spoke that bounces off the ASA to a second spoke, or can it only inspect traffic that actually "passes through" the firewall?
ASA diverts packets to AIP SSM just before the packet exits the egress interface (or before VPN encryption occurs, if configured) and after other firewall policies are applied.For more info refer the following URL
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...