I know this should be a very easy solution, but I have yet to solve how to route between the two interfaces. Meaning subnetA currently cannot connect to subnetB. I think that it is just a route issue, but I do not know. Please help.
PIX devices technically don't route between interfaces. To move traffic from one interface to another you must have a NAT translation set up between interfaces.
If you don't want to NAT to a different address range, you can NAT to the same addresses (like NATting from 192.168.1.0/24 to 192.168.1.0/24), but it does not act like a router and move traffic from interface to interface based on routing rules.
If you look at PIX config examples, you will see the NAT statements in the examples.
This is in addition to the issue of traffic being automatically permitted from a higher security # interface to a lower interface, but needing ACLs to permit traffic to originate at a lower security value interface to a higher security value interface.
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...