Kurt. I'm trying to do the same thing on a 3745. This much I know. You have to have aaa autorization turned on for this to work. if you turn on the debug(debug ip scp) , you will probably see your router deny it based on no authorization. You can use either tacacs+ or local authentication for the auth. But I know for a fact SCP will not work without it. here is a good reference..
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...