Ok, you are using enhanced Easy VPN (DVTI). Here is some comment.
1. based on the following, you have FTP/HTTPS server terminated on leased line interface. Currently default route is point to ADSL interface. You might need to use policy route to forward the traffic from 192.168.0.5 port 21/443 back to the leased line 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...