Could you please provide the purpose of this kind of setup?
What software level are you running on the firewall? 8.2 and earlier OR 8.3 and after?
You can NAT a single local IP address to many public IP addresses with Policy NAT. But in a Policy NAT setup you have to define the remote/destination networks for which the local IP address is visible with the mentioned public IP addresses.
If you can clarify your setup that would require such a NAT configuration I could give you an example.
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...