If you want exclude a specific network from accessing the Internet, all you have to do is, exclude that specific network from dynamic-nat, below config includes only the network I want to be in dynamic nat to outside interface of the firewall.
Those network not in the object-group "inside-networks-for-dyna-nat" will not be subjected to dynamic nat.
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...
[toc:faq]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 and UDP are I...