Regarding the process of Static NAT, to allow external users(on internet) to access a specific server, use the following command:
ip nat inside source static 192.168.0.4 184.108.40.206
this will specify a one to one Static NAT...
you can even specify ports on both (internal/external) e.g.
ip nat inside source static tcp 192.168.0.4 80 220.127.116.11 80
1) the route is only to make a default route for the router so it knows where to put traffic. e.g. the host on internet is 18.104.22.168 it did reached your router and the nat translation occured later on when your router want to return traffic it should know on which interface to forward it..
so for Nat to works you need to assign 1 the inside interface, 2 the outside interface, 3 the static/dynamic NAT statement, and 4 the route command..
Than, you need all the four steps you mentioned for NAT to work.
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...