If you have absolulely no idea what you are doing, I think you best either hire an expert, or start with buying CCNP Security books (FIREWALL would contains the most usefull information).
If you do are familiar with the ASA and its configuration, it again depends on the version of software you are running. The configuration of NAT changed dramatically in version 8.3. If you can give the version of the ASA software (not the ASDM), we can further assist in setting up port forwarding (NAT translation).
Basically the format for that portforward would be this.
I'm just using random values for interface names and IP addresses
LAN interface: inside
WAN interface: outside
LAN device IP: 10.10.10.10
object network SSH-PORTFORWARD
description TCP5000 to TCP22
nat (inside,outside) static interface service tcp 22 5000
Basically the above should forward TCP/5000 traffic arriving to the IP address of the "outside" interface on the ASA to the port TCP/22 to host on the LAN with the IP address of 10.10.10.10 (Hopefully I didnt mess up the order of the port numbers in the above configuration)
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...