Make sure that in Config - System - Servers - Authentication, when you add the PDC/BDC in as the auth server, enter the PDC/BDC's server name where it asks for "Domain Controller Name", don't enter the domain name here.
Does it work when you use the Test button on the Auth server screen, and not work when a user tries to come in? Make sure in the user group under the IPSec tab you have NT Domain listed as the Authentication Type.
Then go to Config - System - Events - Classes and add the AUTH and AUTHDBG classes at Severity to Log of 1-13. Go to Monitoring - filterable Event Log, hit Clear Log, try a test authentication then hit Get Log, then check to see what's going on. Post the output back here if you're not sure what's happening.
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...