we are running ACS 4.2(1) Build 15 on a Win2003 member server and use the ACS for EAP-TLS with certificates (Microsoft-PKI) for WLAN authentication (WLC 4402, 6.0 and 4.2). We are using both machine and user authentication.
Sometimes machine authentications fail with following message in AUTH.log:
AUTH 11/01/2010 09:11:28 E 1395 1904 0x31cb External DB [NTAuthenDLL.dll]: Could not find user host/<xxxxxxxx>.com (0x5012)
But some minutes/hours later the same machine can authenticate successful. Other machines never have this problem, no problems at all with user authentications.
Does anyone have an idea where I can proceed with troubleshooting? I haven't found any related messages in server event logs. Are there any other logs where I can find reasons for these problems that are occuring only sometimes?
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...