We're running a very strange issue for a couple of days now. Our ACS v188.8.131.52 started to drop connection from wired and wireless connections, with a "Radius Request Dropped" message. The detailed message is : "RADIUS Request dropped : 11051 RADIUS packet contains invalid state attribute".
This message is usually preceded with a "RADIUS Request dropped : 24444 Active Directory operation has failed because of an unspecified error in the ACS" error.
The communication with Active Directory seems to be ok since worstations are getting a valid ip adress when connected to a non 802.1x switch port (Cisco 4506).
Following your advice, we've observed the connectivity status on ou primary and secondary instances. It shows connected most of the time. For time to time the status shows disconnected. On the event log of our Active Directory controllers, we have a lot of events Id 27, source kdc referring to the adminacs account used to join the domain. We also have the same events referring to the computer accounts primaryacs and secondaryacs. The exact message is : "While processing a TGS request for the target server
the account adminacs did not have a suitable key for generating a Kerberos ticket (the missing key has an ID of 8). The requested etypes were
. The accounts available etypes were 23 -133 -128 3 1."
We've tried to clear the AD configuration the recreate the acs computer accounts. It seems to be ok for now.
I guess the link to AD got somewhat corrupted. It seems to be connected with Kerberos encryption.
I'll give an update on this since we are working with MS Support on this.
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...