Re: Upgrade ACS 4.1 to 4.2 Authen session timed out: Challenge n
Looks lile you are getting numerous of error messages after upgrading ACS version from 4.1 to 4.2 "Authen session timed out: Challenge not provided by client". This is actually a known defect. Well, as long as the wireless clients are authenticating fine with ACS, you can ignore this message. In order to suppress the error message, you need to apply patch 9 (22.214.171.124.9).
Bug detail: .................
CSCsv04715 - Excessive logging with "no challenge provided by client"
Symptom: Starting with ACS 4.1.4(13) excessive "no challenge provided by client" authentication failures are seen, even though clients can successfully authenticate.
Conditions: This is seen on ACS 4.1.4(13) and 4.2.0(124).
The fix is available in patch 9.
The error message "Authen session timed out: Challenge not provided by client" is made to be configurable for Failed Attempts in CSV/ODBC/Syslogfailed attempts page under Patch 9.
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...