Hi,
I've recently (1st October) migrated our ADSL service to BT infinity, utilising the new Business Hub 3 in place of the old Netgear router.
Since the migration we've had problems on our network (4 desktop running XP Pro SP3 & 1 server running SBS 2003) in the form of the XP clients losing their connection (authentication) to the network shares. On the desktop this presents as an error message when trying to connect to a network drive. In the event viewer the following event IDs are present:
Event Type: Warning
Event Source: LSASRV
Event Category: SPNEGO (Negotiator)
Event ID: 40960
Date: 06/11/2012
Time: 11:50:33
User: N/A
Computer: WINNING3
Description:
The Security System detected an attempted downgrade attack for server ldap/WKCDC. The failure code from authentication protocol Kerberos was "There are currently no logon servers available to service the logon request.
(0xc000005e)".
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
and...
Event Type: Warning
Event Source: LSASRV
Event Category: SPNEGO (Negotiator)
Event ID: 40961
Date: 06/11/2012
Time: 11:50:33
User: N/A
Computer: WINNING3
Description:
The Security System could not establish a secured connection with the server ldap/WKCDC. No authentication protocol was available.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
I have a feeling this is to do with DNS however i don't have much to back that up. The SBS 2003 server runs DHCP, nothing complicated and the BT Hub is the default gateway and has been providing DNS (as per previous configuration with Demon ADSL & Netgear Router).
Until now, i've not been able to do much in the way of resolution as I've had a separate issue with sourcing a BT Hub from BT after the first one failed and the engineer left me with a Home Hub! Now the correct and working Hub is installed I can try and resolve the problem.
Any help is greatly appreciated!
Many thanks.
A.
