Extreme Control "Asserting: Full Loss of Contact to LDAP Service detected: <LDAP_profile> due to: No response to NTLM request"
Extreme Management Center may be alarming indicating the following event:
Asserting: Full Loss of Contact to LDAP Service detected: <LDAP_Profile> due to:
The authentication request was rejected due to NTLM authentication error:
No response to NTLM request
The event may occur hourly.
Extreme Management Center (XMC, formerly NetSight)
Extreme Control (NAC)
All Software Releases
An unknown condition is present in the winbind service used by Extreme Control that contributes to a delay in performing Kerberos re-ticketing hourly.
The cause of this issue is unknown. A reboot of the Control appliance appears to resolve the issue.
The unknown condition is related to the winbind hourly cache renewal and Kerberos re-ticketing and is not directly related to any Extreme Control software. It is suspected to be an Ubuntu-based issue with the winbind application.
A tcpdump between Control and Active Directory at the time of the event will show the following symptoms:
A delay during Kerberos ticketing.
The delay may be 5 or more seconds or longer for each Kerberos ticketing request.
There are generally three ticketing requests.
Two delays greater than 5 seconds will contribute to the timeout failure.