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Event ID 40961 -
The
Security System could not establish a secured connection with the
server ldap/Computername.domain.com. No authentication
protocol was available.
Causes, symptoms and
resolutions:
DNS issues.
1. If there is there
an Event ID 40960, it is more likely a forward lookup zone issue in
DNS. Otherwise, the DNS server has a reverse lookup zone.
2. The client uses
Linksys router as DHCP and assign the router IP address as DNS.
Creating and using Windows server as DNS server fixes the problem.
3. The DNS server uses
the ISP DNS as primary DNS and the internal DNS as alternative DNS.
Setup the Windows DNS as primary DNS.
4. If this is
multihomed computer, disabled DNS registration on the WAN NIC.
5. If you must use
ISP’s DNS, you may need to enable
NETBIOS over TCP/IP.
The event only
occurs when a specific user logon or a specific machine
1.
Backup the user profile and create a new profile for the user.
2.
Remove the computer account from the domain and re-join it.
3.
If you receive this error after changed the password, make sure
you logoff all connections. For example, you may still connect to TS
using the old credentials.
Services related
issues
1. Make sure the
NETLOGON service is running.
2. Start the Site
Server Content Deployment (CRS) service.
3. Incorrect
passwords or user names assigned to the service can be the issue.
4. Make sure the DHCP
client service is started on all machines including the computers with
static IP addresses, for example Domain Controllers.
You receive this
Event every hour or DHCP issues
- Make sure credentials
assigned to the DHCP server to register DNS dynamic updates are
valid.
- Incorrect passwords or
user names assigned to the DHCP may cause the problem.
- Make sure the DHCP client
service is started on all machines including the computers with
static IP addresses, for example Domain Controllers.
NIC related issues
- Upgrading the NIC driver.
-
Uninstalling/reinstalling the "client for Microsoft Networks" from
the NIC.
-
Reset TCP/IP using
netsh command.
Service Patches
Installing the latest
SP. |
