?
Solved

Server losing trust relationship - Member server 2008 R2

Posted on 2014-03-12
3
Medium Priority
?
9,758 Views
1 Endorsement
Last Modified: 2015-07-26
In the past 72 hours two of our servers have lost their trust relationship to the domain.
We are running 2008 R2 in native 2008 R2 mode with our domain.

Both servers were restarted and they regained their trust relationship.
We have poured over event logs, DNS entries, and networking configurations to try and determine why the trust relationship were dropped.

They are both member servers running 2008 R2.
I am concerned it will happen again.

Why are trust relationships dropped in the first place?
Thanks
1
Comment
Question by:peter_ophoven
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 25

Assisted Solution

by:Zephyr ICT
Zephyr ICT earned 400 total points
ID: 39925669
Trust relationships are dropped when the computer can not authenticate with AD, computers or servers are just like users, they need to authenticate.

Did you check the eventlogs on your Domain Controllers for any security issues regarding maybe Kerberos and these servers?

There's also an interesting article here, to maybe help you pinpoint the issue.
0
 
LVL 37

Accepted Solution

by:
Mahesh earned 1600 total points
ID: 39925712
On affected server disable unwanted network cards

On affected server go to run and enter %logonserver%
This should resolves to NetBIOS name of local authenticating DC
If it resolves to another site domain controller, then 1st check AD site to subnet assignment and ensure that server subnet is latched to appropriate site and please reboot the server once and check

If you get error for above command, then you need to check network card properties as below
On affected computer \ server please open Advanced Tcp/IP settings and check DNS Tab.
In DNS tab, check below settings.
ensure that "Append Primary and connection specific dns suffixes" radio button is selected
Ensure that "Append parent suffixes of primary dns suffix" checkbox is selected
Ensure that "register this connection addresses in Dns" checkbox is selected
If there is any deviation in the above settings, its probably you will face name resolution \secure channel issues

The following command tests the secure channel for a computer:
nltest /server:<ComputerName> /sc_query:<DomainName>

The following command resets the secure channel for a computer:
nltest /server:<ComputerName> /sc_reset:<DomainName>

To reset the SC between a computer and a DC with PowerShell

Open PowerShell on the computer and run

Test-ComputerSecureChannel -repair

*The cmdlet requires PowerShell 2.0, which is pre-installed on Win7/2008R2.

All above commands will reset secure channel between workstation and DC and please reboot affected server once after running commands

Mahesh
0
 

Expert Comment

by:scoker
ID: 40899487
Thanks I was reading the same article when your post came in.
0

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Sometimes drives fill up and we don't know why.  If you don't understand the best way to use the tools available, you may end up being stumped as to why your drive says it's not full when you have no space left!  Here's how you can find out...
OfficeMate Freezes on login or does not load after login credentials are input.
This tutorial will walk an individual through configuring a drive on a Windows Server 2008 to perform shadow copies in order to quickly recover deleted files and folders. Click on Start and then select Computer to view the available drives on the se…
This tutorial will walk an individual through the process of transferring the five major, necessary Active Directory Roles, commonly referred to as the FSMO roles to another domain controller. Log onto the new domain controller with a user account t…
Suggested Courses

800 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question