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Event ID 675

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Event ID 675

Postby chicagotech » Wed May 02, 2007 8:18 am

In most cases, Failure Code: 0x18 may cause by account disabled, expired, or locked out. Check if you have services or application started using expired user account.

Bob Lin, MS-MVP, MCSE & CNE
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"Ripley" <Ripley> wrote in message news:9E06AB0B-BD2C-4C82-AAD7-2E1A2F21FC7A@microsoft.com...
I am getting hundreds and hundreds of event logs (ID 675) every day on my SBS
2003 Server. These errors are:

-------------------------------------------------------------------
Event ID: 675
Pre-authentication failed:
User Name: Administrator
User ID: PLASMAN\Administrator
Service Name: krbtgt/PLASMAN
Pre-Authentication Type: 0x2
Failure Code: 0x18
Client Address: 127.0.0.1


For more information, see Help and Support Center at
http://go.microsoft.com/fwlink/events.asp.
----------------------------------------------------------------

If I understand this error correctly then it looks like the SBS2003 Server
is failing when trying to authenticate with itself - since 127.0.0.1 is the
localhost address.

Any ideas would be greatly appreciated on this one.

Thanks.
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Postby chicagotech » Tue Jul 24, 2007 8:35 am

I have a similar issue but with Failure Code: 0x19.

In mostcases, the Failure Code 1x19 indicates that the credentials for the specified server have been revoked. This means that originally valid credentials _were_ issued, but were
subsequently revoked or expired and not renewed. Please see RFC 1510 for a list of Kerberos error codes.
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:25 pm

I recently turned on full auditing of systems in my domain. I
have been sporadically noticing the above event ID's on my DC's. I
was wondering if anyone could shed some light on the subject... I have
researched this and most of the event's I have seen have been type 0x2
with code 0x18 - meaning wrong username or password. But this is not
the case for these.

Usually - there is an audit of first the computer, and then the user
that fails... sometimes it's just the user, and the computer has
successfully audited.
---------------------------------------------------------------------------------------------------------------

Here is an example of the failed computer audit (I have noticed that
MOST of these are Vista systems)

Source: Security
Category: Account Login
Event ID: 675

Pre-authentication failed:
User Name: COMPUTERNAME$
User ID: DOMAIN\COMPUTERNAME$
Service Name: krbtgt/DOMAIN.LOCAL
Pre-Authentication Type: 0x0
Failure Code: 0x19
Client Address: 192.168.1.15
---------------------------------------------------------------------------------------------------------------

Here is an example of the failed computer audit (I have noticed that
MOST of these are Vista systems)

Source: Security
Category: Account Login
Event ID: 675

Pre-authentication failed:
User Name: user
User ID: DOMAIN\user
Service Name: krbtgt/DOMAIN.LOCAL
Pre-Authentication Type: 0x0
Failure Code: 0x19
Client Address: 192.168.1.15
*****************************************************************************************

Right after this, there are events of successful audits. Here is an
example of the event's right after the failed events for the computer
accounts:

Source: Security
Category: Account Login
Event ID: 672

Authentication Ticket Request:
User Name: COMPUTER$
Supplied Realm Name: DOMAIN.LOCAL
User ID: DOMAIN\COMPUTER$
Service Name: krbtgt
Service ID: DOMAIN\krbtgt
Ticket Options: 0x40810010
Result Code: -
Ticket Encryption Type: 0x17
Pre-Authentication Type: 2
Client Address: 192.168.1.15
Certificate Issuer Name:
Certificate Serial Number:
Certificate Thumbprint:

Source: Security
Category: Account Login
Event ID: 673

Service Ticket Request:
User Name: COMPUTER$@DOMAIN.LOCAL
User Domain: DOMAIN.LOCAL
Service Name: COMPUTER$
Service ID: DOMAIN\COMPUTER$
Ticket Options: 0x40810000
Ticket Encryption Type: 0x17
Client Address: 192.168.1.15
Failure Code: -
Logon GUID: {1deab70f-c87d-7174-424c-04c96f656986}
Transited Services: -
*****************************************************************************************

Here is an example of the event's right after the failed events for
the user accounts:

Source: Security
Category: Account Login
Event ID: 672

Authentication Ticket Request:
User Name: user
Supplied Realm Name: DOMAIN.LOCAL
User ID: DOMAIN\user
Service Name: krbtgt
Service ID: DOMAIN\krbtgt
Ticket Options: 0x40810010
Result Code: -
Ticket Encryption Type: 0x17
Pre-Authentication Type: 2
Client Address: 192.168.1.15
Certificate Issuer Name:
Certificate Serial Number:
Certificate Thumbprint:

Source: Security
Category: Account Login
Event ID: 673

Service Ticket Request:
User Name: user@DOMAIN.LOCAL
User Domain: DOMAIN.LOCAL
Service Name: DOMAIN_CONTROLLER$
Service ID: DOMAIN\DOMAIN_CONTROLLER$
Ticket Options: 0x40800000
Ticket Encryption Type: 0x17
Client Address: 192.168.1.15
Failure Code: -
Logon GUID: {76c85a7f-845d-407a-8d65-f53f3dec2c4e}
Transited Services: -

Any help would be greatly appreciated, I am just trying to better
understand what is going on here and why I am getting the Pre-
Authentication Failures at very random times...
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:25 pm

These pre-authentication failed is sometimes caused by the wrong time at the client. We deliver .NET applications to track these stuff
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:27 pm

Pre-authentication failed: User Name: ohqnas$ User ID: %{S-1-5-21-1957994488-115176313-1801674531-10659} Service Name: krbtgt/PERMA-FIX.COM Pre-Authentication Type: 0x0 Failure Code: 0x19 Client Address: 192.168.3.8

I am constantly getting these events on my 2003 Domain Controller. The device its' alerting on is my NAS.
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:27 pm

NAS is a Netwrok Attached Storage device, undestood generally as a file server, access probably over SMB/CIFS file sharing, must be built on some operating system. If it is built on Windows, than try to use what I have given you. If it is based on some weird-unix-unsupported-unsupportable-extraterestrial-which-nobody-understands, than the solution depends on the vendor :-)
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:29 pm

I have SBS 2003. When I joined a Vista X64 client to the domain these event 675 errors start appearing. How do you troubelshoot it?
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:30 pm

Have you applied Windows Server 2003 SP2 to your SBS yet? If not, that may take care of the error messages.
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:31 pm

I haven't yet isolated the problem, but I notice that if I drop the firewall on the Vista system the problem goes away -- no more 675's (I was consistently getting the 0x19 condition).

Must me that Vista is blocking a port that Kerberos needs to have open. Hope this helps. Let you know when I isolate the port.
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:32 pm

http://support.microsoft.com/default.as ... s%3B305144

Gene:

The secret is to get the VISTA computer account to not require pre-authenticate. VISTA appears to need a prompt from the server before it will attempt a pre-authentication -- hence the event 675, 0x19. The link above shows you how set DONT_REQ_PREAUTH for the VISTA workstation using the ADSI Edit utility in your Resources Kit.

Took me forever to find this fix, but it works.
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:33 pm

I have had the very same problem with one of the SBS2003 based networks we manage. We have many networks with several Vista workstations attached to them, but one of the networks exhibit the same problem as you describe. We have 32bits Vista and each time a new Vista worksations comes in we get these 675 event ids. Tweaking the USerAccountControl flag with ADSIEdit helps hiding the errors but doesn't reveal the root cause.

What differentiates the network exhibiting the problem from the other networks I manage is that this is the only SBS2003 that has been migrated from SBS2000 using the Swing migration method (I contacted Jeff Middleton about this and we don't see anything obvious in the migration method that would cause this). Has your SBS2003 been installed from scratch ?

I attach to this thread the systeminfo file requested earlier in the thread.
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Re: Event ID 675

Postby chicagotech » Mon Dec 27, 2010 1:36 pm

Ok.. first just wanted to point out is a MS issue. You will read that this is safely ignored. So why is it logged?

Anyways, to get around this issue.

Open ADSIEDIT.MSC

goto your domain and OU that has your machine
right click the machine and scroll down to
userAccessControl

computer account should be normall 4096
add 4194304 to this to give you 4198400

This will enable the DONT_REQ_PREAUTH flag.

Do this to your VISTA boxes and things will clear up.

Article describing this action:

http://support.microsoft.com/default.as ... s%3B305144
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Re: Event ID 675

Postby guest » Mon Dec 27, 2010 4:01 pm

We are seeing errors similar to the following on our domain controllers for
all of our Windows 2008 (x86 and x64) servers:

Pre-authentication failed:
User Name: SERVERNAME$
User ID: DOMAIN\SERVERNAME$
Service Name: krbtgt/DOMAIN.COM
Pre-Authentication Type: 0x0
Failure Code: 0x19
Client Address: SERVER IP

Our active directory domain consists of two windows 2003 R2 x64 domain
controllers (if that matters).

I've done some searching online and found several other people seeing
similar errors with Windows Vista but no really good explanation of what's
causing them. The best I can find is a work around which suggests

1. On the domain controller, run "adsiedit.msc"
2. Locate the computer accounts DOMAIN\EXC$ under the Domain partition.
3. Right-click on "DOMAIN\EXC$", click Properties.
4. Then locate the attribute "UserAccountControl" in the Attributes list.
Click Edit.
5. Modify the value to original value plus 4194304. For example, if the
original value is 512, the new value should be 512+4194304A94816
6. Click OK, click Apply, and click OK.
7. Quit ADSI Edit. Then you can check if the event 675 stops for these
accounts.

I've done this and it does seem to resolve the issue but I don't want to be
having to do this for each and every new Windows 2008 server we introduce
into active directory. Surely there must be some logical explanation for
what's causing these entries and how we can stop them without the elaborate
work around above?

If anyone has any suggestions or ideas, please let me know.

Thanks
Brad
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Re: Event ID 675

Postby guest » Mon Dec 27, 2010 4:02 pm

Below is the output of the event log. Obviously I scrubbed some of the data
below (such as the PC names, domain controller names, domain name, ip
addresses and other sensitive information). But the event ID, and failure
codes are still as-is etc.

Thanks
Brad


Event Type: Failure Audit
Event Source: Security
Event Category: Account Logon
Event ID: 675
Date: 2/18/2009
Time: 12:06:19 AM
User: NT AUTHORITY\SYSTEM
Computer: DOMAINCONTROLLER
Description:
Pre-authentication failed:
User Name: WIN2K8SERVER$
User ID: DOMAIN\WIN2K8SERVER$
Service Name: krbtgt/DOMAIN.NET
Pre-Authentication Type: 0x0
Failure Code: 0x19
Client Address: 123.123.123.123
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Re: Event ID 675

Postby guest » Mon Dec 27, 2010 4:02 pm

Make sure the machine is correct registered in your DNS zones. Please post
an unedited ipconfig /all from the existing DC's and the 2008 machine with
the error.

Assuming that you use private ip ranges there is noproblem to post them here.
10.x.x.x 172.x.x.x or 192.168.x.x are not accessible form outside.

Also run netdiag /v and post the output also.
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