Update resolves a problem in which LDAP, Kerberos and DC locator responses are slow or time out with Windows

Applies To
Windows 7 Service Pack 1 Windows 7 Enterprise Windows 7 Professional Windows 7 Ultimate Windows Server 2008 R2 Service Pack 1 Windows Server 2008 R2 Enterprise Windows Server 2008 R2 Datacenter Windows Server 2008 R2 Standard

Symptoms

You notice that Lightweight Directory Access Protocol (LDAP) or Kerberos responses from the domain controller are delayed by 2 to 5 seconds. When the issue occurs, the Lsass.exe process CPU usage is low (even lower than usual).

Around the same time (but up to a 4-hour offset), you may receive Netlogon warning event 5807. This event indicates that many client IP addresses couldn’t be mapped to configured subnet definitions in Active Directory:As noted in the event, you may also receive many entries that have NO_CLIENT_SITE: in the Netlogon log when it is configured.

Cause

These LDAP ping requests are unexpectedly exhausting all available threads for LDAP requests and Kerberos requests. The delayed response may cause clients to retry the LDAP ping (DC Locator) and Kerberos requests, and this makes the situation worse. For technical details, please visit the "More Information" section.

Resolution

This update adds the "Specify address lookup behavior for DC locator ping" Group Policy setting for Windows 7 and Windows Server 2008 R2. After the update is installed, the policy setting is available in the following location:

Computer Configuration\Administrative Templates\System\Net Logon\DC Locator DNS RecordsThe Group Policy setting added by this update enables administrator to control how domain controllers perform address lookups. The policy setting must be applied to domain controllers. You can set three values for the Group Policy setting:

  • 0 - Domain controllers will never perform address lookups.
  • 1 - This is the default behavior. Domain controllers will perform an exhaustive address lookup to discover additional client IP addresses.
  • 2 - Domain controllers will perform a fast, DNS-only address lookup to discover additional client IP addresses.

Policy Screenshot

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website:

http:⁠//support.microsoft.com/contactus/?ws=support Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Note This update is also applicable for Windows 7 to enable your to use Remote Server Administration Tools. The update should be installed on all domain controllers in all forests that response time is slow. Generally, they are the domain controllers in the forest root domains. You can also install the update on the computers that you use to manage group policies.

PrerequisitesTo apply this hotfix, you must have Service Pack 1 installed. For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry informationTo use the update in this package, you do not have to make any changes to the registry.

Restart requirementYou may be prompted to restart the computer after you apply this hotfix.

Update replacement informationThis update does not replace a previously released update.

File information

The global version of this update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files

Windows 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version Product Milestone Service branch
    6.1.760
    1.22xxx    		 Windows 7 and Windows Server 2008 R2 SP1 LDR

For all supported x86-based versions of Windows 7

File name File version File size Date Time Platform
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 03:07 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:10 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 207,360 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:07 Not applicable
Netmsg.dll.mui 6.1.7601.22582 231,936 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 247,808 27-Jan-2014 02:59 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 02:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 02:09 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:10 Not applicable
Netmsg.dll.mui 6.1.7601.22582 226,816 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:07 Not applicable
Netmsg.dll.mui 6.1.7601.22582 196,608 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:12 Not applicable
Netmsg.dll.mui 6.1.7601.22582 231,936 27-Jan-2014 03:03 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 03:05 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,120 27-Jan-2014 02:56 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:11 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,040 27-Jan-2014 03:02 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 216,576 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 5,120 27-Jan-2014 03:11 Not applicable
Netmsg.dll.mui 6.1.7601.22582 125,952 27-Jan-2014 03:02 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 5,120 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 120,320 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 03:05 Not applicable
Netmsg.dll.mui 6.1.7601.22582 193,024 27-Jan-2014 02:57 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,552 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 217,088 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:06 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,552 27-Jan-2014 02:57 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 225,792 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:10 Not applicable
Netmsg.dll.mui 6.1.7601.22582 203,776 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:11 Not applicable
Netmsg.dll.mui 6.1.7601.22582 199,168 27-Jan-2014 03:02 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:12 Not applicable
Netmsg.dll.mui 6.1.7601.22582 194,560 27-Jan-2014 03:03 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 4,608 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 86,528 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 4,608 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 89,088 27-Jan-2014 02:59 Not applicable
Ntdsa.dll 6.1.7601.22582 45,568 27-Jan-2014 02:12 x86
Ntdsa.mof Not applicable 227,765 05-Nov-2010 01:54 Not applicable
Ntdsai.dll 6.1.7601.22582 2,025,472 27-Jan-2014 02:12 x86
Netlogon.adml Not applicable 63,245 27-Jan-2014 02:56 Not applicable
Netlogon.adml Not applicable 48,320 27-Jan-2014 02:59 Not applicable
Netlogon.adml Not applicable 44,781 27-Jan-2014 02:57 Not applicable
Netlogon.adml Not applicable 49,434 27-Jan-2014 02:56 Not applicable
Netlogon.adml Not applicable 83,244 27-Jan-2014 02:57 Not applicable
Netlogon.adml Not applicable 40,173 27-Jan-2014 02:09 Not applicable
Netlogon.adml Not applicable 47,831 27-Jan-2014 02:59 Not applicable
Netlogon.adml Not applicable 44,523 27-Jan-2014 02:56 Not applicable
Netlogon.adml Not applicable 51,799 27-Jan-2014 03:01 Not applicable
Netlogon.adml Not applicable 53,878 27-Jan-2014 02:55 Not applicable
Netlogon.adml Not applicable 51,709 27-Jan-2014 03:00 Not applicable
Netlogon.adml Not applicable 48,668 27-Jan-2014 02:59 Not applicable
Netlogon.adml Not applicable 50,348 27-Jan-2014 03:00 Not applicable
Netlogon.adml Not applicable 45,192 27-Jan-2014 02:58 Not applicable
Netlogon.adml Not applicable 43,853 27-Jan-2014 02:55 Not applicable
Netlogon.adml Not applicable 45,070 27-Jan-2014 02:59 Not applicable
Netlogon.adml Not applicable 48,317 27-Jan-2014 02:58 Not applicable
Netlogon.adml Not applicable 47,859 27-Jan-2014 02:55 Not applicable
Netlogon.adml Not applicable 45,685 27-Jan-2014 02:58 Not applicable
Netlogon.adml Not applicable 69,027 27-Jan-2014 02:59 Not applicable
Netlogon.adml Not applicable 45,983 27-Jan-2014 03:00 Not applicable
Netlogon.adml Not applicable 43,974 27-Jan-2014 03:01 Not applicable
Netlogon.adml Not applicable 36,178 27-Jan-2014 02:58 Not applicable
Netlogon.adml Not applicable 37,216 27-Jan-2014 02:57 Not applicable
Netlogon.admx Not applicable 18,356 16-Jan-2014 07:43 Not applicable
Netlogon.dll 6.1.7601.22582 572,416 27-Jan-2014 02:12 x86
Nlsvc.mof Not applicable 2,873 10-Jun-2009 21:29 Not applicable

For all supported x64-based versions of Windows 7 and Windows Server 2008 R2

File name File version File size Date Time Platform
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 207,360 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 231,936 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 247,808 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 02:32 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 02:31 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 226,816 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 196,608 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 231,936 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,120 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,040 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 216,576 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 5,120 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 125,952 27-Jan-2014 05:13 Not applicable
Expand.exe.mui 6.1.7601.22582 5,120 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 120,320 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 193,024 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,552 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 217,088 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,552 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 225,792 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 203,776 27-Jan-2014 05:13 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 199,168 27-Jan-2014 05:12 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 194,560 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 4,608 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 86,528 27-Jan-2014 05:11 Not applicable
Expand.exe.mui 6.1.7601.22582 4,608 27-Jan-2014 05:21 Not applicable
Netmsg.dll.mui 6.1.7601.22582 89,088 27-Jan-2014 05:13 Not applicable
Ntdsa.dll 6.1.7601.22582 68,608 27-Jan-2014 02:37 x64
Ntdsbmsg.dll.mui 6.1.7601.22582 19,968 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 58,486 27-Jan-2014 05:13 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 796,672 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 25,550 27-Jan-2014 04:53 Not applicable
Rules.ad.xml Not applicable 8,368 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 24,064 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 61,684 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 880,640 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 24,069 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 7,695 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 19,968 27-Jan-2014 02:32 Not applicable
Ntdsctrs.ini Not applicable 54,286 27-Jan-2014 02:32 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 788,992 27-Jan-2014 02:31 Not applicable
Report.ad.xml Not applicable 22,929 27-Jan-2014 02:32 Not applicable
Rules.ad.xml Not applicable 7,255 27-Jan-2014 02:31 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 23,552 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 60,800 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 879,616 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 24,503 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 8,031 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 24,064 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 61,502 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 893,952 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 24,821 27-Jan-2014 04:54 Not applicable
Rules.ad.xml Not applicable 8,168 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 19,456 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 58,156 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 839,680 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 25,482 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 8,284 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 20,992 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 58,590 27-Jan-2014 05:13 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 868,352 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 24,090 27-Jan-2014 04:54 Not applicable
Rules.ad.xml Not applicable 8,177 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 12,800 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 40,580 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 562,176 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 23,027 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 8,891 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 13,312 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 40,034 27-Jan-2014 05:13 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 535,040 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 23,790 27-Jan-2014 04:54 Not applicable
Rules.ad.xml Not applicable 8,293 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 22,528 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 63,530 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 849,408 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 23,900 27-Jan-2014 04:54 Not applicable
Rules.ad.xml Not applicable 7,839 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 21,504 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 58,990 27-Jan-2014 05:13 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 849,920 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 24,779 27-Jan-2014 04:53 Not applicable
Rules.ad.xml Not applicable 8,332 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 22,016 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 57,834 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 843,264 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 24,297 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 7,821 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 23,552 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 60,310 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 865,792 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 24,922 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 8,115 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 20,992 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 57,258 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 823,296 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 27,906 27-Jan-2014 04:56 Not applicable
Rules.ad.xml Not applicable 10,526 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 21,504 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 59,230 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 799,232 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 24,062 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 7,623 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 18,944 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 54,780 27-Jan-2014 05:13 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 790,528 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 23,889 27-Jan-2014 04:55 Not applicable
Rules.ad.xml Not applicable 7,635 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 9,728 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 34,782 27-Jan-2014 05:13 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 438,272 27-Jan-2014 05:06 Not applicable
Report.ad.xml Not applicable 22,757 27-Jan-2014 04:54 Not applicable
Rules.ad.xml Not applicable 7,024 27-Jan-2014 05:17 Not applicable
Ntdsbmsg.dll.mui 6.1.7601.22582 9,728 27-Jan-2014 05:19 Not applicable
Ntdsctrs.ini Not applicable 36,464 27-Jan-2014 05:14 Not applicable
Ntdsmsg.dll.mui 6.1.7601.22582 446,464 27-Jan-2014 05:07 Not applicable
Report.ad.xml Not applicable 22,781 27-Jan-2014 04:56 Not applicable
Rules.ad.xml Not applicable 7,059 27-Jan-2014 05:17 Not applicable
Ntdsa.mof Not applicable 227,765 05-Nov-2010 01:54 Not applicable
Ntdsai.dll 6.1.7601.22582 2,753,024 27-Jan-2014 02:37 x64
Netlogon.adml Not applicable 63,245 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 48,320 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 44,781 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 49,434 27-Jan-2014 05:11 Not applicable
Netlogon.adml Not applicable 83,244 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 40,173 27-Jan-2014 02:32 Not applicable
Netlogon.adml Not applicable 47,831 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 44,523 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 51,799 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 53,878 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 51,709 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 48,668 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 50,348 27-Jan-2014 05:11 Not applicable
Netlogon.adml Not applicable 45,192 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 43,853 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 45,070 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 48,317 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 47,859 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 45,685 27-Jan-2014 05:11 Not applicable
Netlogon.adml Not applicable 69,027 27-Jan-2014 05:11 Not applicable
Netlogon.adml Not applicable 45,983 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 43,974 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 36,178 27-Jan-2014 05:10 Not applicable
Netlogon.adml Not applicable 37,216 27-Jan-2014 05:11 Not applicable
Netlogon.admx Not applicable 18,356 16-Jan-2014 07:43 Not applicable
Netlogon.dll 6.1.7601.22582 705,536 27-Jan-2014 02:37 x64
Nlsvc.mof Not applicable 2,873 10-Jun-2009 20:47 Not applicable
Netlogon.dll 6.1.7601.22582 572,416 27-Jan-2014 02:12 x86
Nlsvc.mof Not applicable 2,873 10-Jun-2009 21:29 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 03:07 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:10 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 207,360 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:07 Not applicable
Netmsg.dll.mui 6.1.7601.22582 231,936 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 247,808 27-Jan-2014 02:59 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 02:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,632 27-Jan-2014 02:09 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:10 Not applicable
Netmsg.dll.mui 6.1.7601.22582 226,816 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:07 Not applicable
Netmsg.dll.mui 6.1.7601.22582 196,608 27-Jan-2014 02:58 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:12 Not applicable
Netmsg.dll.mui 6.1.7601.22582 231,936 27-Jan-2014 03:03 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 03:05 Not applicable
Netmsg.dll.mui 6.1.7601.22582 197,120 27-Jan-2014 02:56 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:11 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,040 27-Jan-2014 03:02 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 216,576 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 5,120 27-Jan-2014 03:11 Not applicable
Netmsg.dll.mui 6.1.7601.22582 125,952 27-Jan-2014 03:02 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 5,120 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 120,320 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,144 27-Jan-2014 03:05 Not applicable
Netmsg.dll.mui 6.1.7601.22582 193,024 27-Jan-2014 02:57 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,552 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 217,088 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,168 27-Jan-2014 03:06 Not applicable
Netmsg.dll.mui 6.1.7601.22582 215,552 27-Jan-2014 02:57 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 7,680 27-Jan-2014 03:09 Not applicable
Netmsg.dll.mui 6.1.7601.22582 225,792 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:10 Not applicable
Netmsg.dll.mui 6.1.7601.22582 203,776 27-Jan-2014 03:01 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:11 Not applicable
Netmsg.dll.mui 6.1.7601.22582 199,168 27-Jan-2014 03:02 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 6,656 27-Jan-2014 03:12 Not applicable
Netmsg.dll.mui 6.1.7601.22582 194,560 27-Jan-2014 03:03 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 4,608 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 86,528 27-Jan-2014 03:00 Not applicable
Bootfix.bin Not applicable 1,024 09-Jul-2013 05:41 Not applicable
Expand.exe.mui 6.1.7601.22582 4,608 27-Jan-2014 03:08 Not applicable
Netmsg.dll.mui 6.1.7601.22582 89,088 27-Jan-2014 02:59 Not applicable

      

Status

Microsoft has created an updated binary and policy settings to enable administrators to control how NetBT is used to process LDAP pings.

More Information

When a domain controller receives a LDAP User Datagram Protocol (UDP) ping, the domain controller performs a client IP address lookup to find a matching subnet definition in Active Directory in order to provide the client with the corresponding logon site name.

If the domain controller cannot find a matching subnet for the client IP, it performs its own name resolution with the client's NetBIOS name for potentially finding a different IP having a subnet match.

The name resolution is performed in accordance with the domain controller's available resolution mechanism. In addition to DNS, WINS and NetBIOS may also be used, including broadcasts. According to the name resolution response or time-out, the related LDAP ping is locking one of the threads of the limited Active Thread Queue (ATQ) pool. Many of these LDAP pings over a longer time may constantly exhaust the ATQ pool. Because the same pool is required for regular LDAP and Kerberos requests, the domain controller becomes almost unavailable to users.

The domain controllers stop responding to the following workloads when the worker thread pool is exhausted, because they all share the same ATQ worker thread pool:

  • LDAP pings
  • LDAP queries
  • Kerberos

Failing those three core operations would cause many transitive errors on remote clients, applications, and domain controllers.

You may also observe the following symptoms:

  • Because the domain controller cannot perform workloads in this situation, CPU usage is lower than usual. (when Baseline Monitoring for comparison is in place)
  • The NTDS\ATQ Threads LDAP counter in Perfmon is equal to NTDS\ATQ Threads Total.
  • Domain controllers take about 2 seconds to service LDAP pings, as illustrated in the NETLOGON.LOG when debug logging is enabled by using "nltest /dbflag:0x2080FFFF." The log also contains frequent entries that contain "NO_CLIENT_SITE."

  For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Workaround

Before this update is installed, the following workarounds were identified as avoiding the problem: