The second method is to disable the loopback check by setting the DisableLoopbackCheck registry entry. To set the DisableLoopbackCheck registry key, follow these steps:. Right-click DisableLoopbackCheck , and then click Modify. In the Value data box, type 1, and then click OK.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:. To do this, follow these steps on the client computer:. Note You must type each host name on a separate line. Because NTLM reflection protection is part of the fix for this SMB vulnerability, disabling NTLM reflection protection on an affected system will return the system to a vulnerable state for the particular SPN for which the reflection protection was disabled.
The English United States version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time DST bias. Additionally, the dates and times may change when you perform certain operations on the files. GDR service branches contain only those fixes that are widely released to address widespread, critical issues.
QFE service branches contain hotfixes in addition to widely released fixes. In addition to the files that are listed in these tables, this software update also installs an associated security catalog file KB number. Service Pack 1 is integrated into the release version of Windows Server RTM milestone files have a 6. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services.
Privacy policy. This article provides some information about end of support for Windows Server and Windows Server R2. Windows Server and Windows Server R2 are approaching the end of their support lifecycle. This means that as of the dates in the table below there will be no additional:. And more important than this, is you need to document the configuration. Just like everyone else this problem has had me scratching my head for a couple hours.
So remember this issue when diagnosing the dreaded ! Conclusion The loopback check is a good thing, not a bad thing, if you care about security and platform hygiene. Do not disable this feature in production. Todd is also planning to spend some time on this subject in his next netcast. The opinions expressed herein are personal and do not represent those of my employer.
This work is licensed under a Creative Commons License. Welcome to our family! Home About Contact. Search Indexing. So which one should you use? Host file only has those 2 entries in there no conflicts. The network does not have a DNS server - it' just a simple workgroup based setup. I understand that the situation is you can access the server on the local computer by using the following paths:. This problem occurs because Windows Server SP1 and above includes a new security feature named loopback check functionality.
By default, loopback check functionality is turned on in Windows Server SP1, and the value of the DisableLoopbackCheck registry entry is set to 0 zero. To set the DisableLoopbackCheck registry entry to 1, please follow these steps on the client computer:. By default, loopback check functionality is turned on in Windows Server SP1, and the DisableLoopbackCheck registry entry is set to 0 zero. Please refer to the below KB article for more details:.
Hope this helps. Best regards.
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