Secondary GID not working with ADlookup

Recently we had a case where users from Windows 7, NFS client were unable to access the NFS share. Adlookup was set up properly. And changing the setting to fetch the information from Windows 2003, User name mapping server resolved the issue. Note: We did not change any settings on the Unix NFS server Current…

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Concepts on multiple user mapping

We do get a lot of questions on multiple users mapping between Windows and Unix users. I have tried to list the questions and the answers for them through this blog: How does multiple user name mapping works <Answer> We can map a Windows-based account only to a single UNIX-based account, buta single Unix based…

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Permission Denied while trying accessing the file from UNIX clients

  There was an issue in Windows 2008 R2, where the Unix clients were unable to honor the NTFS style of permission even though the “KeepInheritance” registry key was turned on the NFS server. The NFS server was still using the Unix style of permission. We recently had the hotfix released for this issue: http://support.microsoft.com/kb/2485529…

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Getting permission denied error intermittently from Unix clients

Recently we got a case where customer informed that intermittently he is getting access denied error from the Unix clients. This happens while the users from Unix clients are trying to list the content inside the NFS share or read\write into a file.   The environment was: Windows 2003 R2, 2 node cluster, Windows 2003…

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User name mapping not working through ADlookup

Recently we had an issue where User Name Mapping were not working through ADlookup. Initially it looks to be some issue with either the UID\GID not been set properly or some configuration issue. While we were troubleshooting on the issue, we confirm that the correct UID\GID has been populated in the AD. The netbios name…

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Important Tips on NFS (Part 2)

Why I am unable to change ownership from Windows clients?   This is due to the default Unix style behavior. In Unix side only root can delete files which he is not the owner.  Hence from Windows clients even if the user has full permission (i.e. if the file has the permission 777 from Unix),…

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Important Tips on NFS (Part 1)

How can we map users in Windows 2008? In windows 2008\2008 R2, we have the following options: 1.    Fetching maps from a windows 2003\2003 R2 mapping server 2.    Using Adlookup for mapping domain accounts 3.    Using ADLDS for local accounts Why the mapping information is not getting saved through GUI: The issue is more common…

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Unable to fetch User name mapping information from passwd and group file

Recently we got a case where customer was having issue fetching the maps from the group and passwd file. Customer was trying to configure maps on a Windows 2003 R2 box.   While troubleshooting, we did check the below things: 1.    User name mapping service (properties- General\log on\dependencies) 2.    File version for mapavc.exe 3.    Unix…

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How to configure users maps local users on Windows 2008

Recently we got a case where customer was looking for mapping local users on Windows 2008. The first hindrance which the customer realized was “Unavailability of User Name Mapping feature on Windows 2008”. One of the ways to maps local users in windows 2008 is through ADLDS which has been documented on the article below:…

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Replacing everyone group through Registry – NFS

We recently had a query, where customer was trying to configure the following registry key so that the NTFS permission for the files which are created from Unix client on a NFS share changes from Everyone group to any group as specified in the below registry.   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ServerForNFS\CurrentVersion\Mapping\EveryoneGroup   So we did some testing on…

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