I am having a problem with domain user/group access to the network shares on both of my QNAPs (from Win7, XP, and S2008R2). I recently upgraded the firmware on my TS-419U to 3.3.6 Build 1109T and my TS-809U to 3.3.6 Build 1110T. Before the upgrade they were both around 2.3.X. The access rights were working fine before the upgrade.
Now, when I try to use the net use command with my domain account I receive this error:
System error 1326 has occurred.
Logon failure: unknown user name or bad password.
They both work fine if I use the admin local account. I saw the thread about IP works but hostname does not - I get the same results on both. I tried troubleshooting on the TS-419U.
I wasn't worried about re-creating the access rights so I tried changing it to a workgroup and joining it back to the domain. The domain join succeeded. I granted a domain group that I am a member of to the share. I got the error message above. I then tried adding my domain user account to the share directly. Same thing. I enabled logging and I am only seeing a login failure when my account password is incorrect. It does not log when my password is correct but access to the share does not work.
What I found interesting is that our domain accounts lock out after three failed attempts. When I spammed the net use command about 10 times, my AD account did not lock out (same error message as above at each attempt), but when i typed my password incorrectly, after the third attempt my AD account did lock out, and it still failed to connect to the share.
In the Access Rights\Shared Folders\Access Control of the share I am trying to give access, I can see both the Domain Users and Domain Groups sections and have granted both my domain account and domain group the same Full Control access that I had in the previous firmware.
One other thing that I noticed was that before the firmware upgrade, I was able to browse \\QNAPNASNAME and by default it would show the standard QNAP shares (QDownload, QMultimedia, etc.) without a password. When I double clicked on a folder it would then prompt for a password. After the firmware upgrade it now asks for a password just going to the \\QNAPNASNAME share.
I have tried creating a brand new share and I am still getting the same results.
I am not sure how to troubleshoot any further.
Thanks in advance.