Error accessing NAS shares

[TomTieDom]

Hello,

I have a DLink DNS-323 NAS device and since I have upgraded my laptop to Windows 7 Enterprise 64 bit I have problems accessing shares.

I am able to map a drive (both manually as via Explorer), but when I try to access the mapped drive I get an error "An unexpected network error occurred". See below an example from the commandline

This happens in all situations:
- When a username and password are required for the share. It does not matter whether the username and password are the same as a user on the laptop or a different one
- When access to the share is open for "ALL"
- Connecting via wireless and cable
- Addressing the devide by IP address, hostname and fully qualified hostname.

From another laptop with Windows XP PRO I still have access like I used to.

C:\>net use z: \\192.168.100.102\Docs /user:xxxxx
The command completed successfully.

C:\>z:
An unexpected network error occurred.

Please Help!

 

[zigzag3143]

Hello,

I have a DLink DNS-323 NAS device and since I have upgraded my laptop to Windows 7 Enterprise 64 bit I have problems accessing shares.

I am able to map a drive (both manually as via Explorer), but when I try to access the mapped drive I get an error "An unexpected network error occurred". See below an example from the commandline

This happens in all situations:
- When a username and password are required for the share. It does not matter whether the username and password are the same as a user on the laptop or a different one
- When access to the share is open for "ALL"
- Connecting via wireless and cable
- Addressing the devide by IP address, hostname and fully qualified hostname.

From another laptop with Windows XP PRO I still have access like I used to.

C:\>net use z: \\192.168.100.102\Docs /user:xxxxx
The command completed successfully.

C:\>z:
An unexpected network error occurred.

Please Help!

I suspect you are using "homegroup" for your networking. Homegroup is for win 7 only networks. Since yoou have XP on the network youo should be using "workgroup" for networking. there is a tutorial for leaving homegroup here. http://www.sevenforums.com/tutorials/43980-homegroup-leave.html?ltr=H


ken

 

[TomTieDom]

I'm not part of a homegroup: "There is currently no homegroup on your network. Because this computer belongs to a domain, you can't create your own homeegroup"

 

[brady]

try disabling ipv6

 

[TomTieDom]

I have now disabled IPv6, but still the same problem

What puzzles me is the fact that I am able to map the drive, so there is no problem with the credentials, but when I try to access the drive it gives a network error. Every once in a while it says something about a remote procedure call that did not succeed.

 

[TomTieDom]

I have made a network dump with Wireshark. I am not an SMB expert so I don't know if the below is normal behaviour.

Can somebody help me?

1. I map the directory \\NAS\DIR on drive letter Z:\
2. Win7 does a Session Setup twice
3. Win7 tries to open \desktop.ini. The NAS says it does not exist
4. Win7 tries to open '\'. The NAS opens it and says it's a directory.
5. Win7 does a Session Setup four times
6. Win7 gives the error "Z:\ is not accessible - An unexpected network error occurred."

No. Time Source Destination Protocol Info
32 14.963008 192.168.100.146 192.168.100.102 SMB Negotiate Protocol Request
33 14.977313 192.168.100.102 192.168.100.146 TCP microsoft-ds > 49568 [ACK] Seq=1 Ack=160 Win=6432 Len=0
34 14.983507 192.168.100.102 192.168.100.146 SMB Negotiate Protocol Response
35 15.183500 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=160 Ack=96 Win=17425 Len=0
43 22.724227 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user; Tree Connect AndX, Path: \\NAS\DIR
44 22.755653 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response; Tree Connect AndX
45 22.954996 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=368 Ack=214 Win=17307 Len=0
46 23.255229 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
48 23.267427 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
49 23.270984 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
50 23.277999 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
51 23.476956 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=568 Ack=406 Win=17115 Len=0
52 23.591795 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
53 23.602934 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
54 23.603464 192.168.100.146 192.168.100.102 SMB NT Create AndX Request, Path: \desktop.ini
55 23.617925 192.168.100.102 192.168.100.146 SMB NT Create AndX Response, FID: 0x0000, Error: STATUS_OBJECT_NAME_NOT_FOUND
56 23.620749 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
57 23.645069 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
58 23.645242 192.168.100.146 192.168.100.102 SMB NT Create AndX Request, FID: 0x12a6, Path: \
59 23.647636 192.168.100.102 192.168.100.146 SMB NT Create AndX Response, FID: 0x12a6
60 23.651410 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
61 23.677782 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
62 23.845908 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
63 23.855544 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
64 23.864421 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
65 23.873746 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
66 23.876494 192.168.100.146 192.168.100.102 SMB Session Setup AndX Request, User: DOMAIN\user
67 23.891579 192.168.100.102 192.168.100.146 SMB Session Setup AndX Response
68 24.092971 192.168.100.146 192.168.100.102 TCP 49568 > microsoft-ds [ACK] Seq=1374 Ack=1128 Win=16393 Len=0

 

[spamnchips]

There is an apparant error with Windows 7. I opened a request with microsoft professional Help some weeks ago on this subject and they have been delving into my machine remotely to try and resolve the problem. I have three PC's on my home network. One using Windows XP, one with Vista and one with Windows 7. The XP and Vista macj=hine can both access my NAS either by mapping or from the network ico. Windows 7 will only access the NAS as a mapped drive.

Microsoft have made network traces from my Visat and Win 7 machines and advise that Win 7 sends the correct signals to the NAS but onlt get errors back. The same apparantly happens with the Vista machine but Vista ignores the errors and access the drive. I have tried unsuccessfully to obtain new firmware for the NAS and am waiting to see if Microsoft have any ideas. There are evidently more Security and Permissions additions in Win 7 over and above Vista. I suggest these are the problem.

It may be that we have to stick with the mapped drive route if MS do not offer any add ons.

 

[TomTieDom]

Microsoft have made network traces from my Visat and Win 7 machines and advise that Win 7 sends the correct signals to the NAS but onlt get errors back. The same apparantly happens with the Vista machine but Vista ignores the errors and access the drive. I have tried unsuccessfully to obtain new firmware for the NAS and am waiting to see if Microsoft have any ideas. There are evidently more Security and Permissions additions in Win 7 over and above Vista. I suggest these are the problem.

It may be that we have to stick with the mapped drive route if MS do not offer any add ons.

Thanks for your reaction. I still have not solved my problem and the mapped drive workaround does not work either. Please keep me posted from any progress you make with Microsoft. I am also willing to provide them with my network traces.

 

[aem]

Instead of mapping via command line. Can you go to start > type in the search box \\192.168.100.102\Docs and hit enter. See if it works.

 

[TomTieDom]

No, but I get a different errormessage:
"\\192.168.100.102\Docs" is not accessible. You might not have permission to use this network resource. Contact the network administrator of this server to find out if you have access permissions. - The system detected a possible attempt to compromise security. Please ensure that you can contact the server that authenticated you."

All shares on the NAS are open is open for ALL.

I find the last part of this error message strange: "Please ensure that you can contact the server that authenticated you." Which server has authenticated me?

 

[aem]

I don't know if this is W7 or the NAS, but it seems to me like a setting on the NAS. Do you have another machine to test the connection?

 

[TomTieDom]

The problems started on this laptop when I upgraded from Windows 7 to XP. Another laptop with WinXP still works.

 

[rmu]

unexextep network error whne acccessing SMB share with windows 7

Hello,

when I try to access an SMB share on a NAS or any Samba based system with a Windows 7 PC wich is member of a domain, I get an "Unexpexted network error". In my cas, the problem was comming from the security policies defined in our domain. The faulty policies was "Microsoft network client: Digitally sign communications (always)” which was enabled. After disabling this policy (located in Computer Configuration/Policies/Windows Settings/Security Settings/Local Policies/Security Options) the access to SMB share works perfectly.

Best regards