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Vista: Can’t access NAS,MAC, Linux, Samba and Win98

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Vista: Can’t access NAS,MAC, Linux, Samba and Win98

Postby chicagotech » Sun Mar 04, 2007 10:18 am

Q: I m having trouble mapping a drive to an NT4 network share, when ever i try mapping a drive to a shared resource on an NT4 machine it does not reconise my password, Yet it i try from an XP machine it works fine..

I can ping the device
I can see by browsing to it

Just when ever i try connecting too it my credentials are rejected

Any suggestions?

A: By default, Vista uses the NTLMv2 authentication which is a 128-bit encrypted authentication protocol. The fixed can be found this link: Solved: share between Vista and Snap Server - http://www.chicagotech.net/netforums/vi ... .php?t=306
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Postby chicagotech » Sun Mar 11, 2007 11:36 am

Thank you for the detail feedback.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"Mike" <Mike> wrote in message news:B9C60AB8-4137-4642-B124-7815381B4B41@microsoft.com...
Thanks Rob,

I found the answer - thanks for your help.

If anyone else has the same problem, it's worth noting the following points;

1. the problem seems to be caused by Vista defaulting to a new version of
NTLM than the Samba operating system used by many NAS devices.

2. The problem can be solved by changing settings in the security policy to
allow a less restrictive set of protocols/versions - in Vista versions other
than Home Premium, this can be done by running secpol.msc (see links in
Robert's reply below and also this one
linux-watch.com/news/NS4434907782.html, which gives quite a good
explanation of the problem).

3. In Vista Home Premium, secpol.msc doesn't exist, so you need to change a
registry setting, using regedit. The way to do it is as follows (many thanks
to Jimmy Brush on forums.techarena.in/showthread.php?t=670498):

- Click start
- Navigate to the 'run' command - probably in Programs\Accessories
- Type: regedit
- Press enter
- In the left, expand these folders:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\

- In the left, click on the folder named:

Lsa

- In the right, double-click "LmCompatibilityLevel"
- Type the number 1 (to replace the 3) and press enter
- Restart your computer

Thanks to all for your help.

Mike

"Robert L [MVP - Networking]" wrote:

> This link may help,
>
> Vista: Can’t access NAS,MAC, Linux, Samba and Win98
> http://www.chicagotech.net/netforums/viewforum.php?f=1
>
> Bob Lin, MS-MVP, MCSE & CNE
> Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
> How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
> "Mike" <Mike> wrote in message news:2A84270D-FA38-4E40-A01F-45B51A1953E7@microsoft.com...
> I have a home network of XP Pro PCs and a Terastation NAS device. All the XP
> machines can see each other, share files and printers etc including access to
> the shared folders on the NAS. My new Vista machine can see and access the XP
> machines, including sharing, but I can't get it to access the NAS. All of the
> machines have identical usernames/passwords and all are on the same workgroup.
>
> Any ideas?
>
> thanks,
> Mike
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Postby chicagotech » Tue Mar 20, 2007 2:13 pm

Thank you, Michael.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"Michael A. Bishop (MSFT)" <michael> wrote in message news:Oql%23OFnaHHA.5108@TK2MSFTNGP03.phx.gbl...
There have been a number of posts addressing this which recommend lowering
the security levels in Vista. That is a last-ditch workaround. Please try
to get the other boxes to support better security before turning Vista's
security to lower settings.

Brief background:
Vista, by default, only uses the more secure NTLMv2 to authenticate on file
shares. NTLMv2 has been around for quite a while (Windows NT4 SP4), but a
number of other implementations of the SMB protocol only recently picked it
up. If you are trying to connect to a system which does not support NTLMv2,
an update will be required. If your system supports NTLMv2 but does not use
it by default, a settings change will be required.

If you are using Samba (Linux, OS/X):
- Make sure you have at least version 3.0.23
- Add "client ntlmv2 auth = yes" to your smb.conf (in /etc or /etc/smb)

If you are using a Samba-based NAS device:
- Contact the manufacturer for a firmware upgrade to use version 3.0.23 or
later
- Follow manufacturer's instructions for enabling NTLMv2 through their
configuration interface

If you are using Windows 9X: (Summarized from KB239869, "How to enable
NTLM2 authentication" - http://support.microsoft.com/default.aspx/kb/239869)
- Install the ADCE for Windows 9X -
http://download.microsoft.com/download/ ... ient9x.msi
- You may optionally uninstall the ADCE; uninstalling ADCE does not remove
the files added to enable NTLMv2
- Start > regedit; change
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\LMCompatibility from 0x0
to 0x3.

If none of the above works, *as a last resort*, permit the lower level of
security in Vista:
- On Vista Business, Enterprise, or Ultimate, run secpol.msc; go to "Local
Policies" > "Security Options" > "Network Security: LAN Manager
authentication level" and change from "NTLMv2 responses only" to "LM and
NTLM -- use NTLMv2 session security if negotiated".
- On other SKUs of Vista, Start > regedit; change
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\LMCompatibility from 0x3
to 0x1.
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Postby arielus » Mon Jul 23, 2007 9:52 am

I've done those changes and didn't work, but when I map the network drive, telling the user and pass, it seems to work.

It's strange, when i browse to the shared folder and try to access, i get asked for user and pass, i provide them, it fails, and the username box appears in gray.

Doing it by mapping the drive worked just fine
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Postby chicagotech » Mon Jul 23, 2007 10:09 am

Sounds like permission issue. Have you assigned permission in the security tab. Or this link may help,

Vista Permission Issues
How to: check permissions using Vista icacls command, Reply with quote . ...
http://www.chicagotech.net/vista/vistapermission.htm
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System error 5 when using net view command in Vista

Postby blin » Fri Sep 21, 2007 8:13 pm

Situation: I have a 1TB fireware connecting to USR8200 Firewall/VPN/NAS. It is formatted as FAT32 as required by USR8200. XP computers can map it. However, Vista can't. If I try net view \\192.168.1.1\a command, I would receive System error 5.

Resolution: It works after re-set LM authentication level in Vista to Send LM & NTLM - use NTLMv2 session if negotiated following this link:

Solved: share between Vista and Snap Server
http://www.chicagotech.net/netforums/vi ... .php?t=306
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Postby blin » Fri Sep 21, 2007 8:26 pm

also check these posts:

Access is denied when Vista accesses a FAT32 drive
http://www.chicagotech.net/netforums/vi ... =2790#2790

Vista: Logon failure unknown user name or bad password
http://www.chicagotech.net/netforums/vi ... php?t=1665

System error 1326 has occurred when using net use in Vista
http://www.chicagotech.net/netforums/vi ... php?t=1664
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Postby guest » Fri Jun 06, 2008 8:49 pm

This is another case.

Problem
========
Tried to map a network drive to an older SnapGear NAS on a Vista client.
The logon failed.

Cause
========
Windows Vista defaults to use NTLMv2 authentication protocol which does not
work with your NAS

Resolution
========
Change the default authentication protocol by the steps below:

1. Click Start, type secpol.msc in the Start Search box and press Enter.
2. Expand Local Policies->Security Options.
3. In the right pane, locate "Network security: LAN Manager authentication
level" and double click to open it.
4. Select "Send LM & NTLM - use NTLMv2 session security if negotiated" from
the dropdown list and click OK.
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