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How can I connect to a Samba share with authentication using Windows 7?

We have a bunch of Linux, HP-UX and AIX servers on our network with folders shared using Samba. These are not connected to our Active Directory or anything, we just type a user name and password when we connect to them. They still all work fine from Windows XP, but we've upgraded a couple of machines to Windows 7 and they can't access the shares. You get prompted for a password but it says "The specified network password is incorrect" (it's not).

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See also serverfault.com/questions/91797/… – Mike Toews Jul 26 '12 at 0:11

3 Answers

up vote 11 down vote accepted

1) Run: gpedit.msc

2) Find:

Console Root -> Local Computer Policy -> Computer Configuration -> Windows Settings -> -> Security Settings -> Local Policies ->Security Options

When you're there change the following policies

3) Microsoft network client: Send unencrypted password to third-party SMB server: Switch it to "Enabled".

4) Network security: LAN Manager authentication level: Select the option: Send LM & NTLM - use NTLMv2 session security if negotiated.

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Thanks, this solves the problem. It sounds like we should probably be upgrading samba on all our servers too, but that will take a while... – Colin Pickard Mar 3 '10 at 9:56
doesn't work for me >:( – endolith Jun 10 '11 at 4:22
2  
@ Cy. Instead of running gpedit.msc and doing all that navigation, secpol.msc takes you directly to your security settings. Everything else is correct otherwise.. – user140593 Jun 16 '12 at 20:17
Unless you're running an old version of Samba none of this should be necessary. You're best off upgrading Samba. – user168261 May 17 at 13:11
up vote 1 down vote

I had the same problem. This did the job for me:

Get Vista and Samba to work | TechRepublic

  1. Open the Run command and type "secpol.msc".

  2. Press "continue" when prompted by Vista.

  3. Click on "Local Policies" --> "Security Options"

  4. Navigate to the policy "Network Security: LAN Manager authentication level" and open it.

  5. By default Windows Vista sets the policy to "NTVLM2 responses only". Change this to "LM and NTLM – use NTLMV2 session security if negotiated".

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up vote 3 down vote

If you're running an old version of Samba, it's possible that you're run into this problem. Here is some further discussion. Basically, Windows Vista and 7 disable an old and insecure method of authentication which Samba was using by default. Tweaking the registry setting as described in the article should get it working. Ideally, of course, you would upgrade Samba to a new version, but that might not be possible at the moment.

If this doesn't work, could you post the version of Samba that you're running?

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I did not have a LmCompatibilityLevel key on my Win7 machine. I don't know if creating the key would have worked? The gpedit solution worked for me anyway. – Colin Pickard Mar 3 '10 at 10:02
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What version of Samba is required? Is it a samba configuration issue? – endolith Jun 10 '11 at 4:00

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