windows network password strength test

Greetings EE Gods...

I am starting in a new company, and looking for a tool.

This tool needs to be able to run through the established logins on a domain, and check to make sure the passwords are not being too weak.  If they are, i have to report it to their leadership, so they can change to a stronger password.  

This tool must be able to test local computers too for local logins as well.

Help?
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Evan CutlerVolunteer Chief Information OfficerAsked:
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netbonesCommented:
Try GFI LanGuard:

http://articles.techrepublic.com.com/5100-22_11-5110119.html

Or, just enable strong passwords and force everyone to change their password at next login.
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Evan CutlerVolunteer Chief Information OfficerAuthor Commented:
well, how do I check the passwords to see if they're not just XMAS'd (ie.  !@#$%12345qwertQWERT)


Thanks.
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netbonesCommented:
I definetely gave you the wrong link - sorry! Ii cross-posted to another question and swapped the answeres by accident.

You need something like GFI Languard to audit the passwords.
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MikeGGGCommented:
arcee123,
I think you are going wrong way.
You need to create a new password policy, enable minimal lengh of for example 8 and requirement of extra symbols like &! etc.
Users with weak passwords will be prompted to change it next time they log in.
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Rich RumbleSecurity SamuraiCommented:
First, apply the GPO to stop storing the LanMan hash: http://support.microsoft.com/kb/299656
Then force users to change their passwords. Make your minimum password 10 and add alpha and extra characters as a requirement. This will thwart most if not all Rainbow-table attacks.
Then download JohnTheRipper, or cain&able from oxid.it, dump your hashes from your AD (after forcing users to change their passwords) using FgDump or Pwdump6. Import them into cain&able, or run them against jtr with the jumbo patch (you can find this pre-compiled on the internet) and run john.exe passwords.txt -format=NT

This however does not stop programs that "pass the hash" which require no password cracking so it doesn't matter how strong a password is. These programs however require that they gain administrator access to do so, see gsecdump + msvctl and the "pass the hash toolkit"
-rich
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ChiefITCommented:
As an administrator of a domain, the password policy should be your responsibility. Authentication is crucial to IT security and shouldn't lie strictly upon the clients shoulders.

So, I agree with some comments above by enforcing a password policy and also disabling LMhash authentication. Creating the group policy object is easy, quick ,and will allow you to concentrate on other facets of being an IT admin.

A free tool for checking passwords from microsoft is Microsoft Baseline Security Analyzer: (MBSA)
http://technet.microsoft.com/en-us/security/cc184924.aspx
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