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Network Security Focus-Microsoft
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RE: Password complexity - improvement

Subject: RE: Password complexity - improvement
Date: Thu, 16 Aug 2007 18:16:04 +0100

I know we've wandered a little of topic here, but to expand on Thor HoGs
point:

If you apply a password policy GPO to the domain, it will apply only to
accounts authenticated on the domain.

If you apply a password policy GPO to an OU (that contains machine
accounts), it will apply only to local user accounts created on the machines
in that, and subordinate OUs.

It has always been said that if you want different password policies for
different users you need to put them in different domains, either in the
same, or different forests. I believe (but can't test it at the moment) that
this annoyance has been addressed in Windows 2008 such that password
policies can be applied per OU that will only affect the users accounts in
those OUs.

Cheers

James

James D. Stallard, MIoD
Infrastructure Technical Architect
Web: www.leafgrove.com
LinkedIn: www.linkedin.com/in/jamesdstallard





 

-----Original Message-----
From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com] On
Behalf Of Thor (Hammer of God)
Sent: 15 August 2007 21:45
To: Bean, John (DSHS); dubaisans dubai; focus-ms@securityfocus.com
Cc: Knowlton, Jay (DSHS/ISSD)
Subject: RE: Password complexity - improvement

Correct- GPO allows you to specify whether "passwords must meet complexity
requirements" or not. But the actual "complexity requirement"
itself is dictated by passfilt.dll, which lives on the DC that the user
authenticates against when a password is set or changed. If you don't push
out your custom passfilt.dll to all controllers, then the "default"
passfilt.dll will be used when users change or set passwords on those
controllers (the ones not customized).  So, in that respect, it's not
actually at the "domain level," but rather, at the "controller level." 

t

------------
veni, vidi, veni denuo







-----Original Message-----
From: listbounce@securityfocus.com
[mailto:listbounce@securityfocus.com] On Behalf Of Bean, John (DSHS)
Sent: Wednesday, August 15, 2007 9:25 AM
To: dubaisans dubai; focus-ms@securityfocus.com
Cc: Knowlton, Jay (DSHS/ISSD)
Subject: RE: Password complexity - improvement



It is my understanding that your request to enforce all four
properties
can only be enforced on the domain level.  There is no way to have one 
password complexity policy on the domain level and a second more 
password complexity policy on a child OU.

-----Original Message-----
From: listbounce@securityfocus.com
[mailto:listbounce@securityfocus.com]
On Behalf Of dubaisans dubai
Sent: Tuesday, August 14, 2007 11:15 PM
To: focus-ms@securityfocus.com
Subject: Password complexity - improvement

Is there a way to improve the password complexity requirements in 
Windows 2000/2003 servers

The default will enforce 3 of the following 4 properties - Uppercase, 
smallercase, numbers, special-characters.

Is there a way to enforce all 4 properties. I donot want to install 
third-party software

I have read about customising passfilt.dll . Is that recommended. Does 
MS provide a customised passfilt.dll for download and install.

Are there any support issues if I go for something like this ?




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