I also have some probably not applicable information to add. J Actually, I consider it discussion enrichment.

 

Anyways, I’ve seen strange things related to authentication, DEP, and other security enhancements. They are different and possibly unrelated, but they seem very close in the family of problems and exhibit similar or exact symptoms.

 

We’ve experienced some similar things as well Al. DEP was impacting the way that the OS interacted with a couple of Apps that were accessed via FQDN paths. A protection prompt would kick in until we disabled DEP (for certain clients) as you described. Interestingly enough, that did not work for both apps. It turned out that Windows/Internet Explorer security was kicking in. Adding the UNC path of the share hosted on the server to the Trusted Sites in IE removed the security prompt. It appears that IE security settings treated FQDN paths with further restrictions that caused DEP to kick in. Somewhat similar, I just recently found out why it was that certain sites accessed through IE have been prompting users for passwords. Though IIS was set for integrated authentication and the users certainly had rights to the intranet sites, authentication prompts were still occurring. It turns out that if a FQDN was used to access the site, credential were not being passed and the site was being treated as external to the domain. If just the hostname was used, no prompt would occur and successful authentication would automatically occur. The site was treated as an intranet site within IE. http://www.windowsitpro.com/Web/Article/ArticleID/22279/22279.html Though this article limits this issue to specific version of IE and IIS, I find it applicable to other versions that I’ve test with as high as IIS6.0 and IE7.0 Beta. Though all of these things may be unrelated, the relationship between IE, Windows Explorer, FQDN paths, & Adrião’s final resolution makes me think that there is connection between all of these things at some level. Maybe it’s just the axiom that more security = less usability. J

 

Ushruf

 

 

 

 


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Al Garrett
Sent: Friday, June 30, 2006 11:10 AM
To: [email protected]
Subject: RE: [ActiveDir] Windows 2003 sp1 DNS problem

 

Probably not applicable to this subject but I had a problem with SP1 when it added in Data Execution Prevention.

 

A new tab labeled Data Execution Prevention is present under System Properties – Advanced – Performance Settings that tells the O/S not to run certain potentially harmful programs and scripts. I have to support a java-based application and it was driving us nuts until we adjusted DEP for Windows apps only.

 

Keep another SP1 item to keep an eye on......

 

-----Original Message-----
From: Guy Teverovsky [mailto:[EMAIL PROTECTED]
Sent: Friday, June 30, 2006 11:46 AM
To: [email protected]
Subject: RE: [ActiveDir] Windows 2003 sp1 DNS problem

 

 

I have been bitten by it with databases, but my understanding is that it is relevant to any authentication attempt that tries to access a resource that does not have a registered SPN.

http://support.microsoft.com/?id=887993

Now that I think about it, the right way would probably be to make sure the required SPN is registered for the server in question. The KB above can help determining whether it is an SPN issue. If it is, after registering the SPN, the DisableLoopbackCheck reg value can be set back to 0 or deleted.

 

Guy

 


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Abouelnasr, Jerry
Sent: Friday, June 30, 2006 11:54 AM
To: [email protected]
Subject: RE: [ActiveDir] Windows 2003 sp1 DNS problem

 

Is it your experience that this applies to UNC file paths as well?

 


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Guy Teverovsky
Sent: Friday, June 30, 2006 9:57 AM
To: [email protected]
Subject: RE: [ActiveDir] Windows 2003 sp1 DNS problem

 

Another thing that is worth mentioning is the loopback check that has been enforced since W2K3 SP1.

Try disabling the loopback check or specifying additional FQDNs using one of the methods in the following KB:

http://support.microsoft.com/?kbid=896861

 

Guy


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Friday, June 30, 2006 8:14 AM
To: [email protected]
Cc: [email protected]; [EMAIL PROTECTED]
Subject: RE: [ActiveDir] Windows 2003 sp1 DNS problem

 


Thanks a lot, It did not work. I used additional names, disabled strict name checking.... But it is still the same.
I am almost aware it´s a         SP1 security function. But there must be a way to disable that.....
I´m still waiting new tips...


Adrião.....

 





       

"Grillenmeier, Guido" <[EMAIL PROTECTED]>
Enviado Por: [EMAIL PROTECTED]

29/06/2006 20:40

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Assunto

RE: [ActiveDir] Windows 2003 sp1 DNS problem

 

 

 




I wasn't aware that this was a change in SP1, but it sounds as if StrictNameChecking is enabled on your server after you've added SP1
(http://support.microsoft.com/default.aspx?scid=kb;en-us;281308)
 
You ca disable it in general by configuring the DisableStrictNameChecking reg-key as the KB above explains.  However, this would allow to access the server via _any_ name.   I typically suggest to use the reg-keys to limit additional names to those you really want:
 
DNS:
HKLM\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters\AlternateComputerNames (Multi-SZ)
NetBios:
HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\Parameters\OptionalNames (Multi-SZ)
 
This can also be done via the Win2003 version of NETDOM:
NETDOM COMPUTERNAME <current NetBIOS or DNS name> /add:<additional FQDN name>
 
/Guido


From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent:
Donnerstag, 29. Juni 2006 21:38
To:
[email protected]
Cc:
[EMAIL PROTECTED]
Subject:
[ActiveDir] Windows 2003 sp1 DNS problem



Hallow all.


       I need help in a problem I have after installing Service Pack 1


       This is the case:


       I have a windows 2003 Server (I Will call it SERVER01), without service pack 1

       I created a dns name like this


       aplicacao.mycompany.com


       Before installing SP1, when I called locally


       \\aplicacao.mycompany.com



       It opened shared folders perfectly


       Now , after SP1, if I call \\aplicacao.mycompany.com   It asks for a user and password. I don´t know witch password or user is that...


       If I call   \\SERVER01.mycompany.com, it works.....


       What was changed after installing SP1?


       how can I correct that?


Adrião

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