Wednesday, September 11, 2013

IE 10 Prompting for credentials - Windows Authentication

Today I responded to a customer who has an internal intranet.  The customer has no issues accessing the intranet page from IE7, IE8, or IE9 - However when upgrading to Internet Explorer 10, the users are now getting prompted for username and password using windows authentication even though the user account the user is logged in with has access to the website hosted on Internet Information Services (IIS).

The following screenshot shows the logon authentication prompt presented from Internet Explorer 10 when attempting to access the organisations internal intranet.


Internet Explorer 10 by default allows credentials to automatically pass through to all "intranet" pages, however "internet" pages do not pass through credentials for security reasons.  To see if Internet Explorer is treating the page as an "intranet" page or "internet" page, right click on the page error message (depending if you typed your credentials in or not) and click properties.


In the properties section of the page it will display what zone is currently configured.  As you see below, Internet Explorer is treating the "intranet" page for this customer as an "internet" page and hence the user is getting prompted.


Now one fix for this problem is to simply go to Internet Options, Internet, Custom Level and set the User Authentication --> Logon to "Automatically logon with current user name and password".  Whilst this will solve the problem it will lead to credentials of the current logged in user to pass over the Internet, not such a good idea!


A better fix is to configure your "intranet" page which is being treated as an "internet" page as an "intranet" page within Internet Explorer.  This can be done by going to Internet Options, Local Intranet, Sites, Advanced.


In the advanced page add your local intranet page.

 
Problem fixed - Internet Explorer will no longer prompt for Authentication when accessing the local Intranet.
 
Applying fix to all computers
 
Now you want to apply this configuration to all computers on your domain.  This can be done using Group Policy using the "Site to Zone Assignment List" group policy setting.  This setting is located under:
 
Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel\Security Page\Site to Zone Assignment List
 
 
 In this policy setting enter the intranet address you want to add to the Local Intranet settings as we did manually above along with a value.  The values are represented as follows:

1 = Intranet zone
2 = Trusted Sites zone
3 = Internet zone
4 = Restricted Sites zone

As we want to add the site to the Intranet Zone we enter a value of 1.


Upon the next Group Policy refresh, all workstations will now no longer get prompted when attempting to access the Intranet page.

Hope this blog post has been helpful for people experiencing the same problem.

62 comments:

  1. Is there a way that I can add sites and still leave end user the ability to add their own sites. When I tried this it locked the settings down for the end users.

    ReplyDelete
    Replies
    1. http://www.grouppolicy.biz/2012/07/how-to-configuring-ie-site-zone-mapping-using-group-policy-without-locking-out-the-user/

      Delete
  2. thank you for this advice
    it worked!

    ReplyDelete
  3. thank you, too.
    Same problem and the solution works for me!

    ReplyDelete
  4. Andrew you would need to create a script to add the sites to ensure policy does not take over end user control.

    ReplyDelete
  5. You can add the extries a registry entries in a GPO.
    - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\Domains\security_mmc.exe; Intranet=1, Internet=2
    - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ESCDomains\security_mmc.exe; Intranet=1, Internet=2

    ReplyDelete
  6. Thanks. It worked.

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  7. Is this different for IE11? I cannot get it to work

    ReplyDelete
  8. I had the same problem, and when I turned the firewall off the problem was solved, turning it off shouldn't be the solution and yet it's a temporary solution until we know how to configure it.

    ReplyDelete
  9. it is nice blog. It has provided me all the information which are required to correct the intranet . Thanks for sharing the valuable knowledge.

    ReplyDelete
  10. I'm assuming this will fix one of our user's access troubles. She has IE 10, and it works fine for everyone on IE 9 and IE 11 (as far as I know). We may roll out the specific site through group policy. Thanks for the idea!

    ReplyDelete
    Replies
    1. It did fix her problem! (P.S. It would be nice if this article would be updated for IE 11 and whether it applies.)

      Delete
  11. I rolled this out as a group policy domain-wide, but one user is still being prompted for credentials in IE and is getting flat out denied in Chrome. This is just one user. His internet settings do show that they are maintained by the group policy and the site is located in the intranet zone. Strange how it works for everybody but him.

    ReplyDelete
    Replies
    1. For Chrome, you may try editing the registry under HKEY_LOCAL_MACHINE | SOFTWARE | Policies. Under Policies, create a key called Google and then a key under Google called Chrome and then a string for Chrome called AuthNegotiateDelegateWhitelist. So the full item will be HKEY_LOCAL_MACHINE | SOFTWARE | Policies | Google | Chrome with a REG_SZ (string) object under Chrome. Set the value of the string to your site. Note: some users report this makes Chrome unstable, so only try this as a last resort.

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  12. Thank you very much for this. I would like to add that in my case, sites that had been added in the old Internet Explorer Maintenance settings needed to be removed for this to take effect.

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