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Why does IIS Give clients 403 Forbidden Errors?

Posted on 2011-09-26
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Last Modified: 2012-05-12
Points of My Scenario
1. I am admin of a IIS7 web server on Windows Server 2008 R2.
2. Clients connect to the server's website using HTTPS
3. When the website is configured to "Require SSL" and to accept client certificates, clients (browsers) get a HTTP 403 Forbidden error when connecting by HTTPS.
4. When the "Require SSL" setting is removed from the website, clients can successfully connect, although using HTTPS again.
QUESTION: If clients are using HTTPS in both cases, why do they fail when the website is configured to "Require SSL"?
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Question by:waltforbes
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Expert Comment

by:Hendrik Wiese
ID: 36599087
have you created the SSL Certificate in IIS7?
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Expert Comment

by:Hendrik Wiese
ID: 36599101
You can click here for full instruction on how to setup SSL on IIS7.
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Author Comment

by:waltforbes
ID: 36599179
To HendrikWiese: I have acquired a certificate from our CA (certificate authority) and binded it to the website successfully: note that clients can access the website by HTTPS successfully. The problem arises only when the website is configured to require SSL. I have verified the instructions you sent in the link (http://learn.iis.net/page.aspx/144/how-to-set-up-ssl-on-iis-7/).
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Expert Comment

by:Hendrik Wiese
ID: 36599217
Please have a look at the following and let me know if it helps?

http://www.experts-exchange.com/Networking/Protocols/Application_Protocols/SSL/Q_26561310.html
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Expert Comment

by:Hendrik Wiese
ID: 36599302
Have you tried the following:

To resolve this problem, follow these steps:1.In Windows Explorer, locate the folder of the virtual directory, or locate the folder of the Web site.
2.Right-click the folder, and then click Properties.
3.Click the Security tab, and then click Edit.
4.In the Group or user names box, click the account to which you want to grant the Write permission, and then click to select the Write check box.
5.Click OK.

Reference: http://support.microsoft.com/kb/942035
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Accepted Solution

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Hendrik Wiese earned 500 total points
ID: 36599317
This is obviously a permission issue.

You can view all the forbidden codes here and select the KB within the code description to see the resolution.
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Author Closing Comment

by:waltforbes
ID: 36599391
HendrikWiese: the codes are what I needed most. Many thanks!
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