You do not have permission to view this directory or page using the credentials that you supplied.You do not have permission to view this directory or page using the credentials that you supplied.

Question

Hi,
I update recently my OS to Yosemite and decided to use Safari again as my web browser (I was using Chrome). Some of the sites I need to access for professional reasons are not available with safari. I receive the message: "403 - Forbidden: Access is denied.You do not have permission to view this directory or page using the credentials that you supplied.". I believe there is a pattern here, they are all sites publish with IIS with SSL and build with ASP.NET.
I can access them with Chrome (on OS X) or with Internet Explorer (with my Windows VMs).
I've already cleared all saved passwords, cookies, history, etc...the problem remains. I'm sure this is a known problem, but all the answers I've found on the internet were for things like DNS and unavailability of the site. The sites are working fine and I can access them with Chrome.
Can anybody help me? An explanation would also be nice :-) Something to do with Microsoft Authentication methods ?
Thanks,

Answer 1

Some websites require a special client certficate for access. If you don't have that certficate, you'll have to contact the site operator to find out how to get one.
Sometimes the problem is caused by a web server that is configured to request an optional client certificate. Safari treats the request as mandatory. In that case, other browsers such as Firefox and Chrome may be able to connect to the site, because they ignore the request.
The first time you were prompted for a certificate, you may have clicked through a dialog that requested access to the Apple certificate in your keychain that is used to secure the iMessage service. In that case, you may be able to regain access to the site in Safari by doing as follows.
Back up all data.
Double-click anywhere in the line below on this page to select it:
com.apple.idms.appleid.prd
Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the Keychain Access application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Keychain Access in the icon grid.
Paste into the search field in the Keychain Access window by clicking in it and pressing the key combination command-V. An item may appear in the list of keychain items. The Name will begin with string you searched for, and the Kind will be "certificate."
Delete the item by selecting it and pressing the delete key. It will be recreated automatically the next time you launch the Messages or FaceTime application.
The next time you visit a site that prompts for an optional client certificate, cancel out of the prompt. You may have to do this several times before the server stops asking.
Credit for this idea to Christian Braukmueller of SAP.