Single Sign On with 3 applications

Posted by John H. on Stack Overflow See other posts from Stack Overflow or by John H.
Published on 2010-05-17T20:12:27Z Indexed on 2010/05/18 18:20 UTC
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Filed under:

c#

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.NET

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vb.net

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security

I'm building three web applications in .NET that will all share a users database and login information. Lets pretend that application 1 is the "parent" application and applications "A" and "B" are the "child" applications. All users have to be logged into application 1 to have access to applications A and B.

Authorization, Authentication, and MachineKey sections of all web configs are present and work correctly.

I have the correct web.config settings in all applications to achieve Single Sign On except one problem remains: what do I put in the "loginUrl" attribute of the forms tag in Applications A and B.

Assume that the url for the login to application 1 is "www.johnsapp.com/login.aspx" How can I get applications A and B to send the user back to application 1 for authentication using only settings in web.config?

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