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Understnading the basics of Single Sign on via FormsAuthentication

I need to manually do SSO via FormsAuthentication (on ASP.NET 2.0) but i'm struggling on the basics, i'm sure this is a very easy question but going to ask it anyway...

I'm using Single sign on and Formauthenticion, however for the life of me i can get this to work, all i need to do is have one local application Authenticating another local application - but unfourtunitly they both use different ports and as such i'm told this equates to different domains, so with this in mind i'm finding it very difficult to produce a proof of concept of this.

I've found this amazing article http://blogs.neudesic.com/blogs/michael_morozov/archive/2006/03/17/72.aspx 

But still can't get any of these to work, does anyone know of any sample code that demos this process using local webistes? e.g.


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Are you using the Visual Studio "internal" webserver?
It works well enough  to test/debug apps...but for a proof of concept demo of something like this, I would suggest setting up real IIS virtual directories...or something that is closer to the production environment.

The VS "server" is just not a real web server and most likely why you can't get the samples from that article to run.
paulCardiffAuthor Commented:
I agree that is a possibility but the problem i'm mid way through writing these and there turning into some pritty big pages - so ideally i'd like to be able to debug these via the Visual Studio "internal" webserver - is this possible?
I just haven't ever seen enough in-depth documentation on the inner workings of the VS internal server.
I do know the internal server is built upon the Cassini project which is an application to serve ASP.Net pages written completely in c#.
And as such, it isn't a "web server" project and was never intended to be, it was written as "a way to serve ASP.Net web pages without a web server" and as it isn't a real web server, I wouldn't trust it to behave like IIS or a real web server environment.
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