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Editorial Team
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Asked: 2026-06-18T00:30:04+00:00

I have a question that I cant seem to get a straight answer to

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I have a question that I cant seem to get a straight answer to anywhere on the web.

Can DotNetOpenAuth be used to handle single sign on for multiple subdomains, never mind what app or platform, can i have a provider service that after the user has first signed in on one of the sub domains, he wont have to sign in again.

I dont care about facebook/twitter integration etc. which it appears to me that DotNetOpenAuth seems to mainly be used for??

Also, does anyone have a sample implementation of such a provider?

Thanks
Neil

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1 Answer

  1. Editorial Team

    When you say sub domains, do you mean the third level domain name (the ‘www’ part)? If so, you can do that entirely without any special library or protocol. Just set your user session cookies to apply to the second level domain name and all sub domains will automatically have visibility into it.

    Across second level domain names requires a protocol, and yes, DotNetOpenAuth can help here. If you download the .zip from sourceforge the samples include two SSO samples that may help you there.

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