http://developers.de/blogs/damir_dobric/archive/2009/04/14/configuring-wcf-with-membership-provider.aspxCreate Certificate Firs of all you have to create a certificate, because credentials have to protected. This example shows how to create selfsigned certificate: Create in local machine if you want to host a service under system account: makecert.exe enCommunityServer 2008 SP1 (Build: 30619.63)http://developers.de/blogs/damir_dobric/archive/2009/04/14/configuring-wcf-with-membership-provider.aspx#5983Wed, 17 Jun 2009 06:09:06 GMT7e491611-45ad-4dae-a68f-c4cb64439510:5983Peter<p>What happens when you pass an invalid user name and password. WCF takes ages to come back..... is there a way for WCF to return straight away, it&#39;s only checking against the asp.net provider anyway.</p> <div style="clear:both;"></div><img src="http://developers.de/aggbug.aspx?PostID=5983" width="1" height="1">http://developers.de/blogs/damir_dobric/archive/2009/04/14/configuring-wcf-with-membership-provider.aspx#5337Tue, 12 May 2009 11:43:54 GMT7e491611-45ad-4dae-a68f-c4cb64439510:5337Damir Dobric<p>Please note that if &quot;AspNetCompatibilityMode&quot; is enabled Service Model will properly authenticate by using of MembershipProvider, but it will NOT use RoleProvider anymore.</p> <p>The result of this behavior is that CurrentProncipal.Identity has a valid user authenticated by membership provider, but the user will not have any role.</p> <p>In other words, it doesn&#39;t work.</p> <div style="clear:both;"></div><img src="http://developers.de/aggbug.aspx?PostID=5337" width="1" height="1">