I am implementing SSO, the documents which are avaliable via Salesforce.com are hard to understand. Does anybody know an easy to understand document or blog where I can study and implement it. Thanks in adavance
Refer the above article and thats the one of the best articles i have read on this .
You will first need to raise a case with salesforce to enable delegated authentication for your org.
Not sure if you referred the above link to configure this .
Its a very simple process where once salesforce enables the delegated authentication for your org you will follow the below steps
1)In Salesforce, download the Web Services Description Language (WSDL) file AuthenticationService.wsdl from Setup by clicking Develop | API | Download Delegated Authentication WSDL
2)Add a link to your corporate intranet or other internally-accessible site that takes the authenticated user’s credentials and passes them through an HTTP POST to the Salesforce login page. Because Salesforce does not use the password field other than to pass it back to you, you do not need to send a password in this field.
3)In Salesforce, specify your organization’s single sign-on gateway URL from Setup by clicking Security Controls | Single Sign-On Settings | Edit. Enter the URL in the Delegated Gateway URL text box.
4)For security reasons, Salesforce restricts the outbound ports you may specify to one of the following: 80: This port only accepts HTTP connections. 443: This port only accepts HTTPS connections. 1024–66535 (inclusive): These ports accept HTTP or HTTPS connections.
Read the above document to understand the flow