I have VF page, which have been added to Force.com Site to make it accessible to the external user.
Now my problem is that theuser is able to access my VF page without authentication. Salesforce is not asking any authentication.
I have tried by removing my page access following below mentioned steps but external user is not able to access VF page. User is getting insufficient privilege error message.
Go to Setup -> Communities -> All Communities -> click Manage -> Administration -> Pages -> Go to force.com -> Click on public access settings.
Please advise me how to access Salesforce site VF page with authentication?