In a site.com page I have an iframe and I want to access the vf page in this iframe. when I use the internel link of this vf page(https://cs2.salesforce.com/apex/page) as an iframe using site studio page (for testing purpose)and stay login to the org where this vf page is existing at that time it is working fine.
The exposed url(http://sample.force.com/calendar/apex/page) for that vf page is working in browser .
So now when I want to use this vf page as an iframe of a site.com studio page I am just using this exposed url in iframe but it is showing the blank iframe.
Not sure of how to implement this.
Thanks in advance