Trying to figure out a way to redirect the https://naX.salesforce.com/secur/login_portal.jsp page to a Custom VF login page.
Here is my use case:
My org is creating a new Customer Portal with custom VF pages replacing all the Standard SalesForce pages for each tab. We will be transitioning all portal users to new Portal shortly. For users that have bookmarked the Current standard salesforce login page we want to redirect to our new VF login page.