I'm planning a web application that will have its own server behind the corporate firewall. There will be two sets of users, internal and external to the organisation. Internal users will be located inside of the firewall as same as the application server and the external users are outside over the internet. All users will be authenticated via a login by the web application.

I would like a setup where the external users will be required to access whole of the application using SSL and the internal users via standard http connection.

I would like to know, if it is possible to setup a single instance the application so that it can be accessed via SSL for external (over the internet) users AND over http for internal users?

Thanks