HTTPS auth pages without akamai


We are connecting through a restricted proxy where we have to whitelist by ip address any https requests. When we tried to load twitter oauth https page, it doesn’t render properly due to js/css being on
Is there a way to not use the akamai service? What about getting a list of ip ranges for it?
If this is not possible, would we have to login via xauth?

Any help would be appreciated.