Under normal circumstances you will not be able to access any site in the development environment from a remote location.  This is normal.  The development environment is intended to be hidden from the "outside" world and Google.

You can access your dev site remotely, though, by using a service called VPN.  To learn more about this service, which is provided by OSU's Network Services, please see the VPN (off-campus access) article in OSU Helpdocs.