By default, the FileVault 2 Login Screen comes up before the OS boots, preventing you from accessing it remotely via SSL or Screen Sharing.
Apple provides a utility that, when executed, will save your username and password in the system memory and use it one time (then clear it) to proceed past the FileVault 2 Login Screen.
Open Terminal and execute the following command. Be careful though, as it will cause an immediate reboot of the system (as though you used the
sudo fdesetup authrestart
After the reboot, your hard drive will be unlocked and you will be presented with the standard MacOS Login Screen (as though you do not have FileVault 2 enabled).
Not every Mac supports this command though. To find out if yours does, you can execute this command:
If the response is "true", then you're ready to reboot.