FIM firewall ports

Hi,

Please could someone clarify what ports are required (and how FIM components talk to one another) in the following scenario:

- SSPR Registration & Reset Portal in DMZ (machine 1)

- FIM Service (machine 2)

- FIM Sync (machine 3)

1. When doing a password Registration, how does SSPR Portal connect to the FIM Service?

2. When doing a password Reset, how does SSPR Portal connect to FIM Service? Then how does FIM Service connect to FIM Sync? then how does FIM Sync connect to AD to reset the password?

Thanks you,

DW