Ports used by Configuration Manager 2007
Firewall Ports
http://technet.microsoft.com/en-us/library/bb632618.aspx
If you are going to run SCCM on the internet you will also need this.
Prerequisites for Internet-Based Client Management
http://technet.microsoft.com/en-us/library/bb633122.aspx
Does your head hurt yet? i know mine does.