Just to add to Anthony's post, the CCDed application is how some of the functions of the Control Center communicate with the dedicated servers. Anyone that uses the Windows firewall, or any other software firewall, CCDed uses ports TCP/743 and TCP/52155. In order for the application to function correctly there must be exceptions for these ports in the firewall.
Joshua Donzello
Dedicated Support Team
CrystalTech Web Hosting, Inc.