The Dell Remote Access Card (DRAC) is a fantastic tool for getting remove keyboard, video, and mouse (KVM) over the network. You can do many of the normal administrative tasks such as powering on and off the system, loading media via a virtual floppy or cdrom, get system vitals, and more. This bit of technology sits directly on the motherboard and has an ethernet port, which can position on your private network. If you wish to lock down his network even further via specific port access. You will need to make sure the following ports are open:
3668 (virtual media port)
3669 (virtual media ssl port)
5900 (keyboard, mouse)
This should ensure the functionality on the DRAC works properly.