The Handle System is not an end user system, and it is not off-the-shelf software. It's an underlying infrastructure for identifying resources whose location and other basic information, e.g., ownership, needs to be updated from time to time. Handle servers should be installed by system administrators. It is very much like installing a Web server. The server should be installed on a machine with an Internet presence, which should be outside an organization's firewall. If it must be inside a firewall, then ports 2641 and 8000 need to be open to incoming and outgoing messages.