For the technically minded, the IP spoofing attack in this case relied on an older technology known as the R-services, which required configuring each computer system so that it would accept trusted connections, meaning that a user could log in to an account—depending on the configuration—without needing to provide the password. This made it possible for a system admin to configure a server to trust other computers for the purpose of authentication. One example is where a system admin manages multiple machines, so when he or she is logged in as root, no password would be required to log in to other systems that trust the server.