LookingGlass 在维基百科上的解释为“Looking Glass servers are computers on the Internet running one of a variety of publicly available Looking Glass software implementations. A Looking Glass server (or lg server) is accessed remotely for the purpose of viewing routing information. Essentially, the server acts as a limited, read-only portal to routers of whatever organization is running the lg server. Typically, publicly accessible looking glass servers are run by Internet service providers (ISPs) or Internet Exchange Points (IXPs).” - http://en.wikipedia.org/wiki/Looking_Glass_servers