(Through ntop, all data in and out of the network are basically invisible. Whether it is used to monitor the network or to make network condition reports, ntop is a very excellent tool. However, due to the nature of the "sniffer" of the ntop network, it is determined that it is a "double-edged sword". How to protect this information and only provide it to authorized persons is a noteworthy problem. This data contains the following annexes:)