(Sniffit is a network monitoring software developed by LawrenceBerkeleyLaboratory, which can run in various ways such as Linux, Solaris, SGI, etc. It is mainly used for the insecurity of the TCP/IP protocol to monitor the machines running the protocol. Of course, packets must be monitored by the machine running sniffit, so it can only monitor machines on the same network segment. And it is also free to add certain plugins to it for additional functionality.)