net-mgmt/tcptrack 1.4.2_4 DragonFly

tcptrack is a sniffer that displays information about TCP connections it sees on a network interface. It passively watches for connections on the network interface, keeps track of their state, and displays a list of connections in a manner similar to the UNIX top(1) command. It displays source and destination addresses, ports, connection state, idle time, and bandwidth usage.