tcptrack is a packet sniffer which passively watches for connections on a specified network interface, tracking their states and listing them in a manner similar to the top command. It displays source and destination addresses and ports, connection state, idle time, and bandwidth usage. Screenshot available here.
You can download it from the following link: https://packetstormsecurity.com/files/download/34556/tcptrack-1.1.3.tar.gz
Source: https://packetstormsecurity.com/files/34556/tcptrack-1.1.3.tar.gz.html