jnettop - a network connection analyzer

Jnettop is a small network traffic analyzer (http, ssh, dns). Monitor bandwidth usage, filter connections, and find the host using the most bandwidth!

jnettop linux

jnettop -i network_interface

jnettop - a small application showing network traffic on specific interfaces.

startssl nginx
It shows types of connections (http, dns, ftp, ssh), and has the ability to predefine filtering rules and easily switch between them while the program is running. It shows current bandwidth usage both in total and individually.
The ability to sort by ports or hosts helps locate the connection that's using the most bandwidth