iftop

• iftop

$ sudo iftop

• Right hand side: average traffic in the last 2, 10, 40 seconds
• h - to get help
• p - to show ports
• n - toggle DNS host resolution
• L - liner/logarithmic scale
• s - show/hide source IP
• S - show/hide source port
• d - show/hide destination IP
• D - show/hide destination port