I am using GNU/Linux (Debian 6, x86_64), X11, but no heavyweight desktop environment (I used xmonad).
I would like to monitor the activity of a specific network interface. I would like to know how many packets were sent and recevied, TCP/UDP and Ports. Is there a lightweight tool that does such monitoring?
TL;DR: I need a wireshark-alike which displays basic packet information for a specific NIC.