iftop config

~/.iftoprc

interface: eth0 # The interface to monitor
log-scale: no # Use a logarithmic scale for bar graphs.
max-bandwidth: 2M # Fixes the maximum for the bar graph scale to bw, e.g. "10M". In bits
dns-resolution: yes # Controls reverse lookup of IP addresses.
port-display: on # Controls display of port numbers.
port-resolution: yes # Controls conversion of port numbers to service names.