#!/bin/sh #Perform a tcpdump capture where you only capture DNS packets. sudo tcpdump -c 10 -ttt 'tcp port 53 or udp port 53' #Perform a tcpdump capture where you capture TCP packets that are destined for either port 443 or 8080, and originate from your computer. #Perform a tcpdump capture where traffic is either UDP or TCP, is inbound to your computer, and destined for a port between 20000 and 35000.