This command uses tcpdump to create a simple ICMP listener to test whether incoming ping (ICMP echo request) traffic is reaching my attacking machine. It’s useful for basic network connectivity testing and for verifying whether firewalls or routing configurations are blocking ICMP traffic.
Command Reference:
Interface: tun0
Filter: icmp and icmp[icmptype]=icmp-echo
sudo tcpdump -i tun0 icmp and icmp[icmptype]=icmp-echo