Dd-wrt network monitor
In this example the device we want to monitor has an IP address of 192.168.1.77 and the listening/monitoring device has an IP address of 192.168.1.97. Also the firewall, in this case DD-WRT, is running on 192.168.1.1. Now SSH to the router running DD-WRT firmware as root so you can enter the below commands from the CLI.