Cant find the QBox host ip address

The TODO says " Copy the IP address from the output from the ifconfig command on the QBox host and store it in a new file internal_ip_address_of_server in the analyzing_protocol directory."

On pinging the inet ip, it says “Destination host unreachable.”.

I am stuck here for over 2 hours. applied tcpdump, netstat and many more. still cant find the actual solution.

There are two set of IP addresses internal and external. You have to understand what are those addresses, why they are created. By understanding that you will be able to execute this instruction.

I tried to print the NAT table. iptables not working.

You will only be able to ping a the public IP of your device from a non-local network.
I think you are trying to ping to the local IP.