Summary: Just a little POC of catching a live packet in order to read bytes / mangle / alter packet payload.

In order to catch the packet inside the python code you'll have to redirect an incoming/outgoing/forwarded packet to the nfqueue.

    Example:
        iptables -A INPUT -j NFQUEUE --queue-num 1

If you have trouble installing "Netfilterqueue" please take a look over here: https://stackoverflow.com/questions/61301351/how-do-i-install-netfilterqueue-for-python3