It’s been some time ago since I last used Scapy, so I was curious as to how it would be to come back to. BTW – do use Wireshark to debug Python/Scapy. If you already have Wireshark installed you are good. In order to do the low-level stuff, Scapy needs a library like tcpdump or pcap. In windows you run a cmd-window “as administrator”. Please note that any Scapy script that sends packages – interactive or not – require administrator-privileges. In the same way you can fire up a Scapy-aware interpreter and work directly with the layers described above – and many others. You may know that you can toy around with Python in an interactive interpreter. If you already know Python, you can focus on learning Scapy. Installing and running on Windows and Linux Here’s a central part of a DHCP-DISCOVER: dhcp_discover = ( The whole thing is administrated in Python. Combining the layers with”/”, the packet is easily generated, and you may ask Scapy to send and wait for an answer. a DHCP message you may set something in the DHCP options, something in the BOOTP part, something in UDP, IP and maybe even in the Ethernet layer. In these variables you only set what you want to differ from the default. The scapy concept is very easy to understand: You design a packet by creating a variable for each layer that you need. (For more Python programs – see Downloads Third Edition) The Scapy concept all lengths that a packet may have – including too short/long. It is very beneficial to run a for-loop with e.g.

This is a Python module that allows you to generate all sorts of legal and illegal packets. In my IoT book I have described how I have had great benefit in using “Scapy”. In IoT, networks are always “connected” – or at least they can be.

Installing scapy mac