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Scapy is a packet manipulation tool for computer networks written in Python. It runs natively on Linux (as well as Mac OS X), but the latest versions of scapy actually supports Windows out-of-the-box. So you can use nearly all of scapy's features on a Windows machine as well.
It mainly provides a Python interface into libpcap, which is a portable C/C++ library for network traffic capture.
Now you're maybe wondering, ok well, but why scapy specifically ?
Well, the fact is that it provides us with a lot more functionalities than any other tool or module. Here are some of its features:
It can literally replace most of any penetration tester's favorite utilities such as , hping, arpspoof and some parts of tshark and nmap.
You may say now that you don't really know these tools, well if you don't, no worries. The authors of scapy designed it to be much easier for beginners, as well as powerful tool for network analysts.
As mentioned in the official documentation, scapy enables you to build exactly the packets you actually want. You are free to put any value you want in any field you want of the packet you want and stack them like you want, the authors assume that you are an adult.
Alright, enough talking, now let's dive into the installation of this amazing module.
First you are going to need Python 2.7+/3.4+ installed, if you don't have Python yet, head to python official website.
If you are a linux user, you can run scapy without libpcap, you need to install tcpdump by the following commands:
On Debian and Ubuntu:
apt-get install tcpdump
On CentOS and Fedora:
yum install tcpdump
For Mac users, You may need to install libpcap first using the following commands:
brew install libpcap
In Windows, you gonna need to install npcap here .
When you finish installing these dependencies in various platforms, you can easily install scapy using the following command:
pip install scapy
There are two ways of running scapy, one is using the interactive shell and the second is to import it in python script.
The following lines will actually import all scapy modules, functions and variables, then we create and show an IP packet for testing purposes.
###[ IP ]### version = 4 ihl = None tos = 0x0 len = None id = 1 flags = frag = 0 ttl = 64 proto = 0 chksum = None src = 0.0.0.0 dst = 127.0.0.1 \options \
Congratulations, you have managed to install Scapy, here are some good tutorials:
Happy Coding & Crafting ♥
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