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The basic idea behind the recipe we will see in this tutorial, is that we keep sniffing packets, once an HTTP request is captured, we extract some information from the packet and print them out, easy enough? let's get started.
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SCAPY HTTP SNIFFER INSTALL
If you have problems installing Scapy, check these tutorials: Let's install the requirements for this tutorial: pip3 install scapy colorama In Scapy 2.4.3+, HTTP packets are supported by default. Sniff(filter="port 80", prn=process_packet, iface=iface, store=False) Sniff 80 port packets with `iface`, if None (default), then the Let's define the function that handles sniffing: def sniff_packets(iface=None): Let's import the necessary modules: from scapy.all import *įrom import HTTPRequest # import HTTP packet We need colorama here just for changing text color in the terminal. This function is executed whenever a packet is sniffed We passed the process_packet() function to sniff() function as the callback that is called whenever a packet is sniffed, it takes packet as an argument, let's implement it: def process_packet(packet): Sniff(filter="port 80", prn=process_packet, store=False)Īs you may notice, we specified port 80 here, that is because HTTP's standard port is 80, so we're already filtering out packets that we don't need. We are extracting the requested URL, the requester's IP, and the request method here, but don't be limited to that, try to print the whole HTTP request packet using packet.show() method, you'll see a tremendous amount of information you can extract there.ĭon't worry about the show_raw variable, it is just a global flag that indicates whether we print POST raw data, such as passwords, search queries, etc. Parser.add_argument("-i", "-iface", help="Interface to use, default is scapy's default interface") + "It is suggested that you run arp spoof before you use this script, otherwise it'll sniff your personal packets") Parser = argparse.ArgumentParser(description="HTTP Packet Sniffer, this is useful when you're a man in the middle." \ Now let's implement the main code: if _name_ = "_main_": We're going to pass it in the script's arguments.
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SCAPY HTTP SNIFFER WINDOWS
Here is the output after browsing HTTP websites in my local machine: We've used the argparsemodule to parse arguments from the command line or terminal, let's run the script now (I've named it http_filter.py): :~/pythonscripts# python3 http_sniffer.py -i wlan0 -show-raw Parser.add_argument("-show-raw", dest="show_raw", action="store_true", help="Whether to print POST raw data, such as passwords, search queries, etc.") Python scapy install windows cmd keygen# You may wonder now what is the benefit of sniffing HTTP packets on my local computer. Well, you can sniff packets all over the network or a specific host when you are a man-in-the-middle. To do that, you need to arp spoof the target using this script, here is how you use it:Īt this moment, we are spoofing "192.168.1.100" saying that we are the router, so any packet that goes to or come out of that target machine will flow to us first, then to the router.