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security, electronics and my life
MITM 7: Sniffing with TCPDump
I’ve been thinking about whether develop a new application — and reinvent the wheel like for ARP poisoning with libnet and libpcap — or using tools already available. I finally decided to use TCPDump because this tool might be really handy in many situations. I think I will improve ARP Spoof SI anyway with a […]
Posted in: Tutorials
MITM 6: ARP spoofing (exploit – 2)
February 21, 2012
Today we are gonna reinvent the wheel, and the worst part is that we won’t even improve it. Why? Because I want to develop an ARP spoofer in C from the scratch based on what we’ve learnt so far in this tutorial. For this program, I used the multi-platform libraries libnet (for forging packets) and […]
Posted in: Tutorials
MITM 5: Forwarding packets
January 31, 2012
As mentioned in the previous post, after spoofing the ARP table of both victim and default gateway, you may block the internet connection of the victim because packets are sent to the attacker which doesn’t forward them to the default gateway: the attacker open the packet (data link layer) and read the destination IP address […]
Posted in: Tutorials
MITM 4: ARP spoofing (exploit)
January 31, 2012
Now I described how ARP works, let’s exploit the weakness: deceiving the victim and the default gateway by pretending to be both of them. There are many tools for the ARP spoofing such as Cain & Abel, Ettercap and DSniff (I will soon write a tutorial about Ettercap and Cain & Abel). In order to […]
Posted in: Tutorials
OSI model – Layer 4: Transport (TCP and UDP with Scapy)
January 30, 2012
I already wrote an article describing the OSI model and its 3 first layers (physical, data link and network). Now I’ll talk about the layer 4: transport. While the data link layer carries the point-to-point connections and the network layer carries the routing of packets, the transport provides end-to-end communication services for applications. The transport […]
Posted in: Tutorials
February 25, 2012
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