Hardware Reference
In-Depth Information
Summary
We started this chapter by focusing on the general airspace surrounding the
Wi-Fi network in our home. Using the Kismet application, we learned how to
obtain information about the access point itself and any associated Wi-Fi adapters,
as well as how to protect your network from sneaky rouge access points.
Shifting the focus to the insides of our network, we used the Nmap software to
quickly map out all the running computers on our network and we also looked at
the more advanced features of Nmap that can be used to produce a detailed HTML
report about each connected machine.
We then moved on to the fascinating topics of network sniffing, ARP poisoning, and
man-in-the-middle attacks with the frightfully effective Ettercap application. We saw
how to use Ettercap to spy on network traffic and web browsers, how to manipulate
HTML code in transit to display unexpected images, and how to drop packets to
keep your network guests from hogging all the juicy bandwidth.
Thankfully there are ways to protect oneself from Ettercap's mischief, and we
discussed how encryption completely changes the game when it comes to network
sniffing. We also looked at static ARP entries as a viable protection against ARP
poisoning attacks.
You got an introduction to network traffic analysis using Wireshark, where you
learned about the standard pcap log format and how to open up packet dumps from
Ettercap and Kismet over the network through SSH.
Then we took a look at dynamic DNS, port forwarding, and SSH tunneling,
which help us locate and connect to our Pi over the Internet and even tunnel
traffic through it.
We concluded the chapter with some refreshing Profanity, a versatile instant
messaging client that allows you to send encrypted messages to your friends
or to keep them occupied with a chat bot while you pop out for a quick errand.
In the upcoming final chapter, we're sending the Pi outside the house while staying
in touch and receiving GPS and Twitter updates.
 
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