Book Image

Mastering Wireshark 2

By : Andrew Crouthamel
Book Image

Mastering Wireshark 2

By: Andrew Crouthamel

Overview of this book

Wireshark, a combination of a Linux distro (Kali) and an open source security framework (Metasploit), is a popular and powerful tool. Wireshark is mainly used to analyze the bits and bytes that flow through a network. It efficiently deals with the second to the seventh layer of network protocols, and the analysis made is presented in a form that can be easily read by people. Mastering Wireshark 2 helps you gain expertise in securing your network. We start with installing and setting up Wireshark2.0, and then explore its interface in order to understand all of its functionalities. As you progress through the chapters, you will discover different ways to create, use, capture, and display filters. By halfway through the book, you will have mastered Wireshark features, analyzed different layers of the network protocol, and searched for anomalies. You’ll learn about plugins and APIs in depth. Finally, the book focuses on pocket analysis for security tasks, command-line utilities, and tools that manage trace files. By the end of the book, you'll have learned how to use Wireshark for network security analysis and configured it for troubleshooting purposes.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Free Chapter
Installing Wireshark 2

FTP analysis

In this section, we'll take a look at how FTP works, the differences between the active mode and the passive mode, and how to transfer files securely with FPTS and SFTP.

We'll start a capture once again and connect to an FTP server that does not use encryption. So, this server is a Belarus-hosted server that has some Linux ISOs on it, and it allows anonymous connections. I'll just log in with anonymous, and we'll use port 21 and click on Quickconnect:

We can see that we've logged in. It states that it does not use TLS, and it lists the root directory:

What we'll do is stop that capture, and if we scroll down through the packets we'll see that we have a bunch of other types of traffic here, but then we see some FTP listed. What we can do is create a filter with simply ftp in it, and that'll show us all the FTP traffic:

We can see the connection over unencrypted FTP. You can see all the commands, just like with HTTP. If we dig into our FTP section in the packet details, we'll see...