Wireshark Crash Course

Learn hands on network analysis start to your journey towards a career in network engineering and cyber security
  • Lectures 25
  • Video 3 Hours
  • Skill level beginner level
  • Languages English
  • Includes Lifetime access
    30 day money back guarantee!
    Available on iOS and Android
    Certificate of Completion

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Course Description

Wireshark is the most widely used network capture and protocol analyzer on the market. It is used by IT and Network administrators to troubleshoot network connectivity issues and by Network Security analysts to dissect network attacks. This free and open source application is so widely used in the industry because it works. It is cross platform, meaning that it runs on Windows, Mac, Linux and FreeBSD.

This course is an introduction to the application and goes over the basics to get you started capturing and analyzing network traffic. It will build your base by explaining the theory behind how networks work and then get you in to real world applications of the software.

In this course you will learn:

  • The basics of how networks operate
  • How to capture traffic on wireshark
  • How to use display and capture filters
  • How to use command line wireshark to work with large packet captures

What are the requirements?

  • Computer with Network Card
  • Basic Understanding of Networking

What am I going to get from this course?

  • Over 25 lectures and 2 hours of content!
  • Understand how Networks Operate
  • Capture Network Traffic in Wireshark
  • Filter Captured Traffic in Wireshark

What is the target audience?

  • Network Administrators
  • System Administrators
  • IT Security Analysts

Curriculum

Section 1: Introduction
01:14

Course Promo

02:15

Introduction to the course material and the instructor

04:33

This lecture covers what wireshark is, it's history, what its used for and the graphical interface.

05:45

In this lecture we discuss the Open Systems Interconnect (OSI) Model and how it relates to wireshark.

Quiz
4 questions
Section 2: Installing Wireshark
03:47

This lecture sets up the nuances of installing Wireshark on multiple platforms. We will dive in to installing on Windows 7 and also the need for WinPCAP.

02:45

This video goes over installing the X11 client XQuartz and installing Wireshark so that it works properly with XQuartz.

02:33

Instructions on how to install and run wireshark on Ubuntu 12.04

Commands Used:

 01:25 - sudo apt-get install wireshark
 02:22 - wireshark 
Section 3: Capturing Network Traffic
09:15

This lecture will discuss the theroy behind placing wireshark in the proper location on a network for maximum packet capture.

06:30

Here we will set up your first network capture. We will discuss many of the options related to packet captures.

07:13

Capture filters are great for capturing a small subset of traffic on a very congested network. This lecture will explain how to build capture filters and how to apply them in wireshark. See some of the supplemental resources for more detialed information on all the filters available.

Section 4: Analyzing Network Traffic
09:04

Once you have captured traffic from the network, wireshark has a whole host of tools that allow you to manipulate the data. This lecture will show you some of the common tools such as time shifting, changing column preferences and merging PCAP files.

11:27

Display filters allow you to display only the packets you want to see or to filter out packets that you don't want to see. In this lecture we will discuss several ways to build display filters and how to save them for future use.

Sample Display Filters
Text
04:25

In your captured data there may be several computers all talking at once. Wireshark has the ability to rebuild these "conversations" and show you the plain text data. This lecture will show you how to rebuild the conversations and see what conversations happened on the network.

04:22

One of the main functions of networks is to transfer files between two end points. While the wireshark interface shows you the individual packets it may be difficult to see what was actually transmitted. Wireshark has several tools that will rebuild files that were transmitted over HTTP and SMB. This lecture will show you two ways of rebuilding files from a PCAP.

04:20

Tshark is a command line version of wireshark that comes bundled with the application. It is very handy for scripting and carving smaller pcap files out of larger pcap files. This lecture will demonstrate the power of this program.

Commands Used:

 01:13 - tshark --help
 02:30 - ls -lah 
 03:11 - tshark -r large.cap -R http -w small.pcap 
 03:32 - ls -lah 
Section 5: Conclusion
Additional Resources
Text
01:28

Thank you so much for taking my course. If you would like to keep up with me you can signup for my newsletter and I will send you updates to the course and sneak peaks/discounts on future courses. Signup here.

Section 6: BONUS - Student Questions
08:26

In this lecture we will go over some advanced tshark uses. Discussing field extraction using tshark and organizing the output.

Commands Used:

 02:53 - “tshark -r http.pcap -T fields -e http.request.method” 
 03:56 -“tshark -r http.pcap -T fields -e http.request.method | sort | uniq -c” 
 05:30 - “tshark -r http.pcap -T fields -e http.request.uri” 
 07:21 - “tshark -r http.pcap -R “http.request.method == “GET”” -T fields -e ip.dst” 
 07:44 - “tshark -r http.pcap -R “http.request.method == “GET”” -T fields -e ip.dst | sort | uniq-c” 
07:36

In this lecture I discuss using wireshark and Virus Total to discover if any computers on your network are communicating with known bad IP addresses.

Section 7: BONUS - TCPDUMP
03:19

An introduction to TCPDUMP and how it is different from wireshark.

08:05

Start your first capture using TCPDUMP and learn the common command line switches.

Commands Run:

 00:30 - man tcpdump 
 03:48 - tcpdump -D 
 04:26 - tcpdump -i en0 
 05:05 - tcpdump -i en0 -n 
 05:37 - tcpdump -i en0 -n -vvv 
 06:16 - tcpdump -i en0 -n -vvv -w test.pcap 
 07:16 - tcpdump -i en0 -n -vvv -s 96 -w test.pcap 
04:53

Create filters for TCPDUMP using the Berkley Packet Filter (BPF) syntax.

Commands Run:

 02:50 - tcpdump -i en0 -n -vvv host 10.0.1.21 
 03:14 - tcpdump -i en0 -n -vvv host 10.0.1.21 and port 80 
 04:17 - tcpdump -i en0 -n -vvv net 10.0.1.0/24 and port 80 
03:34

Use TCPDUMP to carve smaller pcap files out of much larger datasets.

Commands Run:

 00:28 - ls -lah 
 01:13 - tcpdump -r sansholidayhack2013.pcap tcp and port 80 
 01:37 - tcpdump -r sansholidayhack2013.pcap -w http.pcap tcp and port 80 
 01:41 - ls -lah 
 02:23 - tcpdump -r sansholidayhack2013.pcap -w badip.pcap host 208.80.154.225 
 02:26 - ls -lah 
3 pages

Cheat sheet for TCPDUMP commonly used commands and filters.

TCPDUMP Quiz
4 questions

Instructor Biography

Kyle Slosek , IT Security Ninja, CISSP, C|EH, GCIH

Kyle Slosek is a security practitioner with several years of experience in enterprise IT environments. Kyle works for a large IT firm in the DMV area and had done everything from certification and accreditation to pentesting testing and forensics. He holds a BS in Information Technology and an MS in Information Assurance as well as several industry certifications.

I got in to computers at a young age. When I was young I was fascinated with the family computer and proceeded to build my own with used parts I found lying around or purchased on eBay. I was first interested in security after a home server I had built was hacked. I was hosting my own website on a old desktop I had lying around when I realized that a hacker had defaced my site. I then began my long security career.

I am very passionate about STEM education and regularly spend time in high schools talking to students about IT and IT Security. I sit on the board of advisors for the Montgomery County MD Academy of Information Technology and in that role help place high school students in well paying and interesting internships.

Reviews

Average Rating
4.8
Details
  1. 5 Stars
    25
  2. 4 Stars
    1
  3. 3 Stars
    0
  4. 2 Stars
    0
  5. 1 Stars
    1
    • Reotee Shanker

    TCPDUMP

    Excellent course. I learned a whole lot more quickly from your course than i could from a book. Your style of teaching is wonderful. You should think of creating a course in Networking troubleshooting with Wire shark and TCPDUMP. Very good course form Network Administrators

    • Brian Murray

    WireShark Crash Course Review

    Great crash course filled with examples, screen shots and walk-through videos. Lots of good practical information and conscientious tips as well.

    • Eric Marnell

    Excellent Wireshark course

    Found this very helpful in diving into Wireshark. Will use as a reference, launching point for additional training with it. Nice job Kyle!

    • Robert Czymoch

    Very nice intro to Wireshark

    This course goes over all the relevant basics of Wireshark. So by the time you are finished you could start using Wireshark and then increase your learning from that point.

    • Harv Samra

    Very worthwhile course.

    This is a great course to learn about Wireshark. Instructor was very concise.

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