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Course Outline

Introduction

  • Wireshark -- more than just a last-resort tool

Overview of Network Troubleshooting Concepts

  • Root cause analysis

Installing Wireshark

Overview of Wireshark Features

  • Navigating the user interface

Capturing Traffic in the Test Environment

  • Selecting the appropriate network interface
  • Capturing packets on both wired and wireless networks

Analyzing the Logs

  • Examining HTTP packets
  • Viewing bidirectional TCP streams
  • Saving logs for offline inspection

Analyzing Connection Speed Issues When Accessing a Specific Website

  • Utilizing filters
  • Reviewing statistics

Analyzing by Traffic Type

  • DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP, and HTTP/HTTPS
  • Identifying consistently slow connections over extended periods

Checking Response Times

  • Configuring delta time columns

Inspecting for Machines Infected with Malware

  • Examining ARP traffic

Inspecting Sources of Network Traffic

  • Intel ANS probe
  • Broken or misconfigured software causing network flooding

Pinpointing Performance Issues

  • Generating statistical charts and graphs
  • Applying color coding in Wireshark
  • Filtering traffic
  • Using the Wireshark Expert System and TCP/IP Resolution Flowchart

Troubleshooting Connections within a Secured Network Environment

  • Proxies, firewalls, and clients

Configuring Wireshark for Optimal Performance

  • Non-intrusive analysis

Troubleshooting

Summary and Conclusion

Requirements

  • A fundamental understanding of TCP/IP networking principles
 21 Hours

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