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 Duration 21 hours

Course Outline

Introduction

  • Wireshark as more than just a last-resort tool

Foundational Concepts in Network Troubleshooting

  • Root cause analysis

Wireshark Installation

Overview of Wireshark Capabilities

  • Navigating the user interface

Capturing Traffic in a Test Setting

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

Log Analysis

  • Examining HTTP packets
  • Observing bidirectional TCP streams
  • Saving logs for offline review

Investigating Connection Speed Issues on Specific Websites

  • Applying filters
  • Reviewing statistics

Analysis by Traffic Type

  • Examining DNS, ARP, IPv4, IPv6, ICMP, UDP, TCP, and HTTP/HTTPS
  • Addressing persistent slow connections over extended periods

Evaluating Response Times

  • Configuring delta time columns

Detecting Machines Compromised by Malware

  • Analyzing ARP traffic

Identifying Sources of Network Traffic

  • Intel ANS probe
  • Software that is broken or misconfigured (network flooding)

Pinpointing Performance Bottlenecks

  • Generating statistical charts and graphs
  • Customizing color settings in Wireshark
  • Filtering specific traffic
  • Utilizing the Wireshark Expert System and TCP/IP Resolution Flowchart

Resolving Connection Issues in Secure Network Environments

  • Managing proxies, firewalls, and clients

Optimizing Wireshark Configuration for Performance

  • Non-intrusive analysis

Troubleshooting Scenarios

Summary and Conclusion

Requirements

  • A solid understanding of TCP/IP networking principles

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