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LinkedIn Learning

Wireshark: Network Troubleshooting

via LinkedIn Learning

Overview

Learn how to analyze network problems with Wireshark, a free, open-source packet analysis tool that helps identify congestion issues, suspicious activity, and network intrusions.

Syllabus

Introduction
  • Analyze network problems
  • What you need to know
1. Traffic Capture and Analysis
  • Getting the most out of Wireshark
  • Navigating the Wireshark interface
  • Investigating the Edit menu choice
  • Exploring the View menu choice
  • Getting ready to capture
  • Examining a capture
  • Challenge: Examining evidence of congestion
  • Solution: Examining evidence of congestion
2. Using Time as a Metric
  • Displaying time
  • Viewing details and expert information
  • Graphing the TCP streams
  • Challenge: Using time to view gaps in transmission
  • Solution: Using time to view gaps in transmission
3. Wireshark Tools
  • Viewing conversations and endpoints
  • Creating a flow graph
  • Plot an I/O graph
  • Challenge: Using a flow graph
  • Solution: Using a flow graph
4. Recognizing Abnormal or Malicious Traffic
  • Troubleshooting the network
  • Spotting an ARP storm
  • Identifying bursty traffic
  • Protecting from packet sniffing
  • Examining macof attacks
  • Challenge: Viewing unencrypted traffic
  • Solution: Viewing unencrypted traffic
Conclusion
  • What's next?

Taught by

Lisa Bock

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