Advanced Wireshark Troubleshooting Training in Dublin, Ireland

This course is designed for experienced network professionals who want to take their Wireshark troubleshooting skills to the next level. It focuses on advanced packet analysis techniques, deep protocol diagnostics, performance optimization, and real-world problem scenarios. Participants will work on complex case studies to master high-level troubleshooting workflows.

Advanced Capture and Filtering Techniques

Module 1: High-Precision Capture Strategies

• Selecting optimal capture points in complex networks
• Capturing from multiple interfaces and merging captures
• Remote captures via SSH, RPCAP, and dumpcap

Module 2: Capture Performance Optimization

• Minimizing dropped packets during high-volume captures
• Using capture filters to reduce file size
• Ring buffers and time-based capture rotation

Module 3: Advanced Display Filters

• Complex filter expressions with AND, OR, NOT
• Field-based filtering using protocol-specific fields
• Reusing and saving advanced filters

Module 4: Customizing Wireshark for Efficiency

• Advanced profile configurations
• Custom columns for troubleshooting metrics
• Advanced coloring rules for quick identification

Deep Protocol and Performance Analysis

Module 5: Advanced Ethernet, VLAN, and ARP Analysis

• Troubleshooting VLAN misconfigurations and tagging issues
• Detecting ARP poisoning or excessive broadcasts

Module 6: TCP Advanced Diagnostics

• Detailed handshake and teardown troubleshooting
• TCP zero-window and flow control stalls
• Analyzing retransmissions, duplicate ACKs, and spurious retransmits

Module 7: UDP and Application-Layer Troubleshooting

• Jitter and packet loss in VoIP and video
• DNS performance problems and caching issues
• Troubleshooting DHCP lease and renewal issues

Module 8: Latency and Throughput Analysis

• Measuring round-trip times and sequence analysis
• TCP window scaling and buffer tuning
• Differentiating between network and application delays

Complex Troubleshooting and Case Studies

Module 9: Advanced Analysis Tools in Wireshark

• Expert Info deep dive
• Protocol Hierarchy and flow graphs for multi-protocol issues
• I/O graphs and time sequence graphs for performance analysis

Module 10: Detecting Anomalies and Security Events

• Identifying scanning and reconnaissance activity
• Spotting DoS, flooding, and unusual traffic patterns
• Recognizing encrypted traffic anomalies

Module 11: Multi-Layer Troubleshooting Workflow

• Layer-by-layer isolation of network problems
• Combining packet analysis with external logs and metrics
• Documenting and presenting troubleshooting findings

Module 12: Final Real-World Case Studies

• Complex multi-site application slowdown
• Intermittent VoIP call drop analysis
• High packet loss in encrypted VPN traffic

Final Assessment

Review and Q&A