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
