Protocol Analysis with Tshark
Learn protocol analysis with tshark, the command-line engine behind Wireshark. While basic packet capture tells you what crossed the network, tshark helps you understand how protocols behaved inside that traffic. This course teaches you how to apply protocol-aware filters, reconstruct conversations, extract specific fields, and automate high-signal traffic analysis for threat hunting and incident response.
Why It Matters
Security investigations often produce large packet captures that are too noisy to review packet by packet. tshark solves that problem by combining Wireshark's protocol awareness with command-line speed and automation. That makes it useful for SOC analysts, threat hunters, and responders who need to extract answers quickly from real traffic.
This course moves beyond simple sniffing. You will learn how to reconstruct streams, isolate application-layer behavior, and export structured protocol data that can feed reports, scripts, and larger investigation workflows.
What You Will Learn
- Apply protocol-aware display filters to focus on specific DNS, HTTP, TLS, and transport-layer activity.
- Reconstruct full network conversations from individual packets.
- Extract specific fields such as hostnames, URIs, and request metadata from packet captures.
- Format traffic data into machine-friendly output for faster analysis.
- Use
tsharkto automate traffic investigation in a realistic threat-hunting scenario.
Course Roadmap
- Introduction to Tshark: Learn the core workflow, command structure, and protocol-aware filtering capabilities of
tshark. - Following Network Streams: Rebuild TCP and UDP conversations so you can read interactions as complete sessions instead of isolated packets.
- Extracting Fields and Formatting: Export targeted protocol fields and customize output for efficient parsing and reporting.
- Automated Traffic Analysis: Apply
tsharkto a malware-style investigation where you identify suspicious domains and reconstruct a malicious download path.
Who This Course Is For
- Learners who already understand basic packet capture and want deeper protocol visibility.
- SOC analysts and defenders who need faster command-line traffic analysis.
- Security practitioners who want to automate repetitive packet review tasks.
Outcomes
By the end of this course, you will be able to use tshark to filter, reconstruct, and extract meaningful protocol data from noisy captures. You will also be prepared for later courses that depend on strong traffic analysis and evidence-driven investigation.
