protocol-reverse-engineering

Capture and analyze network traffic to document custom protocols.

Updated Feb 24, 2026

Search Tags:#documentation #security #analysis #protocol #network #reverse engineering #capture

Ready to run

npx skills add https://github.com/nonputtipong/Oryn --skill protocol-reverse-engineering-nonputtipong

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: protocol-reverse-engineering
Source: https://github.com/nonputtipong/Oryn/tree/main/.agent/skills/protocol-reverse-engineering
Command: npx skills add https://github.com/nonputtipong/Oryn --skill protocol-reverse-engineering-nonputtipong

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps you understand and document unknown or proprietary network protocols by analyzing captured traffic and identifying patterns.

Core Features & Use Cases

Traffic Capture: Utilize tools like Wireshark, tcpdump, and mitmproxy to capture network data.
Protocol Analysis: Analyze captured packets using Wireshark, tshark, and Scapy for deep inspection.
Identification: Recognize common protocol signatures and header structures.
Documentation: Create clear specifications for custom protocols.
Testing: Employ fuzzing and replay techniques for validation.
Use Case: You suspect a custom application is communicating over a non-standard port. Use this Skill to capture the traffic, analyze the packet structure, and document the protocol to understand its commands and data formats.

Quick Start

Use the protocol-reverse-engineering skill to capture traffic on interface eth0 to a file named capture.pcap.

Frequently Asked Questions about protocol-reverse-engineering

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I analyze and document an unknown proprietary network protocol?▼

To analyze an unknown proprietary network protocol, you capture traffic using Wireshark or tcpdump, dissect packet structures with Scapy, identify header patterns, and document the custom protocol specifications for future reference.

What is the best way to capture and inspect network traffic on a specific interface?▼

The best way to capture and inspect network traffic is to use tcpdump to record packets from a network interface to a file, then use Wireshark or tshark for deep packet inspection and protocol dissection.

Can I use Lua dissectors to identify custom protocol signatures in Wireshark?▼

Yes, you can use Lua dissectors in Wireshark to identify custom protocol signatures and header patterns, enabling detailed inspection of non-standard or proprietary network communication structures.

How does protocol reverse engineering work for debugging non-standard port communication?▼

Protocol reverse engineering for non-standard port communication works by capturing the network traffic, analyzing the packet structure to identify signatures, and documenting the data formats to understand custom application commands.

Does this approach support traffic fuzzing and replay for protocol validation?▼

Yes, this approach supports protocol validation by employing fuzzing and replay techniques on captured traffic to test the robustness and security of the network communication and custom protocol implementation.