Packet Capture

Professional HTTP(S) Application Layer Tester: Making Testing More Controllable and Reliable

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Professional HTTP(S) Application Layer Tester: Making Testing More Controllable and Reliable

When conducting high-concurrency and high-complexity testing tasks, if the testing tool itself has performance bottlenecks, hidden faults, or uncontrolled resource consumption, it often leads to unreliable results. Therefore, a professional testing instrument must possess the ability to be “self-monitoring”, ensuring that the testing process itself is transparent and controllable. Our HTTP(S) application layer tester is … Read more

Essential Guide! Capturing HTTP MP4 Media Streams with Wireshark: From Traffic Capture to Content Parsing, Accessible for Beginners

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Essential Guide! Capturing HTTP MP4 Media Streams with Wireshark: From Traffic Capture to Content Parsing, Accessible for Beginners

Essential Guide! Capturing HTTP MP4 Media Streams with Wireshark: From Traffic Capture to Content Parsing, Accessible for Beginners Background Recently, while capturing packets on a mobile device, I discovered an interesting aspect: a major company’s video streaming is based on HTTP. This article analyzes the format of HTTP streaming media and shares insights that I … Read more

Practical TCP Connection Reuse: Analyzing HTTP Keep-Alive Through Packet Capture

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Practical TCP Connection Reuse: Analyzing HTTP Keep-Alive Through Packet Capture

Practical TCP Connection Reuse: Analyzing HTTP Keep-Alive Through Packet Capture In modern web architecture, keep-alive connections have become a key technology for improving performance and reducing latency. This article uses real Wireshark packet capture data to fully restore a complete local loopback communication process, focusing on the analysis of the TCP connection reuse mechanism, helping … Read more

Packet Capture of IPTV Set-Top Box (Part 4) – Using OpenWrt + Wireshark to Capture IPTV Set-Top Box Data Packets

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Packet Capture of IPTV Set-Top Box (Part 4) - Using OpenWrt + Wireshark to Capture IPTV Set-Top Box Data Packets

📺 IntroductionOpenWRT is a highly customizable Linux operating system designed specifically for embedded devices, especially smart routers and network devices.You can think of it as the “Android system” on your home router. Just like Android phones allow you to install various apps to achieve endless functionalities, OpenWRT also allows you to install various software packages … Read more

What Happens During an HTTP Request?

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What Happens During an HTTP Request?

Original link:https://blog.51cto.com/u_15155097/2719818 In this article, we will use a packet capture analysis tool to analyze how an <span><span>HTTP</span></span> request works. Environment Setup Initially, I wanted to find a website for packet capture analysis, but the <span><span>HTTP</span></span> requests in the production environment were too numerous and distracting, making analysis difficult. Therefore, I created a simple <span><span>demo</span></span> … Read more

Upgrading the Jiuxun K2 with OpenWRT: Expansion and Packet Capture

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Upgrading the Jiuxun K2 with OpenWRT: Expansion and Packet Capture

Introduction: While organizing my room today, I discovered a long-forgotten Jiuxun K2. After my last major modification, it had been lying in the corner of my room. Seeing it again reminded me of some sad memories, so I decided to upgrade it. 1. Flashing OpenWRT Firmware Why choose OpenWRT? First, pre-packaged firmware from others can … Read more

Layered Troubleshooting Method for Embedded Linux Network Issues

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Layered Troubleshooting Method for Embedded Linux Network Issues

Hello everyone, I am the Intelligence Guy~ In embedded Linux development, network issues are often “invisible killers”—sudden disconnections, inaccessible services, data packet loss… These may involve multiple aspects such as hardware, drivers, protocol stacks, and firewalls. Today, I will share how to troubleshoot network issues in embedded Linux, guiding you through the ultimate troubleshooting process … Read more

Core Principles of Web Crawlers: How an HTTP Request is Completed

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Core Principles of Web Crawlers: How an HTTP Request is Completed

Author: Da Mu Jiang https://my.oschina.net/luozhou/blog/3003053 Overview In the previous article, “Do You Know What Happens Behind the Scenes When You Ping?” we analyzed the process of a <span>Ping</span> using actual packet capture (a common interview question). We learned that <span>ping</span> relies on the <span>ICMP</span> protocol and also involves <span>ARP</span> requests in a local area network. … Read more

eCapture Observer: Android HTTPS Plaintext Packet Capture

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eCapture Observer: Android HTTPS Plaintext Packet Capture

Introduction Is it becoming increasingly difficult to capture HTTPS packets on Android systems? In high versions, adding CA certificates is not possible, and packet capture software relies on too many dependencies. When using VPN mode or HOOK programs, they can be detected by apps. The cost of countermeasures is rising. Is there a universal tool … Read more