Packet Capture

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