This article systematically breaks down the complete implementation of Nginx TCP Layer 4 port proxy and mTLS mutual encryption authentication. It covers core technical principles (TLS/mTLS mechanisms), certificate generation (root CA/server/client workflows), Nginx configuration (Stream module, SSL parameter optimization), and function verification (valid/invalid connection testing) with practical commands. It helps DevOps engineers and developers quickly…

Have you often encountered sudden lag on your Windows PC, received “low memory” warnings when opening multiple tasks, or watched the progress bar stall endlessly when running large software like Photoshop or Premiere Pro? Many times, this isn’t because your physical memory (RAM) is completely insufficient, but because your virtual memory configuration hasn’t kept up…

Blocking IPs dynamically in Nginx can effectively protect websites or applications from malicious requests, crawlers, or DDoS attacks. Compared to the traditional static method of modifying the configuration file and reloading Nginx, dynamic IP blocking can automatically identify and block malicious IPs in real-time, greatly enhancing security and operational efficiency. This article will elaborate on…

For backend developers, database administrators (DBAs), and DevOps engineers, MySQL data backup is a core component of ensuring business continuity. Whether addressing server failures, human errors, or data migration needs, a reliable backup strategy prevents catastrophic data loss. As a built-in command-line backup tool for MySQL, mysqldump stands out as the top choice for small to medium-sized database backups…

As a web developer, have you ever overlooked the Host header in HTTP requests? This seemingly ordinary field, once exploited by attackers, can lead to serious security issues such as password reset hijacking, cache poisoning, and even Server-Side Request Forgery (SSRF). This article will start from the vulnerability principle and share 3 battle-tested Nginx defense…

This article systematically explains the usage methods and practical scenarios of 8 common types of breakpoints with a defective form case, helping developers completely get rid of debugging dilemmas and significantly improve the efficiency of problem troubleshooting. As a front-end developer, have you often faced the dilemma of abnormal application behavior without being able to…

Zero-cost Cloudflare Custom Domain Email Tutorial: Build professional brand emails like [email protected] in 3 steps. Includes DNS setup guide, takes 10 mins for beginners, boosts trust for indie sites, blogs & SaaS products. When running an independent website, personal blog, or SaaS product, are you still using personal email accounts like Gmail or Outlook for…

This article details the internal architecture and SQL execution workflow of Gorm, the popular ORM framework for Go. It shares practical techniques for model definition, querying, and updating, while solving common issues like time zone discrepancies, soft deletion, and transactions. It is tailored for advanced Gorm developers. As the most widely used ORM (Object-Relational Mapping) framework…

This article details two implementation solutions for graphic CAPTCHAs in SpringBoot projects, including handwritten custom CAPTCHA utility classes and rapid integration of four types of CAPTCHAs (line-interfered, circle-interfered, distorted, and GIF) using the Hutool utility library. Complete code examples and API testing steps are provided to help developers address human-machine verification needs in scenarios such…

Technical Dilemmas in Embedded UI Development: From Requirements to Bottlenecks [Essential for Embedded UI Development] In the development of IoT, industrial control, and portable smart devices, how to build efficient graphical UIs in no-std, OS-less environments? Traditional terminal UI libraries are limited by resource constraints and hardware compatibility, becoming a major development pain point. This…