A comprehensive guide to garbage code (anti-disassembly instructions) – core principles, 8 practical implementations with full code, IDA disassembly detection, and dynamic debugging removal tips for security researchers and reverse engineers. Introduction In the field of reverse engineering and software protection, garbage code is a “classic technique” to counter disassembly tools. By constructing special instruction…

Have you ever noticed the difference between “http://” and “https://” when typing a URL? What does the small lock icon next to the address bar signify when you make a payment on an e-commerce platform or log into a social media account? In internet communications, terms like HTTP, HTTPS, and SSL/TLS appear frequently—they are not…

As one of the most widely used JSON parsing libraries in the Java ecosystem, Fastjson is favored for its high performance. However, its deserialization vulnerabilities—especially CVE-2022-25845—have repeatedly led to large-scale security incidents. Attackers only need to construct malicious JSON strings to achieve Remote Code Execution (RCE) and take full control of servers. This article breaks…

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…