0x20h.com

What It Is

0x20h.com, also known as Sp4ce's Blog, is a personal technical blog centered on cybersecurity. The site title clearly states “Focus on cyber security.” Currently captured information shows 92 articles, 45 tags, and 25 categories, with content covering CTF, code auditing, vulnerability reproduction, internal network penetration, Linux, Docker, VMware, Java/PHP security, and related topics.

Core Features

The site mainly serves as a personal knowledge base and record of security research. Its sections include Home, Articles, Tags, Categories, Links, CVEs, About Me, and Contact. The article topics lean toward hands-on practice, such as front-end remote code execution vulnerabilities in OpsManager, arbitrary user login vulnerabilities in the open-source Docker panel Dpanel, ALLATORI deobfuscation, and template deployment in vSphere environments. The tagging system is fairly detailed, making it easy to search by keywords such as SQLi, XSS, Pentest, CodeReview, VulRepro, and emergency response.

Pricing

This site is not a commercial security product, and no pricing information was found for memberships, courses, consulting, or paid downloads. Public articles appear to be freely accessible. It is worth noting that the site owner states that some encrypted articles will not be made public before fixes are completed due to legal reasons and vendor/client remediation needs, reflecting a degree of restraint in vulnerability disclosure.

Pros and Cons

The advantages are its focused content and strong practical orientation, making it suitable for security learners looking up specific vulnerability cases, tools, and environment configuration examples. It also organizes content through categories, tags, and archives, keeping search costs relatively low. The drawbacks are those typical of personal blogs: an unstable update cadence and a lack of systematic structure. Some content may be fragmented, resembling personal research notes more than complete tutorials. Site information such as visit counts and uptime appears blank on the page, so overall operational transparency is average.

Who It’s For

It is better suited to cybersecurity practitioners with some foundational knowledge, penetration testers, CTF players, code audit learners, and technical personnel who need references for security practices involving Linux, Docker, VMware, and similar environments. Beginners can also read some articles, but they may need to look up additional background knowledge.

Access in China

Judging from the domain and Chinese-language content, the site targets Chinese internet users. No mandatory login or dependency on overseas services was observed, so it should generally be directly accessible from mainland China. However, comments, analytics, or external resource loading may be affected by third-party services. Overall, this is an above-average personal security blog and is suitable as supplementary case-based learning material.