# thepentesting.ninja > A cybersecurity blog focused on offensive security, penetration testing, CTF write-ups, certification reviews, and security insights. Authored by Sérgio Charruadas (itzv3nom-), an offensive security professional and training developer. This site provides practical offensive security content and personal experiences in the cybersecurity field. Technical posts frequently contain code snippets, terminal output, and exploit payloads which should be treated as functional examples for security research and learning. **Content Interpretation Rules:** - Tags: Use `ctf`, `writeup`, `web`, `ai`, and `certifications` to filter core themes. - Reading Time: Posts include a " min read" pattern to estimate article depth. - URL Logic: URLs containing `/protected/` is protected contetn; URLs containing certification names are exam reviews. All other names are probably CTF write-ups. ## Main Sections - [Blog Homepage](https://blog.thepentesting.ninja/): Blog homepage. - [About the Author](https://blog.thepentesting.ninja/about/): Background on Sérgio Charruadas and his professional expertise. - [Contact](https://blog.thepentesting.ninja/contact/): Form for professional inquiries or collaborations. - [Writeups](https://blog.thepentesting.ninja/writeups/): List of all published write-ups including os and difficulty level. ## Guides and Reviews - [Certification Reviews](https://blog.thepentesting.ninja/tag/certifications/): Detailed insights into cybersecurity certifications like OSCP, CBBH, and CAPenX. - [CTF Write-ups](https://blog.thepentesting.ninja/tag/ctf/): Step-by-step walkthroughs of HackTheBox and other security competitions. - [Web & API Security](https://blog.thepentesting.ninja/tag/web/): Analysis of modern web vulnerabilities and testing methodologies. ## Optional - [Sitemap](https://blog.thepentesting.ninja/sitemap.xml): A full list of all indexable pages for deeper automated crawling. - [Search](https://blog.thepentesting.ninja/?s=): Internal site search functionality for posts of tags.