👨💻 About ComputerBas
Get FULL 100% A+ scores on all website security tests
🎯 Expertise
- Website Security Testing - SecurityHeaders.nl & CheckTLS.nl developed and utilized
- Email Security Testing - CheckTLS.com & LearnDMARC.com for SPF, DKIM, DMARC validation
- Perfect Security Scores - 100% A+ achieved on Internet.nl, SSL Labs, Mozilla Observatory
- Security Implementation - Comprehensive guides for server hardening and configuration
- Modern Web Standards - CSP, HSTS, security headers, TLS best practices
🎯 Main Mission
My focus is on two essential websites that help everyone improve their online security:
🔒 SecurityHeaders.nl
Test your HTTP security headers and receive an instant score (A++ to F). Checks: Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy. Provides concrete recommendations for every missing or misconfigured header.
🔐 CheckTLS.nl
Advanced TLS/SSL scanner powered by testssl.sh. Test your website for: supported TLS protocols (1.0, 1.1, 1.2, 1.3), cipher suites, certificate validity and chain, known vulnerabilities (Heartbleed, POODLE, BEAST, etc.), perfect forward secrecy, and SSL/TLS best practices.
📚 Implementation Guides
To achieve these security goals, I've written comprehensive guides that provide all the necessary knowledge:
- 📖 Debian 12 server setup with complete security hardening
- 📖 SSH configuration and secure remote access
- 📖 SSL/TLS certificates and HTTPS implementation
- 📖 HTTP Security Headers configuration (CSP, HSTS, etc.)
- 📖 Postfix mail server with SPF, DKIM, DMARC
- 📖 Firewall configuration and network security
- ➡️ And much more available in the documentation section
💡 Inspired by the Best
These tools were developed with inspiration from leading security platforms:
- ✅ SecurityHeaders.com - The pioneer in HTTP security header scanning
- ✅ SSL Labs (ssllabs.com) - The gold standard for SSL/TLS testing
- ✅ Mozilla Observatory (observatory.mozilla.org) - Comprehensive website security scans
- ✅ ImmuniWeb (immuniweb.com) - Professional security testing
- ✅ Internet.nl - Dutch standard for website security and modern internet standards
🌐 Websites & Projects
ComputerBas.nl
The central hub for IT documentation, tutorials and tools. Features:
- Comprehensive server administration guides
- Security best practices and implementation guides
- Desktop-style UI with modern features
- 100% scores on all security tests (Internet.nl, SSL Labs, Mozilla Observatory)
CheckTLS.nl
An advanced TLS/SSL security checker that analyzes websites for:
- SSL/TLS configuration and cipher suites
- Certificate validity and chain
- Protocol support and vulnerabilities
- Powered by testssl.sh
SecurityHeaders.nl
Analyzes HTTP security headers and provides recommendations for:
- Content Security Policy (CSP)
- HSTS implementation
- X-Frame-Options, X-Content-Type-Options
- Referrer Policy and Permissions Policy
UltimateParts.nl
Hardware recommendations and best buys for PC builds with:
- Dynamic prices from Tweakers.net
- Categories: CPU, GPU, Motherboards, RAM, SSDs
- Tier-based recommendations (Budget, Midrange, High-End)
🛠️ Tools & Software
Open-source tools developed by ComputerBas:
More tools available on GitHub.
📚 Documentation
All documentation available at /docs/
🏆 Achievements
- ✅ Internet.nl 100% - Full compliance with Dutch internet standards
- ✅ SSL Labs A+ - Perfect SSL/TLS configuration
- ✅ Mozilla Observatory A+ - Excellent security implementation
- ✅ SecurityHeaders A++ - Optimal HTTP security headers
- ✅ CryptCheck A+ - Strong cryptographic configuration
- ✅ Immuniweb A+ - Comprehensive web security
- ✅ HSTS Preload - Included in browser HSTS preload lists
💡 Philosophy
"Every website deserves to be secure. My mission is to share the tools and knowledge needed to make this possible for everyone." ComputerBas believes in:
- Security First - Implement security from day one
- Open Source - Share knowledge and code with the community
- Continuous Learning - Stay up-to-date with new technologies
- Best Practices - Follow industry standards and guidelines
- User Privacy - Respect user privacy and data
📞 Contact
Find ComputerBas online:
- 🌐 Website: www.computerbas.nl
- 💼 LinkedIn: linkedin.com/in/computerbas
- 🐙 GitHub: github.com/bashouse
- 👥 Facebook: facebook.com/computerbas "Build secure, fast, and reliable web solutions." Last updated: 01/01/2026
