Kernel-Error
German technical blog about IT security, FreeBSD, mail infrastructure, DNS, and self-hosting by Sebastian van de Meer
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Kernel-Error is a German technical blog by IT security expert Sebastian van de Meer, running since 2003 with over 600 articles.
Key Topics
- IT Security: Penetration testing, system hardening, security research
- Mail Infrastructure: Postfix, Dovecot, SPF, DKIM, DMARC, DANE
- DNS & DNSSEC: BIND configuration, DoT/DoH
- Unix/BSD/Linux: FreeBSD administration (main focus)
- Self-Hosting: ZFS, Jails, high availability
- IoT & Embedded Systems: Smart device security, microcontrollers
About llms.txt Implementation
The site implements modern security standards including post-quantum cryptography, DNSSEC, DANE/TLSA, and strict email authentication policies. The llms.txt provides comprehensive documentation about the blog's technical content and focus areas.
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