October 1995
Theo de Raadt forks OpenBSD
Theo de Raadt forked OpenBSD from NetBSD in October 1995 — pioneering proactive security auditing and code correctness.
What it was for
OpenBSD's 'only two remote holes in the default install' slogan and innovations like OpenSSH, LibreSSL, and W^X memory protection influenced secure systems design across the industry.
People
- Theo de Raadt — founder
Why it's here
OpenBSD set the standard for security-first UnixAn influential multitasking OS from the 1970s — files, pipes, and C shaped Linux, macOS, and BSD. development.
Why it mattered
OpenSSH alone secured remote administration for the entire internet.
What it solved
General-purpose BSDs did not prioritize continuous security review.
Media
ImageTheo de RaadtFAndrey, CC BY 2.0, via Wikimedia Commons