description OpenBSD Overview
OpenBSD is a Unix-like, free and open-source operating system renowned for its stringent security focus, achieved through extensive code auditing, proactive vulnerability disclosure, and a commitment to cryptographic standards.
help OpenBSD FAQ
Is OpenBSD based on Linux?
No. OpenBSD is a Unix-like BSD operating system that began as a fork of NetBSD in 1995, led by Theo de Raadt.
What does OpenBSD's secure by default approach mean?
The default installation aims to expose a small attack surface, with nonessential services disabled or restricted unless the administrator enables them. The project also emphasizes ongoing source-code auditing and public security disclosure.
Did the OpenBSD project create OpenSSH?
Yes. OpenBSD developed OpenSSH as a secure replacement for insecure remote-login tools, and it became widely used beyond OpenBSD on Linux, macOS, and other Unix-like systems.
What kinds of systems commonly use OpenBSD?
OpenBSD is used for firewalls, routers, security appliances, servers, and specialist Unix systems where conservative defaults matter. The project also provides ports and packages for additional software, although its ecosystem is smaller than mainstream Linux distributions.
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