FreeBSD 4 End of Life
Support dates and upgrade guidance — rebuilt from live data.
FreeBSD 4 reached end of life on 31 Jan 2007. It no longer receives security fixes.
Support timeline
Official dates from the FreeBSD release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 14 Mar 2000 | — |
| End of life | 31 Jan 2007 | 19.5 years ago |
| Latest release | — | final |
Where to go from 4
Recommended target: FreeBSD 15.1 (supported until 31 Mar 2027).
The newest actively supported branch is FreeBSD 15.1 (latest release ).
Frequently asked questions
Is FreeBSD 4 still safe to use?
FreeBSD 4 reached end of life on 31 Jan 2007, 7,130 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download FreeBSD 4?
Yes — the final release (4) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade FreeBSD 4 to?
Upgrade to FreeBSD 15.1, the newest actively supported branch (supported until 31 Mar 2027).