OpenBSD PF
The facts below are what the maker publishes about OpenBSD PF, checked and dated. Our editors have not written about it yet.
Plans and prices
From OpenBSD PF's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| OpenBSD PF | Free | Included in OpenBSD; part of the GENERIC kernel since OpenBSD 3.0 |
The facts
Each one read from OpenBSD PF's own pages, with the date it was checked.
What it does
- Documentation limit
- The PF FAQ is a general introduction and supplement to the manual pages, not a replacement for them.checked 11 Oct 2026
- Filtering
- Rules can pass or block packets based on criteria including network interface, address, port, and protocol.checked 11 Oct 2026
- Intended users
- The PF documentation is focused on users of the most current OpenBSD release.checked 11 Oct 2026
- Management
- PF can be enabled or disabled with pfctl, and its rules are read from pf.conf by default at boot.checked 11 Oct 2026
- Network features
- The guide covers NAT, traffic redirection, address pools, and load balancing.checked 11 Oct 2026
- Outbound control
- advancedchecked 22 Sep 2026
- Purpose
- PF filters TCP/IP traffic and performs Network Address Translation.checked 11 Oct 2026
- Redundancy
- The guide documents firewall redundancy using CARP and pfsync.checked 11 Oct 2026
- Rule direction
- bothchecked 22 Sep 2026
- Security
- PF provides an antispoof keyword for protection against address spoofing.checked 11 Oct 2026
- Stateful inspection
- PF tracks connection state in a state table, allowing packets in established connections to bypass ruleset evaluation.checked 11 Oct 2026
- Traffic handling
- PF can normalize and condition TCP/IP traffic, control bandwidth, and prioritize packets.checked 11 Oct 2026
Money
- Free plan
- Yeschecked 22 Sep 2026
Where it runs
- Supported platforms
- OpenBSDchecked 22 Sep 2026
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