| Original author(s) | Daniel Hartmeier |
|---|---|
| Developer(s) | The OpenBSD Project |
| Initial release | 1 December 2001 |
| Repository | |
| Written in | C |
| Operating system | OpenBSD |
| Type | Packet filtering |
| License | BSD license |
| Website | www |
PF (Packet Filter, also written pf) is a BSD licensed stateful packet filter, a central piece of software for firewalling. It is comparable to netfilter (iptables), ipfw, and ipfilter.
PF was developed for OpenBSD, but has been ported to many other operating systems.