1.\" $OpenBSD: pf.4,v 1.4 2001/07/01 22:07:35 angelos Exp $ 2.\" 3.\" Copyright (C) 2001, Kjell Wooding. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. Neither the name of the project nor the names of its contributors 14.\" may be used to endorse or promote products derived from this software 15.\" without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.Dd June 24, 2001 30.Dt PF 4 31.Os 32.Sh NAME 33.Nm pf 34.Nd packet filter 35.Sh SYNOPSIS 36.Cd "pseudo-device pf 1" 37.Sh DESCRIPTION 38The 39.Nm 40interface is a packet filter pseudo-device for IPv4. 41.Pp 42.Nm 43is administered using the 44.Xr pfctl 8 45utility, or through an ioctl interface. 46.Sh FILES 47.Bl -tag -width /dev/pf -compact 48.It Pa /dev/pf 49packet filtering device. 50.El 51.Sh SEE ALSO 52.Xr bridge 4 , 53.Xr pfctl 8 54.Sh HISTORY 55The 56.Nm 57packet filtering mechanism first appeared in 58.Ox 3.0 . 59.Sh BUGS 60Probably several. 61