mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
108 lines
2.9 KiB
Groff
108 lines
2.9 KiB
Groff
.\" $OpenBSD: pflog.4,v 1.10 2007/05/31 19:19:51 jmc Exp $
|
|
.\"
|
|
.\" Copyright (c) 2001 Tobias Weingartner
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd May 31, 2007
|
|
.Dt PFLOG 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pflog
|
|
.Nd packet filter logging interface
|
|
.Sh SYNOPSIS
|
|
.Cd "device pflog"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm pflog
|
|
interface is a device which makes visible all packets logged by
|
|
the packet filter,
|
|
.Xr pf 4 .
|
|
Logged packets can easily be monitored in real
|
|
time by invoking
|
|
.Xr tcpdump 1
|
|
on the
|
|
.Nm
|
|
interface, or stored to disk using
|
|
.Xr pflogd 8 .
|
|
.Pp
|
|
The pflog0 interface is created automatically at boot if both
|
|
.Xr pf 4
|
|
and
|
|
.Xr pflogd 8
|
|
are enabled;
|
|
further instances can be created using
|
|
.Xr ifconfig 8 .
|
|
.Pp
|
|
Each packet retrieved on this interface has a header associated
|
|
with it of length
|
|
.Dv PFLOG_HDRLEN .
|
|
This header documents the address family, interface name, rule
|
|
number, reason, action, and direction of the packet that was logged.
|
|
This structure, defined in
|
|
.Aq Pa net/if_pflog.h
|
|
looks like
|
|
.Bd -literal -offset indent
|
|
struct pfloghdr {
|
|
u_int8_t length;
|
|
sa_family_t af;
|
|
u_int8_t action;
|
|
u_int8_t reason;
|
|
char ifname[IFNAMSIZ];
|
|
char ruleset[PF_RULESET_NAME_SIZE];
|
|
u_int32_t rulenr;
|
|
u_int32_t subrulenr;
|
|
uid_t uid;
|
|
pid_t pid;
|
|
uid_t rule_uid;
|
|
pid_t rule_pid;
|
|
u_int8_t dir;
|
|
u_int8_t pad[3];
|
|
};
|
|
.Ed
|
|
.Sh EXAMPLES
|
|
Create a
|
|
.Nm
|
|
interface
|
|
and monitor all packets logged on it:
|
|
.Bd -literal -offset indent
|
|
# ifconfig pflog1 up
|
|
# tcpdump -n -e -ttt -i pflog1
|
|
.Ed
|
|
.Sh SEE ALSO
|
|
.Xr tcpdump 1 ,
|
|
.Xr inet 4 ,
|
|
.Xr inet6 4 ,
|
|
.Xr netintro 4 ,
|
|
.Xr pf 4 ,
|
|
.Xr ifconfig 8 ,
|
|
.Xr pflogd 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device first appeared in
|
|
.Ox 3.0 .
|
|
.\" .Sh BUGS
|
|
.\" Anything here?
|