1 .\" $NetBSD: pflog.4,v 1.5 2009/03/21 00:15:53 perry Exp $
2 .\" $OpenBSD: pflog.4,v 1.10 2007/05/31 19:19:51 jmc Exp $
4 .\" Copyright (c) 2001 Tobias Weingartner
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32 .Nd packet filter logging interface
34 .Cd "pseudo-device pflog"
38 interface is a pseudo-device which makes visible all packets logged by
41 Logged packets can easily be monitored in real
46 interface, or stored to disk using
49 The pflog0 interface is created automatically at boot if both
54 further instances can be created using
57 Each packet retrieved on this interface has a header associated
60 This header documents the address family, interface name, rule
61 number, reason, action, and direction of the packet that was logged.
62 This structure, defined in
65 .Bd -literal -offset indent
71 char ifname[IFNAMSIZ];
72 char ruleset[PF_RULESET_NAME_SIZE];
87 and monitor all packets logged on it:
88 .Bd -literal -offset indent
90 # tcpdump -n -e -ttt -i pflog1
103 device first appeared in