1 .\" $OpenBSD: pflog.4,v 1.10 2007/05/31 19:19:51 jmc Exp $
3 .\" Copyright (c) 2001 Tobias Weingartner
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33 .Nd packet filter logging interface
39 interface is a device which makes visible all packets logged by
42 Logged packets can easily be monitored in real
47 interface, or stored to disk using
50 The pflog0 interface is created automatically at boot if both
55 further instances can be created using
58 Each packet retrieved on this interface has a header associated
61 This header documents the address family, interface name, rule
62 number, reason, action, and direction of the packet that was logged.
63 This structure, defined in
66 .Bd -literal -offset indent
72 char ifname[IFNAMSIZ];
73 char ruleset[PF_RULESET_NAME_SIZE];
88 and monitor all packets logged on it:
89 .Bd -literal -offset indent
91 # tcpdump -n -e -ttt -i pflog1
104 device first appeared in