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				.\" $NetBSD: blacklistd.conf.5,v 1.3 2015/04/30 06:20:43 riz Exp $
				.\"
				.\" Copyright (c) 2015 The NetBSD Foundation, Inc.
				.\" All rights reserved.
				.\"
				.\" This code is derived from software contributed to The NetBSD Foundation
				.\" by Christos Zoulas.
				.\"
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				.Dd April 29, 2015
				.Dt BLACKLISTD.CONF 5
				.Os
				.Sh NAME
				.Nm blacklistd.conf
				.Nd configuration file format for blacklistd
				.Sh DESCRIPTION
				The
				.Nm
				files contains configuration lines for
				.Xr blacklistd 8 .
				It contains one entry per line, and is similar to
				.Xr inetd.conf 5 .
				There must be an entry for each field of the configuration file, with
				entries for each field separated by a tab or a space.
				Comments are denoted by a
				.Dq #
				at the beginning of a line.
				.Pp
				There are two kinds of configuration lines,
				.Va local
				and
				.Va remote .
				By default, configuration lines are
				.Va local ,
				i.e. the address specified refers to the addresses on the local machine.
				To switch to between
				.Va local
				and
				.Va remote
				configuration lines you can specify the stanzas:
				.Dq [local]
				and
				.Dq [remote] .
				.Pp
				On
				.Va local
				and
				.Va remote
				lines
				.Dq *
				means use the default, or wildcard match.
				In addition, for
				.Va remote
				lines
				.Dq =
				means use the values from the matched
				.Va local
				configuration line.
				.Pp
				The first four fields,
				.Va location ,
				.Va type ,
				.Va proto ,
				and
				.Va owner
				are used to match the
				.Va local
				or
				.Va remote
				addresses, whereas the last 3 fields
				.Va name ,
				.Va nfail ,
				and
				.Va disable
				are used to modify the filtering action.
				.Pp
				The first field denotes the
				.Va location
				as an address, mask, and port.
				The syntax for the
				.Va location
				is:
				.Bd -literal -offset indent
				[<address>\|<interface>][/<mask>][:<port>]
				.Ed
				.Pp
				The
				.Dv address
				can be an IPv4 address in numeric format, an IPv6 address
				in numeric format and enclosed by square brackets, or an interface name.
				Mask modifiers are not allowed on interfaces because interfaces
				have multiple address in different protocols where the mask has a different
				size.
				.Pp
				The
				.Dv mask
				is always numeric, but the
				.Dv port
				can be either numeric or symbolic.
				.Pp
				The second field is the socket
				.Va type :
				.Dv stream ,
				.Dv dgram ,
				or numeric.
				The third field is the
				.Va prococol :
				.Dv tcp ,
				.Dv udp ,
				.Dv tcp6 ,
				.Dv udp6 ,
				or numeric.
				The fourth file is the effective user
				.Va ( owner )
				of the daemon process reporting the event,
				either as a username or a userid.
				.Pp
				The rest of the fields are controlling the behavior of the filter.
				.Pp
				The
				.Va name
				field, is the name of the packet filter rule to be used.
				If the
				.Va name
				starts with a
				.Dq - ,
				then the default rulename is prepended to the given name.
				If the
				.Dv name
				contains a
				.Dq / ,
				the remaining portion of the name is interpreted as the mask to be
				applied to the address specified in the rule, so one can block whole
				subnets for a single rule violation.
				.Pp
				The
				.Va nfail
				field contains the number of failed attempts before access is blocked,
				defaulting to
				.Dq *
				meaning never, and the last field
				.Va disable
				specifies the amount of time since the last access that the blocking
				rule should be active, defaulting to
				.Dq *
				meaning forever.
				The default unit for
				.Va disable
				is seconds, but one can specify suffixes for different units, such as
				.Dq m
				for minutes
				.Dq h
				for hours and
				.Dq d
				for days.
				.Pp
				Matching is done first by checking the
				.Va local
				rules one by one, from the most specific to the least specific.
				If a match is found, then the
				.Va remote
				rules are applied, and if a match is found the
				.Va name ,
				.Va nfail ,
				and
				.Va disable
				fields can be altered by the
				.Va remote
				rule that matched.
				.Pp
				The
				.Va remote
				rules can be used for whitelisting specific addresses, changing the mask
				size, or the rule that the packet filter uses, the number of failed attempts,
				or the blocked duration.
				.Sh FILES
				.Bl -tag -width /etc/blacklistd.conf -compact
				.It Pa /etc/blacklistd.conf
				Configuration file.
				.El
				.Sh EXAMPLES
				.Bd -literal -offset
				# Block ssh, after 3 attempts for 6 hours on the bnx0 interface
				[local]
				# location type proto owner name nfail duration
				bnx0:ssh * * * * 3 6h
				[remote]
				# Never block 1.2.3.4
				1.2.3.4:ssh * * * * * *
				# For addresses coming from 8.8.0.0/16 block class C networks instead
				# individual hosts, but keep the rest of the blocking parameters the same.
				8.8.0.0/16:ssh * * * /24 = =
				.Ed
				.Sh SEE ALSO
				.Xr blacklistctl 8 ,
				.Xr blacklistd 8
				.Sh HISTORY
				.Nm
				appeared in
				.Nx 7 .
				.Sh AUTHORS
				.An Christos Zoulas