.\" Copyright (c) 2019 Markus Hennecke <markus-hennecke@markus-hennecke.de>
.\"
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.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.Dd $Mdocdate: April 18 2019 $
.Dt SPAMD-DNSBLD 8
.Os
.Sh NAME
.Nm spamd-dnsbld
.Nd daemon watching the
.Xr spamd 8
logs and trapping hosts on dns black lists
.Sh SYNOPSIS
.Nm
.Bk -words
.Op Fl dnv
.Op Fl f Ar file
.Ek
.Sh DESCRIPTION
The
.Nm
daemon watches the
.Xr spamd 8
log entries and does black list lookups for the
IP addresses logged. If one of the configured black lists returns a
match
.Xr spamdb 8
is used to trap the offending IP address. Optional if no
match occurs the IP address can be whitelisted automatically.
.Pp
The options are as follows:
.Bl -tag -width "-f fileXXX"
.It Fl d
Do not daemonize.
If this option is specified,
.Nm
will run in the foreground and log to
.Em stderr .
.It Fl f Ar file
Use
.Ar file
as the configuration file, instead of the default
.Pa /etc/mail/spamd-dnsbld.conf .
.It Fl n
Configtest mode.
Only check the configuration file for validity.
.It Fl v
This option allows
.Nm
to send DEBUG priority messages to syslog.
.El
.Pp
When
.Nm
starts up, it reads settings from its configuration file, typically
.Xr spamd-dnsbld.conf 5 .
.Pp
Each time
.Xr spamd 8
logs an IP connecting, DNS lookups are done using all the configured lists.
If one of the lists return an IP address the connecting IP is trapped
by calling
.Pa /usr/sbin/spamdb -t -a IP .
If automatic whitelisting is configured the IP will be whitelisted using
.Xr spamdb 8
in case no list returned a valid result.
.Sh FILES
.Bl -tag -width "/etc/mail/spamd-dnsbld.conf" -compact
.It Pa /etc/mail/spamd-dnsbld.conf
Default configuration file.
.El
.Sh SEE ALSO
.Xr spamd 8 ,
.Xr spamdb 8