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<title> Postfix manual - dnsblog(8) </title>
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dnsblog - Postfix DNS white/blacklist logger
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<b>dnsblog</b> [generic Postfix daemon options]
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The <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server implements an ad-hoc DNS
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white/blacklist lookup service. This may eventually be
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replaced by an UDP client that is built directly into the
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<a href="postscreen.8.html"><b>postscreen</b>(8)</a> server.
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With each connection, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server receives a DNS
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white/blacklist domain name and an IP address. If the
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address is listed under the DNS white/blacklist, the <b>dns-</b>
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<b>blog</b>(8) server logs the match and replies with the query
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arguments plus a non-zero status. Otherwise it replies
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with the query arguments plus a zero status. Finally, The
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<a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server closes the connection.
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Problems and transactions are logged to <b>syslogd</b>(8).
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<b>CONFIGURATION PARAMETERS</b>
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Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically, as <b>dns-</b>
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<b>blog</b>(8) processes run for only a limited amount of time.
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Use the command "<b>postfix reload</b>" to speed up a change.
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The text below provides only a parameter summary. See
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<a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including examples.
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<b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
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The default location of the Postfix <a href="postconf.5.html">main.cf</a> and
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<a href="master.5.html">master.cf</a> configuration files.
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<b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
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How much time a Postfix daemon process may take to
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handle a request before it is terminated by a
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built-in watchdog timer.
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<b><a href="postconf.5.html#postscreen_dnsbl_sites">postscreen_dnsbl_sites</a> (empty)</b>
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Optional list of DNS white/blacklist domains, fil-
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ters and weight factors.
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<b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
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The time limit for sending or receiving information
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over an internal communication channel.
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<b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
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The process ID of a Postfix command or daemon
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<b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
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The process name of a Postfix command or daemon
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<b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
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The location of the Postfix top-level queue direc-
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<b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
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The syslog facility of Postfix logging.
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<b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
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The mail system name that is prepended to the
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process name in syslog records, so that "smtpd"
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becomes, for example, "postfix/smtpd".
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<a href="smtpd.8.html">smtpd(8)</a>, Postfix SMTP server
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<a href="postconf.5.html">postconf(5)</a>, configuration parameters
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syslogd(5), system logging
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The Secure Mailer license must be distributed with this
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This service was introduced with Postfix version 2.8.
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IBM T.J. Watson Research
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Yorktown Heights, NY 10598, USA
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