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+<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN"
+ "http://www.w3.org/TR/html4/loose.dtd">
+<html> <head>
+<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
+<title> Postfix manual - dnsblog(8) </title>
+</head> <body> <pre>
+DNSBLOG(8) DNSBLOG(8)
+
+<b>NAME</b>
+ dnsblog - Postfix DNS white/blacklist logger
+
+<b>SYNOPSIS</b>
+ <b>dnsblog</b> [generic Postfix daemon options]
+
+<b>DESCRIPTION</b>
+ The <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server implements an ad-hoc DNS white/blacklist lookup
+ service. This may eventually be replaced by an UDP client that is built
+ directly into the <a href="postscreen.8.html"><b>postscreen</b>(8)</a> server.
+
+<b>PROTOCOL</b>
+ With each connection, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server receives a DNS white/black-
+ list domain name, an IP address, and an ID. If the IP address is
+ listed under the DNS white/blacklist, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server logs the
+ match and replies with the query arguments plus an address list with
+ the resulting IP addresses, separated by whitespace, and the reply TTL.
+ Otherwise it replies with the query arguments plus an empty address
+ list and the reply TTL; the reply TTL is -1 if there is no reply, or a
+ negative reply that contains no SOA record. Finally, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a>
+ server closes the connection.
+
+<b>DIAGNOSTICS</b>
+ Problems and transactions are logged to <b>syslogd</b>(8) or <a href="postlogd.8.html"><b>postlogd</b>(8)</a>.
+
+<b>CONFIGURATION PARAMETERS</b>
+ Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically, as <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> processes
+ run for only a limited amount of time. Use the command "<b>postfix reload</b>"
+ to speed up a change.
+
+ The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for
+ more details including examples.
+
+ <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b>
+ The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con-
+ figuration files.
+
+ <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b>
+ How much time a Postfix daemon process may take to handle a
+ request before it is terminated by a built-in watchdog timer.
+
+ <b><a href="postconf.5.html#postscreen_dnsbl_sites">postscreen_dnsbl_sites</a> (empty)</b>
+ Optional list of DNS white/blacklist domains, filters and weight
+ factors.
+
+ <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b>
+ The time limit for sending or receiving information over an
+ internal communication channel.
+
+ <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b>
+ The process ID of a Postfix command or daemon process.
+
+ <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
+ The process name of a Postfix command or daemon process.
+
+ <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b>
+ The location of the Postfix top-level queue directory.
+
+ <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b>
+ The syslog facility of Postfix logging.
+
+ <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b>
+ A prefix that is prepended to the process name in syslog
+ records, so that, for example, "smtpd" becomes "prefix/smtpd".
+
+ Available in Postfix 3.3 and later:
+
+ <b><a href="postconf.5.html#service_name">service_name</a> (read-only)</b>
+ The <a href="master.5.html">master.cf</a> service name of a Postfix daemon process.
+
+<b>SEE ALSO</b>
+ <a href="smtpd.8.html">smtpd(8)</a>, Postfix SMTP server
+ <a href="postconf.5.html">postconf(5)</a>, configuration parameters
+ <a href="postlogd.8.html">postlogd(8)</a>, Postfix logging
+ syslogd(8), system logging
+
+<b>LICENSE</b>
+ The Secure Mailer license must be distributed with this software.
+
+<b>HISTORY</b>
+ This service was introduced with Postfix version 2.8.
+
+<b>AUTHOR(S)</b>
+ Wietse Venema
+ IBM T.J. Watson Research
+ P.O. Box 704
+ Yorktown Heights, NY 10598, USA
+
+ Wietse Venema
+ Google, Inc.
+ 111 8th Avenue
+ New York, NY 10011, USA
+
+ DNSBLOG(8)
+</pre> </body> </html>