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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/blacklist domain name, IP address, and an ID. If
the 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. Otherwise it replies
with the query arguments plus an empty address list.
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).
<b>CONFIGURATION PARAMETERS</b>
Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically, as <b>dns-</b>
<b>blog</b>(8) 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> configuration 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, fil-
ters 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 direc-
tory.
<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>
The mail system name that is prepended to the
process name in syslog records, so that "smtpd"
becomes, for example, "postfix/smtpd".
<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
syslogd(5), 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
DNSBLOG(8)
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