<!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/blacklist domain name and an IP address. If the address is listed under the DNS white/blacklist, the <b>dns-</b> <b>blog</b>(8) server logs the match and replies with the query arguments plus a non-zero status. Otherwise it replies with the query arguments plus a zero status. 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) </pre> </body> </html>