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DNSBLOG(8)                                                          DNSBLOG(8)

       dnsblog - Postfix DNS white/blacklist logger

       <b>dnsblog</b> [generic Postfix daemon options]

       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.

       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.

       Problems and transactions are logged to <b>syslogd</b>(8).

       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

       <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b>
              The process name of a  Postfix  command  or  daemon

       <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-

       <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

       The Secure Mailer license must be  distributed  with  this

       This service was introduced with Postfix version 2.8.

       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

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