Provided by: postfix_3.0.4-5build1_i386 bug

NAME

       dnsblog - Postfix DNS white/blacklist logger

SYNOPSIS

       dnsblog [generic Postfix daemon options]

DESCRIPTION

       The  dnsblog(8)  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 postscreen(8) server.

PROTOCOL

       With   each   connection,   the   dnsblog(8)   server  receives  a  DNS
       white/blacklist domain name, an IP address,  and  an  ID.   If  the  IP
       address  is listed under the DNS white/blacklist, the dnsblog(8) 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 dnsblog(8) server closes the connection.

DIAGNOSTICS

       Problems and transactions are logged to syslogd(8).

CONFIGURATION PARAMETERS

       Changes to main.cf are picked up automatically, as dnsblog(8) processes
       run for only a limited amount of time. Use the command "postfix reload"
       to speed up a change.

       The  text  below provides only a parameter summary. See postconf(5) for
       more details including examples.

       config_directory (see 'postconf -d' output)
              The default  location  of  the  Postfix  main.cf  and  master.cf
              configuration files.

       daemon_timeout (18000s)
              How  much  time  a  Postfix  daemon process may take to handle a
              request before it is terminated by a built-in watchdog timer.

       postscreen_dnsbl_sites (empty)
              Optional list of DNS white/blacklist domains, filters and weight
              factors.

       ipc_timeout (3600s)
              The  time  limit  for  sending  or receiving information over an
              internal communication channel.

       process_id (read-only)
              The process ID of a Postfix command or daemon process.

       process_name (read-only)
              The process name of a Postfix command or daemon process.

       queue_directory (see 'postconf -d' output)
              The location of the Postfix top-level queue directory.

       syslog_facility (mail)
              The syslog facility of Postfix logging.

       syslog_name (see 'postconf -d' output)
              The mail system name that is prepended to the  process  name  in
              syslog   records,   so   that   "smtpd"  becomes,  for  example,
              "postfix/smtpd".

SEE ALSO

       smtpd(8), Postfix SMTP server
       postconf(5), configuration parameters
       syslogd(5), system logging

LICENSE

       The Secure Mailer license must be distributed with this software.

HISTORY

       This service was introduced with Postfix version 2.8.

AUTHOR(S)

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

                                                             DNSBLOG(8postfix)