1<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" 2 "http://www.w3.org/TR/html4/loose.dtd"> 3<html> <head> 4<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> 5<title> Postfix manual - dnsblog(8) </title> 6</head> <body> <pre> 7DNSBLOG(8) DNSBLOG(8) 8 9<b>NAME</b> 10 dnsblog - Postfix DNS white/blacklist logger 11 12<b>SYNOPSIS</b> 13 <b>dnsblog</b> [generic Postfix daemon options] 14 15<b>DESCRIPTION</b> 16 The <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server implements an ad-hoc DNS white/blacklist lookup 17 service. This may eventually be replaced by an UDP client that is built 18 directly into the <a href="postscreen.8.html"><b>postscreen</b>(8)</a> server. 19 20<b>PROTOCOL</b> 21 With each connection, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server receives a DNS white/black- 22 list domain name, an IP address, and an ID. If the IP address is 23 listed under the DNS white/blacklist, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server logs the 24 match and replies with the query arguments plus an address list with 25 the resulting IP addresses, separated by whitespace, and the reply TTL. 26 Otherwise it replies with the query arguments plus an empty address 27 list and the reply TTL (-1 if unavailable). Finally, The <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> 28 server closes the connection. 29 30<b>DIAGNOSTICS</b> 31 Problems and transactions are logged to <b>syslogd</b>(8). 32 33<b>CONFIGURATION PARAMETERS</b> 34 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 35 run for only a limited amount of time. Use the command "<b>postfix reload</b>" 36 to speed up a change. 37 38 The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for 39 more details including examples. 40 41 <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b> 42 The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con- 43 figuration files. 44 45 <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b> 46 How much time a Postfix daemon process may take to handle a 47 request before it is terminated by a built-in watchdog timer. 48 49 <b><a href="postconf.5.html#postscreen_dnsbl_sites">postscreen_dnsbl_sites</a> (empty)</b> 50 Optional list of DNS white/blacklist domains, filters and weight 51 factors. 52 53 <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b> 54 The time limit for sending or receiving information over an 55 internal communication channel. 56 57 <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b> 58 The process ID of a Postfix command or daemon process. 59 60 <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b> 61 The process name of a Postfix command or daemon process. 62 63 <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b> 64 The location of the Postfix top-level queue directory. 65 66 <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b> 67 The syslog facility of Postfix logging. 68 69 <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b> 70 The mail system name that is prepended to the process name in 71 syslog records, so that "smtpd" becomes, for example, "post- 72 fix/smtpd". 73 74<b>SEE ALSO</b> 75 <a href="smtpd.8.html">smtpd(8)</a>, Postfix SMTP server 76 <a href="postconf.5.html">postconf(5)</a>, configuration parameters 77 syslogd(5), system logging 78 79<b>LICENSE</b> 80 The Secure Mailer license must be distributed with this software. 81 82<b>HISTORY</b> 83 This service was introduced with Postfix version 2.8. 84 85<b>AUTHOR(S)</b> 86 Wietse Venema 87 IBM T.J. Watson Research 88 P.O. Box 704 89 Yorktown Heights, NY 10598, USA 90 91 Wietse Venema 92 Google, Inc. 93 111 8th Avenue 94 New York, NY 10011, USA 95 96 DNSBLOG(8) 97</pre> </body> </html> 98