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, IP address, and an ID. If the address is listed 23 under the DNS white/blacklist, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server logs the match and 24 replies with the query arguments plus an address list with the result- 25 ing IP addresses separated by whitespace. Otherwise it replies with 26 the query arguments plus an empty address list. Finally, The <a href="dnsblog.8.html"><b>dns-</b></a> 27 <a href="dnsblog.8.html"><b>blog</b>(8)</a> server closes the connection. 28 29<b>DIAGNOSTICS</b> 30 Problems and transactions are logged to <b>syslogd</b>(8). 31 32<b>CONFIGURATION PARAMETERS</b> 33 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 34 run for only a limited amount of time. Use the command "<b>postfix reload</b>" 35 to speed up a change. 36 37 The text below provides only a parameter summary. See <a href="postconf.5.html"><b>postconf</b>(5)</a> for 38 more details including examples. 39 40 <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b> 41 The default location of the Postfix <a href="postconf.5.html">main.cf</a> and <a href="master.5.html">master.cf</a> con- 42 figuration files. 43 44 <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b> 45 How much time a Postfix daemon process may take to handle a 46 request before it is terminated by a built-in watchdog timer. 47 48 <b><a href="postconf.5.html#postscreen_dnsbl_sites">postscreen_dnsbl_sites</a> (empty)</b> 49 Optional list of DNS white/blacklist domains, filters and weight 50 factors. 51 52 <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b> 53 The time limit for sending or receiving information over an 54 internal communication channel. 55 56 <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b> 57 The process ID of a Postfix command or daemon process. 58 59 <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b> 60 The process name of a Postfix command or daemon process. 61 62 <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b> 63 The location of the Postfix top-level queue directory. 64 65 <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b> 66 The syslog facility of Postfix logging. 67 68 <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b> 69 The mail system name that is prepended to the process name in 70 syslog records, so that "smtpd" becomes, for example, "post- 71 fix/smtpd". 72 73<b>SEE ALSO</b> 74 <a href="smtpd.8.html">smtpd(8)</a>, Postfix SMTP server 75 <a href="postconf.5.html">postconf(5)</a>, configuration parameters 76 syslogd(5), system logging 77 78<b>LICENSE</b> 79 The Secure Mailer license must be distributed with this software. 80 81<b>HISTORY</b> 82 This service was introduced with Postfix version 2.8. 83 84<b>AUTHOR(S)</b> 85 Wietse Venema 86 IBM T.J. Watson Research 87 P.O. Box 704 88 Yorktown Heights, NY 10598, USA 89 90 DNSBLOG(8) 91</pre> </body> </html> 92