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 17 white/blacklist lookup service. This may eventually be 18 replaced by an UDP client that is built directly into the 19 <a href="postscreen.8.html"><b>postscreen</b>(8)</a> server. 20 21<b>PROTOCOL</b> 22 With each connection, the <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server receives a DNS 23 white/blacklist domain name, IP address, and an ID. If 24 the address is listed under the DNS white/blacklist, the 25 <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server logs the match and replies with the 26 query arguments plus an address list with the resulting IP 27 addresses separated by whitespace. Otherwise it replies 28 with the query arguments plus an empty address list. 29 Finally, The <a href="dnsblog.8.html"><b>dnsblog</b>(8)</a> server closes the connection. 30 31<b>DIAGNOSTICS</b> 32 Problems and transactions are logged to <b>syslogd</b>(8). 33 34<b>CONFIGURATION PARAMETERS</b> 35 Changes to <a href="postconf.5.html"><b>main.cf</b></a> are picked up automatically, as <b>dns-</b> 36 <b>blog</b>(8) processes run for only a limited amount of time. 37 Use the command "<b>postfix reload</b>" to speed up a change. 38 39 The text below provides only a parameter summary. See 40 <a href="postconf.5.html"><b>postconf</b>(5)</a> for more details including examples. 41 42 <b><a href="postconf.5.html#config_directory">config_directory</a> (see 'postconf -d' output)</b> 43 The default location of the Postfix <a href="postconf.5.html">main.cf</a> and 44 <a href="master.5.html">master.cf</a> configuration files. 45 46 <b><a href="postconf.5.html#daemon_timeout">daemon_timeout</a> (18000s)</b> 47 How much time a Postfix daemon process may take to 48 handle a request before it is terminated by a 49 built-in watchdog timer. 50 51 <b><a href="postconf.5.html#postscreen_dnsbl_sites">postscreen_dnsbl_sites</a> (empty)</b> 52 Optional list of DNS white/blacklist domains, fil- 53 ters and weight factors. 54 55 <b><a href="postconf.5.html#ipc_timeout">ipc_timeout</a> (3600s)</b> 56 The time limit for sending or receiving information 57 over an internal communication channel. 58 59 <b><a href="postconf.5.html#process_id">process_id</a> (read-only)</b> 60 The process ID of a Postfix command or daemon 61 process. 62 63 <b><a href="postconf.5.html#process_name">process_name</a> (read-only)</b> 64 The process name of a Postfix command or daemon 65 process. 66 67 <b><a href="postconf.5.html#queue_directory">queue_directory</a> (see 'postconf -d' output)</b> 68 The location of the Postfix top-level queue direc- 69 tory. 70 71 <b><a href="postconf.5.html#syslog_facility">syslog_facility</a> (mail)</b> 72 The syslog facility of Postfix logging. 73 74 <b><a href="postconf.5.html#syslog_name">syslog_name</a> (see 'postconf -d' output)</b> 75 The mail system name that is prepended to the 76 process name in syslog records, so that "smtpd" 77 becomes, for example, "postfix/smtpd". 78 79<b>SEE ALSO</b> 80 <a href="smtpd.8.html">smtpd(8)</a>, Postfix SMTP server 81 <a href="postconf.5.html">postconf(5)</a>, configuration parameters 82 syslogd(5), system logging 83 84<b>LICENSE</b> 85 The Secure Mailer license must be distributed with this 86 software. 87 88<b>HISTORY</b> 89 This service was introduced with Postfix version 2.8. 90 91<b>AUTHOR(S)</b> 92 Wietse Venema 93 IBM T.J. Watson Research 94 P.O. Box 704 95 Yorktown Heights, NY 10598, USA 96 97 DNSBLOG(8) 98</pre> </body> </html> 99