1DNSBLOG(8) System Manager's Manual DNSBLOG(8)
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6 dnsblog - Postfix DNS white/blacklist logger
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9 dnsblog [generic Postfix daemon options]
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12 The dnsblog(8) server implements an ad-hoc DNS white/blacklist lookup
13 service. This may eventually be replaced by an UDP client that is built
14 directly into the postscreen(8) server.
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17 With each connection, the dnsblog(8) server receives a DNS white/black‐
18 list domain name, IP address, and an ID. If the address is listed
19 under the DNS white/blacklist, the dnsblog(8) server logs the match and
20 replies with the query arguments plus an address list with the result‐
21 ing IP addresses separated by whitespace. Otherwise it replies with
22 the query arguments plus an empty address list. Finally, The dns‐
23 blog(8) server closes the connection.
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26 Problems and transactions are logged to syslogd(8).
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29 Changes to main.cf are picked up automatically, as dnsblog(8) processes
30 run for only a limited amount of time. Use the command "postfix reload"
31 to speed up a change.
32 The text below provides only a parameter summary. See postconf(5) for
34 more details including examples.
35 config_directory (see 'postconf -d' output)
37 The default location of the Postfix main.cf and master.cf con‐
38 figuration files.
39 daemon_timeout (18000s)
41 How much time a Postfix daemon process may take to handle a
42 request before it is terminated by a built-in watchdog timer.
43 postscreen_dnsbl_sites (empty)
45 Optional list of DNS white/blacklist domains, filters and weight
46 factors.
47 ipc_timeout (3600s)
49 The time limit for sending or receiving information over an
50 internal communication channel.
51 process_id (read-only)
53 The process ID of a Postfix command or daemon process.
54 process_name (read-only)
56 The process name of a Postfix command or daemon process.
57 queue_directory (see 'postconf -d' output)
59 The location of the Postfix top-level queue directory.
60 syslog_facility (mail)
62 The syslog facility of Postfix logging.
63 syslog_name (see 'postconf -d' output)
65 The mail system name that is prepended to the process name in
66 syslog records, so that "smtpd" becomes, for example, "post‐
67 fix/smtpd".
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70 smtpd(8), Postfix SMTP server
71 postconf(5), configuration parameters
72 syslogd(5), system logging
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75 The Secure Mailer license must be distributed with this software.
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78 This service was introduced with Postfix version 2.8.
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81 Wietse Venema
82 IBM T.J. Watson Research
83 P.O. Box 704
84 Yorktown Heights, NY 10598, USA
85 DNSBLOG(8)