example.conf.in revision 1.1.1.3
1#
2# Example configuration file.
3#
4# See unbound.conf(5) man page, version 1.7.3.
5#
6# this is a comment.
7
8#Use this to include other text into the file.
9#include: "otherfile.conf"
10
11# The server clause sets the main parameters.
12server:
13	# whitespace is not necessary, but looks cleaner.
14
15	# verbosity number, 0 is least verbose. 1 is default.
16	verbosity: 1
17
18	# print statistics to the log (for every thread) every N seconds.
19	# Set to "" or 0 to disable. Default is disabled.
20	# statistics-interval: 0
21
22	# enable shm for stats, default no.  if you enable also enable
23	# statistics-interval, every time it also writes stats to the
24	# shared memory segment keyed with shm-key.
25	# shm-enable: no
26
27	# shm for stats uses this key, and key+1 for the shared mem segment.
28	# shm-key: 11777
29
30	# enable cumulative statistics, without clearing them after printing.
31	# statistics-cumulative: no
32
33	# enable extended statistics (query types, answer codes, status)
34	# printed from unbound-control. default off, because of speed.
35	# extended-statistics: no
36
37	# number of threads to create. 1 disables threading.
38	# num-threads: 1
39
40	# specify the interfaces to answer queries from by ip-address.
41	# The default is to listen to localhost (127.0.0.1 and ::1).
42	# specify 0.0.0.0 and ::0 to bind to all available interfaces.
43	# specify every interface[@port] on a new 'interface:' labelled line.
44	# The listen interfaces are not changed on reload, only on restart.
45	# interface: 192.0.2.153
46	# interface: 192.0.2.154
47	# interface: 192.0.2.154@5003
48	# interface: 2001:DB8::5
49
50	# enable this feature to copy the source address of queries to reply.
51	# Socket options are not supported on all platforms. experimental.
52	# interface-automatic: no
53
54	# port to answer queries from
55	# port: 53
56
57	# specify the interfaces to send outgoing queries to authoritative
58	# server from by ip-address. If none, the default (all) interface
59	# is used. Specify every interface on a 'outgoing-interface:' line.
60	# outgoing-interface: 192.0.2.153
61	# outgoing-interface: 2001:DB8::5
62	# outgoing-interface: 2001:DB8::6
63
64	# Specify a netblock to use remainder 64 bits as random bits for
65	# upstream queries.  Uses freebind option (Linux).
66	# outgoing-interface: 2001:DB8::/64
67	# Also (Linux:) ip -6 addr add 2001:db8::/64 dev lo
68	# And: ip -6 route add local 2001:db8::/64 dev lo
69	# And set prefer-ip6: yes to use the ip6 randomness from a netblock.
70	# Set this to yes to prefer ipv6 upstream servers over ipv4.
71	# prefer-ip6: no
72
73	# number of ports to allocate per thread, determines the size of the
74	# port range that can be open simultaneously.  About double the
75	# num-queries-per-thread, or, use as many as the OS will allow you.
76	# outgoing-range: 4096
77
78	# permit unbound to use this port number or port range for
79	# making outgoing queries, using an outgoing interface.
80	# outgoing-port-permit: 32768
81
82	# deny unbound the use this of port number or port range for
83	# making outgoing queries, using an outgoing interface.
84	# Use this to make sure unbound does not grab a UDP port that some
85	# other server on this computer needs. The default is to avoid
86	# IANA-assigned port numbers.
87	# If multiple outgoing-port-permit and outgoing-port-avoid options
88	# are present, they are processed in order.
89	# outgoing-port-avoid: "3200-3208"
90
91	# number of outgoing simultaneous tcp buffers to hold per thread.
92	# outgoing-num-tcp: 10
93
94	# number of incoming simultaneous tcp buffers to hold per thread.
95	# incoming-num-tcp: 10
96
97	# buffer size for UDP port 53 incoming (SO_RCVBUF socket option).
98	# 0 is system default.  Use 4m to catch query spikes for busy servers.
99	# so-rcvbuf: 0
100
101	# buffer size for UDP port 53 outgoing (SO_SNDBUF socket option).
102	# 0 is system default.  Use 4m to handle spikes on very busy servers.
103	# so-sndbuf: 0
104
105	# use SO_REUSEPORT to distribute queries over threads.
106	# so-reuseport: no
107
108	# use IP_TRANSPARENT so the interface: addresses can be non-local
109	# and you can config non-existing IPs that are going to work later on
110	# (uses IP_BINDANY on FreeBSD).
111	# ip-transparent: no
112
113	# use IP_FREEBIND so the interface: addresses can be non-local
114	# and you can bind to nonexisting IPs and interfaces that are down.
115	# Linux only.  On Linux you also have ip-transparent that is similar.
116	# ip-freebind: no
117
118	# EDNS reassembly buffer to advertise to UDP peers (the actual buffer
119	# is set with msg-buffer-size). 1472 can solve fragmentation (timeouts)
120	# edns-buffer-size: 4096
121
122	# Maximum UDP response size (not applied to TCP response).
123	# Suggested values are 512 to 4096. Default is 4096. 65536 disables it.
124	# max-udp-size: 4096
125
126	# buffer size for handling DNS data. No messages larger than this
127	# size can be sent or received, by UDP or TCP. In bytes.
128	# msg-buffer-size: 65552
129
130	# the amount of memory to use for the message cache.
131	# plain value in bytes or you can append k, m or G. default is "4Mb".
132	# msg-cache-size: 4m
133
134	# the number of slabs to use for the message cache.
135	# the number of slabs must be a power of 2.
136	# more slabs reduce lock contention, but fragment memory usage.
137	# msg-cache-slabs: 4
138
139	# the number of queries that a thread gets to service.
140	# num-queries-per-thread: 1024
141
142	# if very busy, 50% queries run to completion, 50% get timeout in msec
143	# jostle-timeout: 200
144
145	# msec to wait before close of port on timeout UDP. 0 disables.
146	# delay-close: 0
147
148	# the amount of memory to use for the RRset cache.
149	# plain value in bytes or you can append k, m or G. default is "4Mb".
150	# rrset-cache-size: 4m
151
152	# the number of slabs to use for the RRset cache.
153	# the number of slabs must be a power of 2.
154	# more slabs reduce lock contention, but fragment memory usage.
155	# rrset-cache-slabs: 4
156
157	# the time to live (TTL) value lower bound, in seconds. Default 0.
158	# If more than an hour could easily give trouble due to stale data.
159	# cache-min-ttl: 0
160
161	# the time to live (TTL) value cap for RRsets and messages in the
162	# cache. Items are not cached for longer. In seconds.
163	# cache-max-ttl: 86400
164
165	# the time to live (TTL) value cap for negative responses in the cache
166	# cache-max-negative-ttl: 3600
167
168	# the time to live (TTL) value for cached roundtrip times, lameness and
169	# EDNS version information for hosts. In seconds.
170	# infra-host-ttl: 900
171
172	# minimum wait time for responses, increase if uplink is long. In msec.
173	# infra-cache-min-rtt: 50
174
175	# the number of slabs to use for the Infrastructure cache.
176	# the number of slabs must be a power of 2.
177	# more slabs reduce lock contention, but fragment memory usage.
178	# infra-cache-slabs: 4
179
180	# the maximum number of hosts that are cached (roundtrip, EDNS, lame).
181	# infra-cache-numhosts: 10000
182
183	# define a number of tags here, use with local-zone, access-control.
184	# repeat the define-tag statement to add additional tags.
185	# define-tag: "tag1 tag2 tag3"
186
187	# Enable IPv4, "yes" or "no".
188	# do-ip4: yes
189
190	# Enable IPv6, "yes" or "no".
191	# do-ip6: yes
192
193	# Enable UDP, "yes" or "no".
194	# do-udp: yes
195
196	# Enable TCP, "yes" or "no".
197	# do-tcp: yes
198
199	# upstream connections use TCP only (and no UDP), "yes" or "no"
200	# useful for tunneling scenarios, default no.
201	# tcp-upstream: no
202
203	# upstream connections also use UDP (even if do-udp is no).
204	# useful if if you want UDP upstream, but don't provide UDP downstream.
205	# udp-upstream-without-downstream: no
206
207	# Maximum segment size (MSS) of TCP socket on which the server
208	# responds to queries. Default is 0, system default MSS.
209	# tcp-mss: 0
210
211	# Maximum segment size (MSS) of TCP socket for outgoing queries.
212	# Default is 0, system default MSS.
213	# outgoing-tcp-mss: 0
214
215	# Use systemd socket activation for UDP, TCP, and control sockets.
216	# use-systemd: no
217
218	# Detach from the terminal, run in background, "yes" or "no".
219	# Set the value to "no" when unbound runs as systemd service.
220	# do-daemonize: yes
221
222	# control which clients are allowed to make (recursive) queries
223	# to this server. Specify classless netblocks with /size and action.
224	# By default everything is refused, except for localhost.
225	# Choose deny (drop message), refuse (polite error reply),
226	# allow (recursive ok), allow_setrd (recursive ok, rd bit is forced on),
227	# allow_snoop (recursive and nonrecursive ok)
228	# deny_non_local (drop queries unless can be answered from local-data)
229	# refuse_non_local (like deny_non_local but polite error reply).
230	# access-control: 0.0.0.0/0 refuse
231	# access-control: 127.0.0.0/8 allow
232	# access-control: ::0/0 refuse
233	# access-control: ::1 allow
234	# access-control: ::ffff:127.0.0.1 allow
235
236	# tag access-control with list of tags (in "" with spaces between)
237	# Clients using this access control element use localzones that
238	# are tagged with one of these tags.
239	# access-control-tag: 192.0.2.0/24 "tag2 tag3"
240
241	# set action for particular tag for given access control element
242	# if you have multiple tag values, the tag used to lookup the action
243	# is the first tag match between access-control-tag and local-zone-tag
244	# where "first" comes from the order of the define-tag values.
245	# access-control-tag-action: 192.0.2.0/24 tag3 refuse
246
247	# set redirect data for particular tag for access control element
248	# access-control-tag-data: 192.0.2.0/24 tag2 "A 127.0.0.1"
249
250	# Set view for access control element
251	# access-control-view: 192.0.2.0/24 viewname
252
253	# if given, a chroot(2) is done to the given directory.
254	# i.e. you can chroot to the working directory, for example,
255	# for extra security, but make sure all files are in that directory.
256	#
257	# If chroot is enabled, you should pass the configfile (from the
258	# commandline) as a full path from the original root. After the
259	# chroot has been performed the now defunct portion of the config
260	# file path is removed to be able to reread the config after a reload.
261	#
262	# All other file paths (working dir, logfile, roothints, and
263	# key files) can be specified in several ways:
264	# 	o as an absolute path relative to the new root.
265	# 	o as a relative path to the working directory.
266	# 	o as an absolute path relative to the original root.
267	# In the last case the path is adjusted to remove the unused portion.
268	#
269	# The pid file can be absolute and outside of the chroot, it is
270	# written just prior to performing the chroot and dropping permissions.
271	#
272	# Additionally, unbound may need to access /dev/random (for entropy).
273	# How to do this is specific to your OS.
274	#
275	# If you give "" no chroot is performed. The path must not end in a /.
276	# chroot: "@UNBOUND_CHROOT_DIR@"
277
278	# if given, user privileges are dropped (after binding port),
279	# and the given username is assumed. Default is user "unbound".
280	# If you give "" no privileges are dropped.
281	# username: "@UNBOUND_USERNAME@"
282
283	# the working directory. The relative files in this config are
284	# relative to this directory. If you give "" the working directory
285	# is not changed.
286	# If you give a server: directory: dir before include: file statements
287	# then those includes can be relative to the working directory.
288	# directory: "@UNBOUND_RUN_DIR@"
289
290	# the log file, "" means log to stderr.
291	# Use of this option sets use-syslog to "no".
292	# logfile: ""
293
294	# Log to syslog(3) if yes. The log facility LOG_DAEMON is used to
295	# log to. If yes, it overrides the logfile.
296	# use-syslog: yes
297
298	# Log identity to report. if empty, defaults to the name of argv[0]
299	# (usually "unbound").
300	# log-identity: ""
301
302	# print UTC timestamp in ascii to logfile, default is epoch in seconds.
303	# log-time-ascii: no
304
305	# print one line with time, IP, name, type, class for every query.
306	# log-queries: no
307
308	# print one line per reply, with time, IP, name, type, class, rcode,
309	# timetoresolve, fromcache and responsesize.
310	# log-replies: no
311
312	# the pid file. Can be an absolute path outside of chroot/work dir.
313	# pidfile: "@UNBOUND_PIDFILE@"
314
315	# file to read root hints from.
316	# get one from https://www.internic.net/domain/named.cache
317	# root-hints: ""
318
319	# enable to not answer id.server and hostname.bind queries.
320	# hide-identity: no
321
322	# enable to not answer version.server and version.bind queries.
323	# hide-version: no
324
325	# enable to not answer trustanchor.unbound queries.
326	# hide-trustanchor: no
327
328	# the identity to report. Leave "" or default to return hostname.
329	# identity: ""
330
331	# the version to report. Leave "" or default to return package version.
332	# version: ""
333
334	# the target fetch policy.
335	# series of integers describing the policy per dependency depth.
336	# The number of values in the list determines the maximum dependency
337	# depth the recursor will pursue before giving up. Each integer means:
338	# 	-1 : fetch all targets opportunistically,
339	# 	0: fetch on demand,
340	#	positive value: fetch that many targets opportunistically.
341	# Enclose the list of numbers between quotes ("").
342	# target-fetch-policy: "3 2 1 0 0"
343
344	# Harden against very small EDNS buffer sizes.
345	# harden-short-bufsize: no
346
347	# Harden against unseemly large queries.
348	# harden-large-queries: no
349
350	# Harden against out of zone rrsets, to avoid spoofing attempts.
351	# harden-glue: yes
352
353	# Harden against receiving dnssec-stripped data. If you turn it
354	# off, failing to validate dnskey data for a trustanchor will
355	# trigger insecure mode for that zone (like without a trustanchor).
356	# Default on, which insists on dnssec data for trust-anchored zones.
357	# harden-dnssec-stripped: yes
358
359	# Harden against queries that fall under dnssec-signed nxdomain names.
360	# harden-below-nxdomain: no
361
362	# Harden the referral path by performing additional queries for
363	# infrastructure data.  Validates the replies (if possible).
364	# Default off, because the lookups burden the server.  Experimental
365	# implementation of draft-wijngaards-dnsext-resolver-side-mitigation.
366	# harden-referral-path: no
367
368	# Harden against algorithm downgrade when multiple algorithms are
369	# advertised in the DS record.  If no, allows the weakest algorithm
370	# to validate the zone.
371	# harden-algo-downgrade: no
372
373	# Sent minimum amount of information to upstream servers to enhance
374	# privacy. Only sent minimum required labels of the QNAME and set QTYPE
375	# to A when possible.
376	# qname-minimisation: yes
377
378	# QNAME minimisation in strict mode. Do not fall-back to sending full
379	# QNAME to potentially broken nameservers. A lot of domains will not be
380	# resolvable when this option in enabled.
381	# This option only has effect when qname-minimisation is enabled.
382	# qname-minimisation-strict: no
383
384	# Aggressive NSEC uses the DNSSEC NSEC chain to synthesize NXDOMAIN
385	# and other denials, using information from previous NXDOMAINs answers.
386	# aggressive-nsec: no
387
388	# Use 0x20-encoded random bits in the query to foil spoof attempts.
389	# This feature is an experimental implementation of draft dns-0x20.
390	# use-caps-for-id: no
391
392	# Domains (and domains in them) without support for dns-0x20 and
393	# the fallback fails because they keep sending different answers.
394	# caps-whitelist: "licdn.com"
395	# caps-whitelist: "senderbase.org"
396
397	# Enforce privacy of these addresses. Strips them away from answers.
398	# It may cause DNSSEC validation to additionally mark it as bogus.
399	# Protects against 'DNS Rebinding' (uses browser as network proxy).
400	# Only 'private-domain' and 'local-data' names are allowed to have
401	# these private addresses. No default.
402	# private-address: 10.0.0.0/8
403	# private-address: 172.16.0.0/12
404	# private-address: 192.168.0.0/16
405	# private-address: 169.254.0.0/16
406	# private-address: fd00::/8
407	# private-address: fe80::/10
408	# private-address: ::ffff:0:0/96
409
410	# Allow the domain (and its subdomains) to contain private addresses.
411	# local-data statements are allowed to contain private addresses too.
412	# private-domain: "example.com"
413
414	# If nonzero, unwanted replies are not only reported in statistics,
415	# but also a running total is kept per thread. If it reaches the
416	# threshold, a warning is printed and a defensive action is taken,
417	# the cache is cleared to flush potential poison out of it.
418	# A suggested value is 10000000, the default is 0 (turned off).
419	# unwanted-reply-threshold: 0
420
421	# Do not query the following addresses. No DNS queries are sent there.
422	# List one address per entry. List classless netblocks with /size,
423	# do-not-query-address: 127.0.0.1/8
424	# do-not-query-address: ::1
425
426	# if yes, the above default do-not-query-address entries are present.
427	# if no, localhost can be queried (for testing and debugging).
428	# do-not-query-localhost: yes
429
430	# if yes, perform prefetching of almost expired message cache entries.
431	# prefetch: no
432
433	# if yes, perform key lookups adjacent to normal lookups.
434	# prefetch-key: no
435
436	# if yes, Unbound rotates RRSet order in response.
437	# rrset-roundrobin: no
438
439	# if yes, Unbound doesn't insert authority/additional sections
440	# into response messages when those sections are not required.
441	# minimal-responses: no
442
443	# true to disable DNSSEC lameness check in iterator.
444	# disable-dnssec-lame-check: no
445
446	# module configuration of the server. A string with identifiers
447	# separated by spaces. Syntax: "[dns64] [validator] iterator"
448	# module-config: "validator iterator"
449
450	# File with trusted keys, kept uptodate using RFC5011 probes,
451	# initial file like trust-anchor-file, then it stores metadata.
452	# Use several entries, one per domain name, to track multiple zones.
453	#
454	# If you want to perform DNSSEC validation, run unbound-anchor before
455	# you start unbound (i.e. in the system boot scripts).  And enable:
456	# Please note usage of unbound-anchor root anchor is at your own risk
457	# and under the terms of our LICENSE (see that file in the source).
458	# auto-trust-anchor-file: "@UNBOUND_ROOTKEY_FILE@"
459
460	# trust anchor signaling sends a RFC8145 key tag query after priming.
461	# trust-anchor-signaling: yes
462	
463	# Root key trust anchor sentinel (draft-ietf-dnsop-kskroll-sentinel)
464	# root-key-sentinel: yes
465
466	# File with DLV trusted keys. Same format as trust-anchor-file.
467	# There can be only one DLV configured, it is trusted from root down.
468	# DLV is going to be decommissioned.  Please do not use it any more.
469	# dlv-anchor-file: "dlv.isc.org.key"
470
471	# File with trusted keys for validation. Specify more than one file
472	# with several entries, one file per entry.
473	# Zone file format, with DS and DNSKEY entries.
474	# Note this gets out of date, use auto-trust-anchor-file please.
475	# trust-anchor-file: ""
476
477	# Trusted key for validation. DS or DNSKEY. specify the RR on a
478	# single line, surrounded by "". TTL is ignored. class is IN default.
479	# Note this gets out of date, use auto-trust-anchor-file please.
480	# (These examples are from August 2007 and may not be valid anymore).
481	# trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2BiVmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy32DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ=="
482	# trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A0BA4D17FA9B038BE4A"
483
484	# File with trusted keys for validation. Specify more than one file
485	# with several entries, one file per entry. Like trust-anchor-file
486	# but has a different file format. Format is BIND-9 style format,
487	# the trusted-keys { name flag proto algo "key"; }; clauses are read.
488	# you need external update procedures to track changes in keys.
489	# trusted-keys-file: ""
490
491	# Ignore chain of trust. Domain is treated as insecure.
492	# domain-insecure: "example.com"
493
494	# Override the date for validation with a specific fixed date.
495	# Do not set this unless you are debugging signature inception
496	# and expiration. "" or "0" turns the feature off. -1 ignores date.
497	# val-override-date: ""
498
499	# The time to live for bogus data, rrsets and messages. This avoids
500	# some of the revalidation, until the time interval expires. in secs.
501	# val-bogus-ttl: 60
502
503	# The signature inception and expiration dates are allowed to be off
504	# by 10% of the signature lifetime (expir-incep) from our local clock.
505	# This leeway is capped with a minimum and a maximum.  In seconds.
506	# val-sig-skew-min: 3600
507	# val-sig-skew-max: 86400
508
509	# Should additional section of secure message also be kept clean of
510	# unsecure data. Useful to shield the users of this validator from
511	# potential bogus data in the additional section. All unsigned data
512	# in the additional section is removed from secure messages.
513	# val-clean-additional: yes
514
515	# Turn permissive mode on to permit bogus messages. Thus, messages
516	# for which security checks failed will be returned to clients,
517	# instead of SERVFAIL. It still performs the security checks, which
518	# result in interesting log files and possibly the AD bit in
519	# replies if the message is found secure. The default is off.
520	# val-permissive-mode: no
521
522	# Ignore the CD flag in incoming queries and refuse them bogus data.
523	# Enable it if the only clients of unbound are legacy servers (w2008)
524	# that set CD but cannot validate themselves.
525	# ignore-cd-flag: no
526
527	# Serve expired responses from cache, with TTL 0 in the response,
528	# and then attempt to fetch the data afresh.
529	# serve-expired: no
530
531	# Have the validator log failed validations for your diagnosis.
532	# 0: off. 1: A line per failed user query. 2: With reason and bad IP.
533	# val-log-level: 0
534
535	# It is possible to configure NSEC3 maximum iteration counts per
536	# keysize. Keep this table very short, as linear search is done.
537	# A message with an NSEC3 with larger count is marked insecure.
538	# List in ascending order the keysize and count values.
539	# val-nsec3-keysize-iterations: "1024 150 2048 500 4096 2500"
540
541	# instruct the auto-trust-anchor-file probing to add anchors after ttl.
542	# add-holddown: 2592000 # 30 days
543
544	# instruct the auto-trust-anchor-file probing to del anchors after ttl.
545	# del-holddown: 2592000 # 30 days
546
547	# auto-trust-anchor-file probing removes missing anchors after ttl.
548	# If the value 0 is given, missing anchors are not removed.
549	# keep-missing: 31622400 # 366 days
550
551	# debug option that allows very small holddown times for key rollover,
552	# otherwise the RFC mandates probe intervals must be at least 1 hour.
553	# permit-small-holddown: no
554
555	# the amount of memory to use for the key cache.
556	# plain value in bytes or you can append k, m or G. default is "4Mb".
557	# key-cache-size: 4m
558
559	# the number of slabs to use for the key cache.
560	# the number of slabs must be a power of 2.
561	# more slabs reduce lock contention, but fragment memory usage.
562	# key-cache-slabs: 4
563
564	# the amount of memory to use for the negative cache (used for DLV).
565	# plain value in bytes or you can append k, m or G. default is "1Mb".
566	# neg-cache-size: 1m
567
568	# By default, for a number of zones a small default 'nothing here'
569	# reply is built-in.  Query traffic is thus blocked.  If you
570	# wish to serve such zone you can unblock them by uncommenting one
571	# of the nodefault statements below.
572	# You may also have to use domain-insecure: zone to make DNSSEC work,
573	# unless you have your own trust anchors for this zone.
574	# local-zone: "localhost." nodefault
575	# local-zone: "127.in-addr.arpa." nodefault
576	# local-zone: "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa." nodefault
577	# local-zone: "onion." nodefault
578	# local-zone: "test." nodefault
579	# local-zone: "invalid." nodefault
580	# local-zone: "10.in-addr.arpa." nodefault
581	# local-zone: "16.172.in-addr.arpa." nodefault
582	# local-zone: "17.172.in-addr.arpa." nodefault
583	# local-zone: "18.172.in-addr.arpa." nodefault
584	# local-zone: "19.172.in-addr.arpa." nodefault
585	# local-zone: "20.172.in-addr.arpa." nodefault
586	# local-zone: "21.172.in-addr.arpa." nodefault
587	# local-zone: "22.172.in-addr.arpa." nodefault
588	# local-zone: "23.172.in-addr.arpa." nodefault
589	# local-zone: "24.172.in-addr.arpa." nodefault
590	# local-zone: "25.172.in-addr.arpa." nodefault
591	# local-zone: "26.172.in-addr.arpa." nodefault
592	# local-zone: "27.172.in-addr.arpa." nodefault
593	# local-zone: "28.172.in-addr.arpa." nodefault
594	# local-zone: "29.172.in-addr.arpa." nodefault
595	# local-zone: "30.172.in-addr.arpa." nodefault
596	# local-zone: "31.172.in-addr.arpa." nodefault
597	# local-zone: "168.192.in-addr.arpa." nodefault
598	# local-zone: "0.in-addr.arpa." nodefault
599	# local-zone: "254.169.in-addr.arpa." nodefault
600	# local-zone: "2.0.192.in-addr.arpa." nodefault
601	# local-zone: "100.51.198.in-addr.arpa." nodefault
602	# local-zone: "113.0.203.in-addr.arpa." nodefault
603	# local-zone: "255.255.255.255.in-addr.arpa." nodefault
604	# local-zone: "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa." nodefault
605	# local-zone: "d.f.ip6.arpa." nodefault
606	# local-zone: "8.e.f.ip6.arpa." nodefault
607	# local-zone: "9.e.f.ip6.arpa." nodefault
608	# local-zone: "a.e.f.ip6.arpa." nodefault
609	# local-zone: "b.e.f.ip6.arpa." nodefault
610	# local-zone: "8.b.d.0.1.0.0.2.ip6.arpa." nodefault
611	# And for 64.100.in-addr.arpa. to 127.100.in-addr.arpa.
612
613	# If unbound is running service for the local host then it is useful
614	# to perform lan-wide lookups to the upstream, and unblock the
615	# long list of local-zones above.  If this unbound is a dns server
616	# for a network of computers, disabled is better and stops information
617	# leakage of local lan information.
618	# unblock-lan-zones: no
619
620	# The insecure-lan-zones option disables validation for
621	# these zones, as if they were all listed as domain-insecure.
622	# insecure-lan-zones: no
623
624	# a number of locally served zones can be configured.
625	# 	local-zone: <zone> <type>
626	# 	local-data: "<resource record string>"
627	# o deny serves local data (if any), else, drops queries.
628	# o refuse serves local data (if any), else, replies with error.
629	# o static serves local data, else, nxdomain or nodata answer.
630	# o transparent gives local data, but resolves normally for other names
631	# o redirect serves the zone data for any subdomain in the zone.
632	# o nodefault can be used to normally resolve AS112 zones.
633	# o typetransparent resolves normally for other types and other names
634	# o inform acts like transparent, but logs client IP address
635	# o inform_deny drops queries and logs client IP address
636	# o always_transparent, always_refuse, always_nxdomain, resolve in
637	#   that way but ignore local data for that name
638	# o noview breaks out of that view towards global local-zones.
639	#
640	# defaults are localhost address, reverse for 127.0.0.1 and ::1
641	# and nxdomain for AS112 zones. If you configure one of these zones
642	# the default content is omitted, or you can omit it with 'nodefault'.
643	#
644	# If you configure local-data without specifying local-zone, by
645	# default a transparent local-zone is created for the data.
646	#
647	# You can add locally served data with
648	# local-zone: "local." static
649	# local-data: "mycomputer.local. IN A 192.0.2.51"
650	# local-data: 'mytext.local TXT "content of text record"'
651	#
652	# You can override certain queries with
653	# local-data: "adserver.example.com A 127.0.0.1"
654	#
655	# You can redirect a domain to a fixed address with
656	# (this makes example.com, www.example.com, etc, all go to 192.0.2.3)
657	# local-zone: "example.com" redirect
658	# local-data: "example.com A 192.0.2.3"
659	#
660	# Shorthand to make PTR records, "IPv4 name" or "IPv6 name".
661	# You can also add PTR records using local-data directly, but then
662	# you need to do the reverse notation yourself.
663	# local-data-ptr: "192.0.2.3 www.example.com"
664
665	# tag a localzone with a list of tag names (in "" with spaces between)
666	# local-zone-tag: "example.com" "tag2 tag3"
667
668	# add a netblock specific override to a localzone, with zone type
669	# local-zone-override: "example.com" 192.0.2.0/24 refuse
670
671	# service clients over TLS (on the TCP sockets), with plain DNS inside
672	# the TLS stream.  Give the certificate to use and private key.
673	# default is "" (disabled).  requires restart to take effect.
674	# tls-service-key: "path/to/privatekeyfile.key"
675	# tls-service-pem: "path/to/publiccertfile.pem"
676	# tls-port: 853
677
678	# request upstream over TLS (with plain DNS inside the TLS stream).
679	# Default is no.  Can be turned on and off with unbound-control.
680	# tls-upstream: no
681
682	# Certificates used to authenticate connections made upstream.
683	# tls-cert-bundle: ""
684
685	# Add system certs to the cert bundle, from the Windows Cert Store
686	# tls-win-cert: no
687
688	# Also serve tls on these port numbers (eg. 443, ...), by listing
689	# tls-additional-port: portno for each of the port numbers.
690
691	# DNS64 prefix. Must be specified when DNS64 is use.
692	# Enable dns64 in module-config.  Used to synthesize IPv6 from IPv4.
693	# dns64-prefix: 64:ff9b::0/96
694
695	# ratelimit for uncached, new queries, this limits recursion effort.
696	# ratelimiting is experimental, and may help against randomqueryflood.
697	# if 0(default) it is disabled, otherwise state qps allowed per zone.
698	# ratelimit: 0
699
700	# ratelimits are tracked in a cache, size in bytes of cache (or k,m).
701	# ratelimit-size: 4m
702	# ratelimit cache slabs, reduces lock contention if equal to cpucount.
703	# ratelimit-slabs: 4
704
705	# 0 blocks when ratelimited, otherwise let 1/xth traffic through
706	# ratelimit-factor: 10
707
708	# override the ratelimit for a specific domain name.
709	# give this setting multiple times to have multiple overrides.
710	# ratelimit-for-domain: example.com 1000
711	# override the ratelimits for all domains below a domain name
712	# can give this multiple times, the name closest to the zone is used.
713	# ratelimit-below-domain: com 1000
714
715	# global query ratelimit for all ip addresses.
716	# feature is experimental.
717	# if 0(default) it is disabled, otherwise states qps allowed per ip address
718	# ip-ratelimit: 0
719
720	# ip ratelimits are tracked in a cache, size in bytes of cache (or k,m).
721	# ip-ratelimit-size: 4m
722	# ip ratelimit cache slabs, reduces lock contention if equal to cpucount.
723	# ip-ratelimit-slabs: 4
724
725	# 0 blocks when ip is ratelimited, otherwise let 1/xth traffic through
726	# ip-ratelimit-factor: 10
727
728	# what is considered a low rtt (ping time for upstream server), in msec
729	# low-rtt: 45
730	# select low rtt this many times out of 1000. 0 means the fast server
731	# select is disabled.  prefetches are not sped up.
732	# low-rtt-permil: 0
733
734	# Specific options for ipsecmod. unbound needs to be configured with
735	# --enable-ipsecmod for these to take effect.
736	#
737	# Enable or disable ipsecmod (it still needs to be defined in
738	# module-config above). Can be used when ipsecmod needs to be
739	# enabled/disabled via remote-control(below).
740	# ipsecmod-enabled: yes
741	#
742	# Path to executable external hook. It must be defined when ipsecmod is
743	# listed in module-config (above).
744	# ipsecmod-hook: "./my_executable"
745	#
746	# When enabled unbound will reply with SERVFAIL if the return value of
747	# the ipsecmod-hook is not 0.
748	# ipsecmod-strict: no
749	#
750	# Maximum time to live (TTL) for cached A/AAAA records with IPSECKEY.
751	# ipsecmod-max-ttl: 3600
752	#
753	# Reply with A/AAAA even if the relevant IPSECKEY is bogus. Mainly used for
754	# testing.
755	# ipsecmod-ignore-bogus: no
756	#
757	# Domains for which ipsecmod will be triggered. If not defined (default)
758	# all domains are treated as being whitelisted.
759	# ipsecmod-whitelist: "example.com"
760	# ipsecmod-whitelist: "nlnetlabs.nl"
761
762
763# Python config section. To enable:
764# o use --with-pythonmodule to configure before compiling.
765# o list python in the module-config string (above) to enable.
766# o and give a python-script to run.
767python:
768	# Script file to load
769	# python-script: "@UNBOUND_SHARE_DIR@/ubmodule-tst.py"
770
771# Remote control config section.
772remote-control:
773	# Enable remote control with unbound-control(8) here.
774	# set up the keys and certificates with unbound-control-setup.
775	# control-enable: no
776
777	# what interfaces are listened to for remote control.
778	# give 0.0.0.0 and ::0 to listen to all interfaces.
779	# set to an absolute path to use a unix local name pipe, certificates
780	# are not used for that, so key and cert files need not be present.
781	# control-interface: 127.0.0.1
782	# control-interface: ::1
783
784	# port number for remote control operations.
785	# control-port: 8953
786
787	# for localhost, you can disable use of TLS by setting this to "no"
788	# For local sockets this option is ignored, and TLS is not used.
789	# control-use-cert: "yes"
790
791	# unbound server key file.
792	# server-key-file: "@UNBOUND_RUN_DIR@/unbound_server.key"
793
794	# unbound server certificate file.
795	# server-cert-file: "@UNBOUND_RUN_DIR@/unbound_server.pem"
796
797	# unbound-control key file.
798	# control-key-file: "@UNBOUND_RUN_DIR@/unbound_control.key"
799
800	# unbound-control certificate file.
801	# control-cert-file: "@UNBOUND_RUN_DIR@/unbound_control.pem"
802
803# Stub zones.
804# Create entries like below, to make all queries for 'example.com' and
805# 'example.org' go to the given list of nameservers. list zero or more
806# nameservers by hostname or by ipaddress. If you set stub-prime to yes,
807# the list is treated as priming hints (default is no).
808# With stub-first yes, it attempts without the stub if it fails.
809# Consider adding domain-insecure: name and local-zone: name nodefault
810# to the server: section if the stub is a locally served zone.
811# stub-zone:
812#	name: "example.com"
813#	stub-addr: 192.0.2.68
814#	stub-prime: no
815#	stub-first: no
816#	stub-tls-upstream: no
817# stub-zone:
818#	name: "example.org"
819#	stub-host: ns.example.com.
820
821# Forward zones
822# Create entries like below, to make all queries for 'example.com' and
823# 'example.org' go to the given list of servers. These servers have to handle
824# recursion to other nameservers. List zero or more nameservers by hostname
825# or by ipaddress. Use an entry with name "." to forward all queries.
826# If you enable forward-first, it attempts without the forward if it fails.
827# forward-zone:
828# 	name: "example.com"
829# 	forward-addr: 192.0.2.68
830# 	forward-addr: 192.0.2.73@5355  # forward to port 5355.
831# 	forward-first: no
832# 	forward-tls-upstream: no
833# forward-zone:
834# 	name: "example.org"
835# 	forward-host: fwd.example.com
836
837# Authority zones
838# The data for these zones is kept locally, from a file or downloaded.
839# The data can be served to downstream clients, or used instead of the
840# upstream (which saves a lookup to the upstream).  The first example
841# has a copy of the root for local usage.  The second serves example.org
842# authoritatively.  zonefile: reads from file (and writes to it if you also
843# download it), master: fetches with AXFR and IXFR, or url to zonefile.
844# With allow-notify: you can give additional (apart from masters) sources of
845# notifies.
846# auth-zone:
847#	name: "."
848#	for-downstream: no
849#	for-upstream: yes
850#	fallback-enabled: yes
851#	master: b.root-servers.net
852#	master: c.root-servers.net
853#	master: e.root-servers.net
854#	master: f.root-servers.net
855#	master: g.root-servers.net
856#	master: k.root-servers.net
857# auth-zone:
858#	name: "example.org"
859#	for-downstream: yes
860#	for-upstream: yes
861#	zonefile: "example.org.zone"
862
863# Views
864# Create named views. Name must be unique. Map views to requests using
865# the access-control-view option. Views can contain zero or more local-zone
866# and local-data options. Options from matching views will override global
867# options. Global options will be used if no matching view is found.
868# With view-first yes, it will try to answer using the global local-zone and
869# local-data elements if there is no view specific match.
870# view:
871#	name: "viewname"
872#	local-zone: "example.com" redirect
873#	local-data: "example.com A 192.0.2.3"
874#	local-data-ptr: "192.0.2.3 www.example.com"
875#	view-first: no
876# view:
877#	name: "anotherview"
878#	local-zone: "example.com" refuse
879
880# DNSCrypt
881# Caveats:
882# 1. the keys/certs cannot be produced by unbound. You can use dnscrypt-wrapper
883#   for this: https://github.com/cofyc/dnscrypt-wrapper/blob/master/README.md#usage
884# 2. dnscrypt channel attaches to an interface. you MUST set interfaces to
885#   listen on `dnscrypt-port` with the follo0wing snippet:
886# server:
887#     interface: 0.0.0.0@443
888#     interface: ::0@443
889#
890# Finally, `dnscrypt` config has its own section.
891# dnscrypt:
892#     dnscrypt-enable: yes
893#     dnscrypt-port: 443
894#     dnscrypt-provider: 2.dnscrypt-cert.example.com.
895#     dnscrypt-secret-key: /path/unbound-conf/keys1/1.key
896#     dnscrypt-secret-key: /path/unbound-conf/keys2/1.key
897#     dnscrypt-provider-cert: /path/unbound-conf/keys1/1.cert
898#     dnscrypt-provider-cert: /path/unbound-conf/keys2/1.cert
899
900# CacheDB
901# Enable external backend DB as auxiliary cache.  Specify the backend name
902# (default is "testframe", which has no use other than for debugging and
903# testing) and backend-specific options.  The 'cachedb' module must be
904# included in module-config.
905# cachedb:
906#     backend: "testframe"
907#     # secret seed string to calculate hashed keys
908#     secret-seed: "default"
909#
910#     # For "redis" backend:
911#     # redis server's IP address or host name
912#     redis-server-host: 127.0.0.1
913#     # redis server's TCP port
914#     redis-server-port: 6379
915#     # timeout (in ms) for communication with the redis server
916#     redis-timeout: 100
917