xref: /freebsd/contrib/unbound/doc/example.conf.in (revision 5036d9652a5701d00e9e40ea942c278e9f77d33d)
1#
2# Example configuration file.
3#
4# See unbound.conf(5) man page, version 1.22.0.
5#
6# this is a comment.
7
8# Use this anywhere in the file to include other text into this file.
9#include: "otherfile.conf"
10
11# Use this anywhere in the file to include other text, that explicitly starts a
12# clause, into this file. Text after this directive needs to start a clause.
13#include-toplevel: "otherfile.conf"
14
15# The server clause sets the main parameters.
16server:
17	# whitespace is not necessary, but looks cleaner.
18
19	# verbosity number, 0 is least verbose. 1 is default.
20	# verbosity: 1
21
22	# print statistics to the log (for every thread) every N seconds.
23	# Set to "" or 0 to disable. Default is disabled.
24	# statistics-interval: 0
25
26	# enable shm for stats, default no.  if you enable also enable
27	# statistics-interval, every time it also writes stats to the
28	# shared memory segment keyed with shm-key.
29	# shm-enable: no
30
31	# shm for stats uses this key, and key+1 for the shared mem segment.
32	# shm-key: 11777
33
34	# enable cumulative statistics, without clearing them after printing.
35	# statistics-cumulative: no
36
37	# enable extended statistics (query types, answer codes, status)
38	# printed from unbound-control. Default off, because of speed.
39	# extended-statistics: no
40
41	# Inhibits selected extended statistics (qtype, qclass, qopcode, rcode,
42	# rpz-actions) from printing if their value is 0.
43	# Default on.
44	# statistics-inhibit-zero: yes
45
46	# number of threads to create. 1 disables threading.
47	# num-threads: 1
48
49	# specify the interfaces to answer queries from by ip-address.
50	# The default is to listen to localhost (127.0.0.1 and ::1).
51	# specify 0.0.0.0 and ::0 to bind to all available interfaces.
52	# specify every interface[@port] on a new 'interface:' labelled line.
53	# The listen interfaces are not changed on reload, only on restart.
54	# interface: 192.0.2.153
55	# interface: 192.0.2.154
56	# interface: 192.0.2.154@5003
57	# interface: 2001:DB8::5
58	# interface: eth0@5003
59
60	# enable this feature to copy the source address of queries to reply.
61	# Socket options are not supported on all platforms. experimental.
62	# interface-automatic: no
63
64	# instead of the default port, open additional ports separated by
65	# spaces when interface-automatic is enabled, by listing them here.
66	# interface-automatic-ports: ""
67
68	# port to answer queries from
69	# port: 53
70
71	# specify the interfaces to send outgoing queries to authoritative
72	# server from by ip-address. If none, the default (all) interface
73	# is used. Specify every interface on a 'outgoing-interface:' line.
74	# outgoing-interface: 192.0.2.153
75	# outgoing-interface: 2001:DB8::5
76	# outgoing-interface: 2001:DB8::6
77
78	# Specify a netblock to use remainder 64 bits as random bits for
79	# upstream queries.  Uses freebind option (Linux).
80	# outgoing-interface: 2001:DB8::/64
81	# Also (Linux:) ip -6 addr add 2001:db8::/64 dev lo
82	# And: ip -6 route add local 2001:db8::/64 dev lo
83	# And set prefer-ip6: yes to use the ip6 randomness from a netblock.
84	# Set this to yes to prefer ipv6 upstream servers over ipv4.
85	# prefer-ip6: no
86
87	# Prefer ipv4 upstream servers, even if ipv6 is available.
88	# prefer-ip4: no
89
90	# number of ports to allocate per thread, determines the size of the
91	# port range that can be open simultaneously.  About double the
92	# num-queries-per-thread, or, use as many as the OS will allow you.
93	# outgoing-range: 4096
94
95	# permit Unbound to use this port number or port range for
96	# making outgoing queries, using an outgoing interface.
97	# outgoing-port-permit: 32768
98
99	# deny Unbound the use this of port number or port range for
100	# making outgoing queries, using an outgoing interface.
101	# Use this to make sure Unbound does not grab a UDP port that some
102	# other server on this computer needs. The default is to avoid
103	# IANA-assigned port numbers.
104	# If multiple outgoing-port-permit and outgoing-port-avoid options
105	# are present, they are processed in order.
106	# outgoing-port-avoid: "3200-3208"
107
108	# number of outgoing simultaneous tcp buffers to hold per thread.
109	# outgoing-num-tcp: 10
110
111	# number of incoming simultaneous tcp buffers to hold per thread.
112	# incoming-num-tcp: 10
113
114	# buffer size for UDP port 53 incoming (SO_RCVBUF socket option).
115	# 0 is system default.  Use 4m to catch query spikes for busy servers.
116	# so-rcvbuf: 0
117
118	# buffer size for UDP port 53 outgoing (SO_SNDBUF socket option).
119	# 0 is system default.  Use 4m to handle spikes on very busy servers.
120	# so-sndbuf: 0
121
122	# use SO_REUSEPORT to distribute queries over threads.
123	# at extreme load it could be better to turn it off to distribute even.
124	# so-reuseport: yes
125
126	# use IP_TRANSPARENT so the interface: addresses can be non-local
127	# and you can config non-existing IPs that are going to work later on
128	# (uses IP_BINDANY on FreeBSD).
129	# ip-transparent: no
130
131	# use IP_FREEBIND so the interface: addresses can be non-local
132	# and you can bind to nonexisting IPs and interfaces that are down.
133	# Linux only.  On Linux you also have ip-transparent that is similar.
134	# ip-freebind: no
135
136	# the value of the Differentiated Services Codepoint (DSCP)
137	# in the differentiated services field (DS) of the outgoing
138	# IP packets
139	# ip-dscp: 0
140
141	# EDNS reassembly buffer to advertise to UDP peers (the actual buffer
142	# is set with msg-buffer-size).
143	# edns-buffer-size: 1232
144
145	# Maximum UDP response size (not applied to TCP response).
146	# Suggested values are 512 to 4096. Default is 1232. 65536 disables it.
147	# max-udp-size: 1232
148
149	# max memory to use for stream(tcp and tls) waiting result buffers.
150	# stream-wait-size: 4m
151
152	# buffer size for handling DNS data. No messages larger than this
153	# size can be sent or received, by UDP or TCP. In bytes.
154	# msg-buffer-size: 65552
155
156	# the amount of memory to use for the message cache.
157	# plain value in bytes or you can append k, m or G. default is "4Mb".
158	# msg-cache-size: 4m
159
160	# the number of slabs to use for the message cache.
161	# the number of slabs must be a power of 2.
162	# more slabs reduce lock contention, but fragment memory usage.
163	# msg-cache-slabs: 4
164
165	# the number of queries that a thread gets to service.
166	# num-queries-per-thread: 1024
167
168	# if very busy, 50% queries run to completion, 50% get timeout in msec
169	# jostle-timeout: 200
170
171	# msec to wait before close of port on timeout UDP. 0 disables.
172	# delay-close: 0
173
174	# perform connect for UDP sockets to mitigate ICMP side channel.
175	# udp-connect: yes
176
177	# The number of retries, per upstream nameserver in a delegation, when
178	# a throwaway response (also timeouts) is received.
179	# outbound-msg-retry: 5
180
181	# Hard limit on the number of outgoing queries Unbound will make while
182	# resolving a name, making sure large NS sets do not loop.
183	# It resets on query restarts (e.g., CNAME) and referrals.
184	# max-sent-count: 32
185
186	# Hard limit on the number of times Unbound is allowed to restart a
187	# query upon encountering a CNAME record.
188	# max-query-restarts: 11
189
190	# Limit on number of NS records in NS RRset for incoming packets.
191	# iter-scrub-ns: 20
192
193	# Limit on number of CNAME, DNAME records for incoming packets.
194	# iter-scrub-cname: 11
195
196	# Limit on upstream queries for an incoming query and its recursion.
197	# max-global-quota: 128
198
199	# msec for waiting for an unknown server to reply.  Increase if you
200	# are behind a slow satellite link, to eg. 1128.
201	# unknown-server-time-limit: 376
202
203	# msec before recursion replies are dropped. The work item continues.
204	# discard-timeout: 1900
205
206	# Max number of replies waiting for recursion per IP address.
207	# wait-limit: 1000
208
209	# Max replies waiting for recursion for IP address with cookie.
210	# wait-limit-cookie: 10000
211
212	# Apart from the default, the wait limit can be set for a netblock.
213	# wait-limit-netblock: 192.0.2.0/24 50000
214
215	# Apart from the default, the wait limit with cookie can be adjusted.
216	# wait-limit-cookie-netblock: 192.0.2.0/24 50000
217
218	# the amount of memory to use for the RRset cache.
219	# plain value in bytes or you can append k, m or G. default is "4Mb".
220	# rrset-cache-size: 4m
221
222	# the number of slabs to use for the RRset cache.
223	# the number of slabs must be a power of 2.
224	# more slabs reduce lock contention, but fragment memory usage.
225	# rrset-cache-slabs: 4
226
227	# the time to live (TTL) value lower bound, in seconds. Default 0.
228	# If more than an hour could easily give trouble due to stale data.
229	# cache-min-ttl: 0
230
231	# the time to live (TTL) value cap for RRsets and messages in the
232	# cache. Items are not cached for longer. In seconds.
233	# cache-max-ttl: 86400
234
235	# the time to live (TTL) value cap for negative responses in the cache
236	# cache-max-negative-ttl: 3600
237
238	# the time to live (TTL) value lower bound, in seconds. Default 0.
239	# For negative responses in the cache. If disabled, default,
240	# cache-min-ttl applies if configured.
241	# cache-min-negative-ttl: 0
242
243	# the time to live (TTL) value for cached roundtrip times, lameness and
244	# EDNS version information for hosts. In seconds.
245	# infra-host-ttl: 900
246
247	# minimum wait time for responses, increase if uplink is long. In msec.
248	# infra-cache-min-rtt: 50
249
250	# maximum wait time for responses. In msec.
251	# infra-cache-max-rtt: 120000
252
253	# enable to make server probe down hosts more frequently.
254	# infra-keep-probing: no
255
256	# the number of slabs to use for the Infrastructure cache.
257	# the number of slabs must be a power of 2.
258	# more slabs reduce lock contention, but fragment memory usage.
259	# infra-cache-slabs: 4
260
261	# the maximum number of hosts that are cached (roundtrip, EDNS, lame).
262	# infra-cache-numhosts: 10000
263
264	# define a number of tags here, use with local-zone, access-control,
265	# interface-*.
266	# repeat the define-tag statement to add additional tags.
267	# define-tag: "tag1 tag2 tag3"
268
269	# Enable IPv4, "yes" or "no".
270	# do-ip4: yes
271
272	# Enable IPv6, "yes" or "no".
273	# do-ip6: yes
274
275	# If running unbound on an IPv6-only host, domains that only have
276	# IPv4 servers would become unresolveable.  If NAT64 is available in
277	# the network, unbound can use NAT64 to reach these servers with
278	# the following option.  This is NOT needed for enabling DNS64 on a
279	# system that has IPv4 connectivity.
280	# Consider also enabling prefer-ip6 to prefer native IPv6 connections
281	# to nameservers.
282	# do-nat64: no
283
284	# NAT64 prefix.  Defaults to using dns64-prefix value.
285	# nat64-prefix: 64:ff9b::0/96
286
287	# Enable UDP, "yes" or "no".
288	# do-udp: yes
289
290	# Enable TCP, "yes" or "no".
291	# do-tcp: yes
292
293	# upstream connections use TCP only (and no UDP), "yes" or "no"
294	# useful for tunneling scenarios, default no.
295	# tcp-upstream: no
296
297	# upstream connections also use UDP (even if do-udp is no).
298	# useful if if you want UDP upstream, but don't provide UDP downstream.
299	# udp-upstream-without-downstream: no
300
301	# Maximum segment size (MSS) of TCP socket on which the server
302	# responds to queries. Default is 0, system default MSS.
303	# tcp-mss: 0
304
305	# Maximum segment size (MSS) of TCP socket for outgoing queries.
306	# Default is 0, system default MSS.
307	# outgoing-tcp-mss: 0
308
309	# Idle TCP timeout, connection closed in milliseconds
310	# tcp-idle-timeout: 30000
311
312	# Enable EDNS TCP keepalive option.
313	# edns-tcp-keepalive: no
314
315	# Timeout for EDNS TCP keepalive, in msec. Overrides tcp-idle-timeout
316	# if edns-tcp-keepalive is set.
317	# edns-tcp-keepalive-timeout: 120000
318
319	# UDP queries that have waited in the socket buffer for a long time
320	# can be dropped. Default is 0, disabled. In seconds, such as 3.
321	# sock-queue-timeout: 0
322
323	# Use systemd socket activation for UDP, TCP, and control sockets.
324	# use-systemd: no
325
326	# Detach from the terminal, run in background, "yes" or "no".
327	# Set the value to "no" when Unbound runs as systemd service.
328	# do-daemonize: yes
329
330	# control which clients are allowed to make (recursive) queries
331	# to this server. Specify classless netblocks with /size and action.
332	# By default everything is refused, except for localhost.
333	# Choose deny (drop message), refuse (polite error reply),
334	# allow (recursive ok), allow_setrd (recursive ok, rd bit is forced on),
335	# allow_snoop (recursive and nonrecursive ok)
336	# allow_cookie (allow UDP with valid cookie or stateful transport)
337	# deny_non_local (drop queries unless can be answered from local-data)
338	# refuse_non_local (like deny_non_local but polite error reply).
339	# access-control: 127.0.0.0/8 allow
340	# access-control: ::1 allow
341	# access-control: ::ffff:127.0.0.1 allow
342
343	# tag access-control with list of tags (in "" with spaces between)
344	# Clients using this access control element use localzones that
345	# are tagged with one of these tags.
346	# access-control-tag: 192.0.2.0/24 "tag2 tag3"
347
348	# set action for particular tag for given access control element.
349	# if you have multiple tag values, the tag used to lookup the action
350	# is the first tag match between access-control-tag and local-zone-tag
351	# where "first" comes from the order of the define-tag values.
352	# access-control-tag-action: 192.0.2.0/24 tag3 refuse
353
354	# set redirect data for particular tag for access control element
355	# access-control-tag-data: 192.0.2.0/24 tag2 "A 127.0.0.1"
356
357	# Set view for access control element
358	# access-control-view: 192.0.2.0/24 viewname
359
360	# Similar to 'access-control:' but for interfaces.
361	# Control which listening interfaces are allowed to accept (recursive)
362	# queries for this server.
363	# The specified interfaces should be the same as the ones specified in
364	# 'interface:' followed by the action.
365	# The actions are the same as 'access-control:' above.
366	# By default all the interfaces configured are refused.
367	# Note: any 'access-control*:' setting overrides all 'interface-*:'
368	# settings for targeted clients.
369	# interface-action: 192.0.2.153 allow
370	# interface-action: 192.0.2.154 allow
371	# interface-action: 192.0.2.154@5003 allow
372	# interface-action: 2001:DB8::5 allow
373	# interface-action: eth0@5003 allow
374
375	# Similar to 'access-control-tag:' but for interfaces.
376	# Tag interfaces with a list of tags (in "" with spaces between).
377	# Interfaces using these tags use localzones that are tagged with one
378	# of these tags.
379	# The specified interfaces should be the same as the ones specified in
380	# 'interface:' followed by the list of tags.
381	# Note: any 'access-control*:' setting overrides all 'interface-*:'
382	# settings for targeted clients.
383	# interface-tag: eth0@5003 "tag2 tag3"
384
385	# Similar to 'access-control-tag-action:' but for interfaces.
386	# Set action for particular tag for a given interface element.
387	# If you have multiple tag values, the tag used to lookup the action
388	# is the first tag match between interface-tag and local-zone-tag
389	# where "first" comes from the order of the define-tag values.
390	# The specified interfaces should be the same as the ones specified in
391	# 'interface:' followed by the tag and action.
392	# Note: any 'access-control*:' setting overrides all 'interface-*:'
393	# settings for targeted clients.
394	# interface-tag-action: eth0@5003 tag3 refuse
395
396	# Similar to 'access-control-tag-data:' but for interfaces.
397	# Set redirect data for a particular tag for an interface element.
398	# The specified interfaces should be the same as the ones specified in
399	# 'interface:' followed by the tag and the redirect data.
400	# Note: any 'access-control*:' setting overrides all 'interface-*:'
401	# settings for targeted clients.
402	# interface-tag-data: eth0@5003 tag2 "A 127.0.0.1"
403
404	# Similar to 'access-control-view:' but for interfaces.
405	# Set view for an interface element.
406	# The specified interfaces should be the same as the ones specified in
407	# 'interface:' followed by the view name.
408	# Note: any 'access-control*:' setting overrides all 'interface-*:'
409	# settings for targeted clients.
410	# interface-view: eth0@5003 viewname
411
412	# if given, a chroot(2) is done to the given directory.
413	# i.e. you can chroot to the working directory, for example,
414	# for extra security, but make sure all files are in that directory.
415	#
416	# If chroot is enabled, you should pass the configfile (from the
417	# commandline) as a full path from the original root. After the
418	# chroot has been performed the now defunct portion of the config
419	# file path is removed to be able to reread the config after a reload.
420	#
421	# All other file paths (working dir, logfile, roothints, and
422	# key files) can be specified in several ways:
423	# 	o as an absolute path relative to the new root.
424	# 	o as a relative path to the working directory.
425	# 	o as an absolute path relative to the original root.
426	# In the last case the path is adjusted to remove the unused portion.
427	#
428	# The pid file can be absolute and outside of the chroot, it is
429	# written just prior to performing the chroot and dropping permissions.
430	#
431	# Additionally, Unbound may need to access /dev/urandom (for entropy).
432	# How to do this is specific to your OS.
433	#
434	# If you give "" no chroot is performed. The path must not end in a /.
435	# chroot: "@UNBOUND_CHROOT_DIR@"
436
437	# if given, user privileges are dropped (after binding port),
438	# and the given username is assumed. Default is user "unbound".
439	# If you give "" no privileges are dropped.
440	# username: "@UNBOUND_USERNAME@"
441
442	# the working directory. The relative files in this config are
443	# relative to this directory. If you give "" the working directory
444	# is not changed.
445	# If you give a server: directory: dir before include: file statements
446	# then those includes can be relative to the working directory.
447	# directory: "@UNBOUND_RUN_DIR@"
448
449	# the log file, "" means log to stderr.
450	# Use of this option sets use-syslog to "no".
451	# logfile: ""
452
453	# Log to syslog(3) if yes. The log facility LOG_DAEMON is used to
454	# log to. If yes, it overrides the logfile.
455	# use-syslog: yes
456
457	# Log identity to report. if empty, defaults to the name of argv[0]
458	# (usually "unbound").
459	# log-identity: ""
460
461	# print UTC timestamp in ascii to logfile, default is epoch in seconds.
462	# log-time-ascii: no
463
464	# log timestamp in ISO8601 format if also log-time-ascii is enabled.
465	# (y-m-dTh:m:s.msec[+-]tzhours:tzminutes)
466	# log-time-iso: no
467
468	# print one line with time, IP, name, type, class for every query.
469	# log-queries: no
470
471	# print one line per reply, with time, IP, name, type, class, rcode,
472	# timetoresolve, fromcache and responsesize.
473	# log-replies: no
474
475	# log with tag 'query' and 'reply' instead of 'info' for
476	# filtering log-queries and log-replies from the log.
477	# log-tag-queryreply: no
478
479	# log with destination address, port and type for log-replies.
480	# log-destaddr: no
481
482	# log the local-zone actions, like local-zone type inform is enabled
483	# also for the other local zone types.
484	# log-local-actions: no
485
486	# print log lines that say why queries return SERVFAIL to clients.
487	# log-servfail: no
488
489	# the pid file. Can be an absolute path outside of chroot/work dir.
490	# pidfile: "@UNBOUND_PIDFILE@"
491
492	# file to read root hints from.
493	# get one from https://www.internic.net/domain/named.cache
494	# root-hints: ""
495
496	# enable to not answer id.server and hostname.bind queries.
497	# hide-identity: no
498
499	# enable to not answer version.server and version.bind queries.
500	# hide-version: no
501
502	# enable to not answer trustanchor.unbound queries.
503	# hide-trustanchor: no
504
505	# enable to not set the User-Agent HTTP header.
506	# hide-http-user-agent: no
507
508	# the identity to report. Leave "" or default to return hostname.
509	# identity: ""
510
511	# the version to report. Leave "" or default to return package version.
512	# version: ""
513
514	# NSID identity (hex string, or "ascii_somestring"). default disabled.
515	# nsid: "aabbccdd"
516
517	# User-Agent HTTP header to use. Leave "" or default to use package name
518	# and version.
519	# http-user-agent: ""
520
521	# the target fetch policy.
522	# series of integers describing the policy per dependency depth.
523	# The number of values in the list determines the maximum dependency
524	# depth the recursor will pursue before giving up. Each integer means:
525	# 	-1 : fetch all targets opportunistically,
526	# 	0: fetch on demand,
527	#	positive value: fetch that many targets opportunistically.
528	# Enclose the list of numbers between quotes ("").
529	# target-fetch-policy: "3 2 1 0 0"
530
531	# Harden against very small EDNS buffer sizes.
532	# harden-short-bufsize: yes
533
534	# Harden against unseemly large queries.
535	# harden-large-queries: no
536
537	# Harden against out of zone rrsets, to avoid spoofing attempts.
538	# harden-glue: yes
539
540	# Harden against unverified (outside-zone, including sibling zone) glue rrsets
541	# harden-unverified-glue: no
542
543	# Harden against receiving dnssec-stripped data. If you turn it
544	# off, failing to validate dnskey data for a trustanchor will
545	# trigger insecure mode for that zone (like without a trustanchor).
546	# Default on, which insists on dnssec data for trust-anchored zones.
547	# harden-dnssec-stripped: yes
548
549	# Harden against queries that fall under dnssec-signed nxdomain names.
550	# harden-below-nxdomain: yes
551
552	# Harden the referral path by performing additional queries for
553	# infrastructure data.  Validates the replies (if possible).
554	# Default off, because the lookups burden the server.  Experimental
555	# implementation of draft-wijngaards-dnsext-resolver-side-mitigation.
556	# harden-referral-path: no
557
558	# Harden against algorithm downgrade when multiple algorithms are
559	# advertised in the DS record.  If no, allows the weakest algorithm
560	# to validate the zone.
561	# harden-algo-downgrade: no
562
563	# Harden against unknown records in the authority section and the
564	# additional section.
565	# harden-unknown-additional: no
566
567	# Sent minimum amount of information to upstream servers to enhance
568	# privacy. Only sent minimum required labels of the QNAME and set QTYPE
569	# to A when possible.
570	# qname-minimisation: yes
571
572	# QNAME minimisation in strict mode. Do not fall-back to sending full
573	# QNAME to potentially broken nameservers. A lot of domains will not be
574	# resolvable when this option in enabled.
575	# This option only has effect when qname-minimisation is enabled.
576	# qname-minimisation-strict: no
577
578	# Aggressive NSEC uses the DNSSEC NSEC chain to synthesize NXDOMAIN
579	# and other denials, using information from previous NXDOMAINs answers.
580	# aggressive-nsec: yes
581
582	# Use 0x20-encoded random bits in the query to foil spoof attempts.
583	# This feature is an experimental implementation of draft dns-0x20.
584	# use-caps-for-id: no
585
586	# Domains (and domains in them) without support for dns-0x20 and
587	# the fallback fails because they keep sending different answers.
588	# caps-exempt: "licdn.com"
589	# caps-exempt: "senderbase.org"
590
591	# Enforce privacy of these addresses. Strips them away from answers.
592	# It may cause DNSSEC validation to additionally mark it as bogus.
593	# Protects against 'DNS Rebinding' (uses browser as network proxy).
594	# Only 'private-domain' and 'local-data' names are allowed to have
595	# these private addresses. No default.
596	# private-address: 10.0.0.0/8
597	# private-address: 172.16.0.0/12
598	# private-address: 192.168.0.0/16
599	# private-address: 169.254.0.0/16
600	# private-address: fd00::/8
601	# private-address: fe80::/10
602	# private-address: ::ffff:0:0/96
603
604	# Allow the domain (and its subdomains) to contain private addresses.
605	# local-data statements are allowed to contain private addresses too.
606	# private-domain: "example.com"
607
608	# If nonzero, unwanted replies are not only reported in statistics,
609	# but also a running total is kept per thread. If it reaches the
610	# threshold, a warning is printed and a defensive action is taken,
611	# the cache is cleared to flush potential poison out of it.
612	# A suggested value is 10000000, the default is 0 (turned off).
613	# unwanted-reply-threshold: 0
614
615	# Do not query the following addresses. No DNS queries are sent there.
616	# List one address per entry. List classless netblocks with /size,
617	# do-not-query-address: 127.0.0.1/8
618	# do-not-query-address: ::1
619
620	# if yes, the above default do-not-query-address entries are present.
621	# if no, localhost can be queried (for testing and debugging).
622	# do-not-query-localhost: yes
623
624	# if yes, perform prefetching of almost expired message cache entries.
625	# prefetch: no
626
627	# if yes, perform key lookups adjacent to normal lookups.
628	# prefetch-key: no
629
630	# deny queries of type ANY with an empty response.
631	# deny-any: no
632
633	# if yes, Unbound rotates RRSet order in response.
634	# rrset-roundrobin: yes
635
636	# if yes, Unbound doesn't insert authority/additional sections
637	# into response messages when those sections are not required.
638	# minimal-responses: yes
639
640	# true to disable DNSSEC lameness check in iterator.
641	# disable-dnssec-lame-check: no
642
643	# module configuration of the server. A string with identifiers
644	# separated by spaces. Syntax: "[dns64] [validator] iterator"
645	# most modules have to be listed at the beginning of the line,
646	# except cachedb(just before iterator), and python (at the beginning,
647	# or, just before the iterator).
648	# module-config: "validator iterator"
649
650	# File with trusted keys, kept uptodate using RFC5011 probes,
651	# initial file like trust-anchor-file, then it stores metadata.
652	# Use several entries, one per domain name, to track multiple zones.
653	#
654	# If you want to perform DNSSEC validation, run unbound-anchor before
655	# you start Unbound (i.e. in the system boot scripts).
656	# And then enable the auto-trust-anchor-file config item.
657	# Please note usage of unbound-anchor root anchor is at your own risk
658	# and under the terms of our LICENSE (see that file in the source).
659	# auto-trust-anchor-file: "@UNBOUND_ROOTKEY_FILE@"
660
661	# trust anchor signaling sends a RFC8145 key tag query after priming.
662	# trust-anchor-signaling: yes
663
664	# Root key trust anchor sentinel (draft-ietf-dnsop-kskroll-sentinel)
665	# root-key-sentinel: yes
666
667	# File with trusted keys for validation. Specify more than one file
668	# with several entries, one file per entry.
669	# Zone file format, with DS and DNSKEY entries.
670	# Note this gets out of date, use auto-trust-anchor-file please.
671	# trust-anchor-file: ""
672
673	# Trusted key for validation. DS or DNSKEY. specify the RR on a
674	# single line, surrounded by "". TTL is ignored. class is IN default.
675	# Note this gets out of date, use auto-trust-anchor-file please.
676	# (These examples are from August 2007 and may not be valid anymore).
677	# trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2BiVmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy32DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ=="
678	# trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A0BA4D17FA9B038BE4A"
679
680	# File with trusted keys for validation. Specify more than one file
681	# with several entries, one file per entry. Like trust-anchor-file
682	# but has a different file format. Format is BIND-9 style format,
683	# the trusted-keys { name flag proto algo "key"; }; clauses are read.
684	# you need external update procedures to track changes in keys.
685	# trusted-keys-file: ""
686
687	# Ignore chain of trust. Domain is treated as insecure.
688	# domain-insecure: "example.com"
689
690	# Override the date for validation with a specific fixed date.
691	# Do not set this unless you are debugging signature inception
692	# and expiration. "" or "0" turns the feature off. -1 ignores date.
693	# val-override-date: ""
694
695	# The time to live for bogus data, rrsets and messages. This avoids
696	# some of the revalidation, until the time interval expires. in secs.
697	# val-bogus-ttl: 60
698
699	# The signature inception and expiration dates are allowed to be off
700	# by 10% of the signature lifetime (expir-incep) from our local clock.
701	# This leeway is capped with a minimum and a maximum.  In seconds.
702	# val-sig-skew-min: 3600
703	# val-sig-skew-max: 86400
704
705	# The maximum number the validator should restart validation with
706	# another authority in case of failed validation.
707	# val-max-restart: 5
708
709	# Should additional section of secure message also be kept clean of
710	# unsecure data. Useful to shield the users of this validator from
711	# potential bogus data in the additional section. All unsigned data
712	# in the additional section is removed from secure messages.
713	# val-clean-additional: yes
714
715	# Turn permissive mode on to permit bogus messages. Thus, messages
716	# for which security checks failed will be returned to clients,
717	# instead of SERVFAIL. It still performs the security checks, which
718	# result in interesting log files and possibly the AD bit in
719	# replies if the message is found secure. The default is off.
720	# val-permissive-mode: no
721
722	# Ignore the CD flag in incoming queries and refuse them bogus data.
723	# Enable it if the only clients of Unbound are legacy servers (w2008)
724	# that set CD but cannot validate themselves.
725	# ignore-cd-flag: no
726
727	# Disable the DO flag in outgoing requests. It is helpful for upstream
728	# devices that cannot handle DNSSEC information. But do not enable it
729	# otherwise, because it would stop DNSSEC validation.
730	# disable-edns-do: no
731
732	# Serve expired responses from cache, with serve-expired-reply-ttl in
733	# the response, and then attempt to fetch the data afresh.
734	# serve-expired: no
735	#
736	# Limit serving of expired responses to configured seconds after
737	# expiration. 0 disables the limit.
738	# serve-expired-ttl: 0
739	#
740	# Set the TTL of expired records to the serve-expired-ttl value after a
741	# failed attempt to retrieve the record from upstream. This makes sure
742	# that the expired records will be served as long as there are queries
743	# for it.
744	# serve-expired-ttl-reset: no
745	#
746	# TTL value to use when replying with expired data.
747	# serve-expired-reply-ttl: 30
748	#
749	# Time in milliseconds before replying to the client with expired data.
750	# This essentially enables the serve-stale behavior as specified in
751	# RFC 8767 that first tries to resolve before
752	# immediately responding with expired data.  0 disables this behavior.
753	# A recommended value is 1800.
754	# serve-expired-client-timeout: 0
755
756	# Return the original TTL as received from the upstream name server rather
757	# than the decrementing TTL as stored in the cache.  Enabling this feature
758	# does not impact cache expiry, it only changes the TTL Unbound embeds in
759	# responses to queries. Note that enabling this feature implicitly disables
760	# enforcement of the configured minimum and maximum TTL.
761	# serve-original-ttl: no
762
763	# Have the validator log failed validations for your diagnosis.
764	# 0: off. 1: A line per failed user query. 2: With reason and bad IP.
765	# val-log-level: 0
766
767	# It is possible to configure NSEC3 maximum iteration counts per
768	# keysize. Keep this table very short, as linear search is done.
769	# A message with an NSEC3 with larger count is marked insecure.
770	# List in ascending order the keysize and count values.
771	# val-nsec3-keysize-iterations: "1024 150 2048 150 4096 150"
772
773	# if enabled, ZONEMD verification failures do not block the zone.
774	# zonemd-permissive-mode: no
775
776	# instruct the auto-trust-anchor-file probing to add anchors after ttl.
777	# add-holddown: 2592000 # 30 days
778
779	# instruct the auto-trust-anchor-file probing to del anchors after ttl.
780	# del-holddown: 2592000 # 30 days
781
782	# auto-trust-anchor-file probing removes missing anchors after ttl.
783	# If the value 0 is given, missing anchors are not removed.
784	# keep-missing: 31622400 # 366 days
785
786	# debug option that allows very small holddown times for key rollover,
787	# otherwise the RFC mandates probe intervals must be at least 1 hour.
788	# permit-small-holddown: no
789
790	# the amount of memory to use for the key cache.
791	# plain value in bytes or you can append k, m or G. default is "4Mb".
792	# key-cache-size: 4m
793
794	# the number of slabs to use for the key cache.
795	# the number of slabs must be a power of 2.
796	# more slabs reduce lock contention, but fragment memory usage.
797	# key-cache-slabs: 4
798
799	# the amount of memory to use for the negative cache.
800	# plain value in bytes or you can append k, m or G. default is "1Mb".
801	# neg-cache-size: 1m
802
803	# By default, for a number of zones a small default 'nothing here'
804	# reply is built-in.  Query traffic is thus blocked.  If you
805	# wish to serve such zone you can unblock them by uncommenting one
806	# of the nodefault statements below.
807	# You may also have to use domain-insecure: zone to make DNSSEC work,
808	# unless you have your own trust anchors for this zone.
809	# local-zone: "localhost." nodefault
810	# local-zone: "127.in-addr.arpa." nodefault
811	# 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
812	# local-zone: "home.arpa." nodefault
813	# local-zone: "onion." nodefault
814	# local-zone: "test." nodefault
815	# local-zone: "invalid." nodefault
816	# local-zone: "10.in-addr.arpa." nodefault
817	# local-zone: "16.172.in-addr.arpa." nodefault
818	# local-zone: "17.172.in-addr.arpa." nodefault
819	# local-zone: "18.172.in-addr.arpa." nodefault
820	# local-zone: "19.172.in-addr.arpa." nodefault
821	# local-zone: "20.172.in-addr.arpa." nodefault
822	# local-zone: "21.172.in-addr.arpa." nodefault
823	# local-zone: "22.172.in-addr.arpa." nodefault
824	# local-zone: "23.172.in-addr.arpa." nodefault
825	# local-zone: "24.172.in-addr.arpa." nodefault
826	# local-zone: "25.172.in-addr.arpa." nodefault
827	# local-zone: "26.172.in-addr.arpa." nodefault
828	# local-zone: "27.172.in-addr.arpa." nodefault
829	# local-zone: "28.172.in-addr.arpa." nodefault
830	# local-zone: "29.172.in-addr.arpa." nodefault
831	# local-zone: "30.172.in-addr.arpa." nodefault
832	# local-zone: "31.172.in-addr.arpa." nodefault
833	# local-zone: "168.192.in-addr.arpa." nodefault
834	# local-zone: "0.in-addr.arpa." nodefault
835	# local-zone: "254.169.in-addr.arpa." nodefault
836	# local-zone: "2.0.192.in-addr.arpa." nodefault
837	# local-zone: "100.51.198.in-addr.arpa." nodefault
838	# local-zone: "113.0.203.in-addr.arpa." nodefault
839	# local-zone: "255.255.255.255.in-addr.arpa." nodefault
840	# 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
841	# local-zone: "d.f.ip6.arpa." nodefault
842	# local-zone: "8.e.f.ip6.arpa." nodefault
843	# local-zone: "9.e.f.ip6.arpa." nodefault
844	# local-zone: "a.e.f.ip6.arpa." nodefault
845	# local-zone: "b.e.f.ip6.arpa." nodefault
846	# local-zone: "8.b.d.0.1.0.0.2.ip6.arpa." nodefault
847	# And for 64.100.in-addr.arpa. to 127.100.in-addr.arpa.
848
849	# Add example.com into ipset
850	# local-zone: "example.com" ipset
851
852	# If Unbound is running service for the local host then it is useful
853	# to perform lan-wide lookups to the upstream, and unblock the
854	# long list of local-zones above.  If this Unbound is a dns server
855	# for a network of computers, disabled is better and stops information
856	# leakage of local lan information.
857	# unblock-lan-zones: no
858
859	# The insecure-lan-zones option disables validation for
860	# these zones, as if they were all listed as domain-insecure.
861	# insecure-lan-zones: no
862
863	# a number of locally served zones can be configured.
864	# 	local-zone: <zone> <type>
865	# 	local-data: "<resource record string>"
866	# o deny serves local data (if any), else, drops queries.
867	# o refuse serves local data (if any), else, replies with error.
868	# o static serves local data, else, nxdomain or nodata answer.
869	# o transparent gives local data, but resolves normally for other names
870	# o redirect serves the zone data for any subdomain in the zone.
871	# o nodefault can be used to normally resolve AS112 zones.
872	# o typetransparent resolves normally for other types and other names
873	# o inform acts like transparent, but logs client IP address
874	# o inform_deny drops queries and logs client IP address
875	# o inform_redirect redirects queries and logs client IP address
876	# o always_transparent, always_refuse, always_nxdomain, always_nodata,
877	#   always_deny resolve in that way but ignore local data for
878	#   that name
879	# o block_a resolves all records normally but returns
880	#   NODATA for A queries and ignores local data for that name
881	# o always_null returns 0.0.0.0 or ::0 for any name in the zone.
882	# o noview breaks out of that view towards global local-zones.
883	#
884	# defaults are localhost address, reverse for 127.0.0.1 and ::1
885	# and nxdomain for AS112 zones. If you configure one of these zones
886	# the default content is omitted, or you can omit it with 'nodefault'.
887	#
888	# If you configure local-data without specifying local-zone, by
889	# default a transparent local-zone is created for the data.
890	#
891	# You can add locally served data with
892	# local-zone: "local." static
893	# local-data: "mycomputer.local. IN A 192.0.2.51"
894	# local-data: 'mytext.local TXT "content of text record"'
895	#
896	# You can override certain queries with
897	# local-data: "adserver.example.com A 127.0.0.1"
898	#
899	# You can redirect a domain to a fixed address with
900	# (this makes example.com, www.example.com, etc, all go to 192.0.2.3)
901	# local-zone: "example.com" redirect
902	# local-data: "example.com A 192.0.2.3"
903	#
904	# Shorthand to make PTR records, "IPv4 name" or "IPv6 name".
905	# You can also add PTR records using local-data directly, but then
906	# you need to do the reverse notation yourself.
907	# local-data-ptr: "192.0.2.3 www.example.com"
908
909	# tag a localzone with a list of tag names (in "" with spaces between)
910	# local-zone-tag: "example.com" "tag2 tag3"
911
912	# add a netblock specific override to a localzone, with zone type
913	# local-zone-override: "example.com" 192.0.2.0/24 refuse
914
915	# service clients over TLS (on the TCP sockets) with plain DNS inside
916	# the TLS stream, and over HTTPS using HTTP/2 as specified in RFC8484.
917	# Give the certificate to use and private key.
918	# default is "" (disabled).  requires restart to take effect.
919	# tls-service-key: "path/to/privatekeyfile.key"
920	# tls-service-pem: "path/to/publiccertfile.pem"
921	# tls-port: 853
922	# https-port: 443
923	# quic-port: 853
924
925	# cipher setting for TLSv1.2
926	# tls-ciphers: "DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256"
927	# cipher setting for TLSv1.3
928	# tls-ciphersuites: "TLS_AES_128_GCM_SHA256:TLS_AES_128_CCM_8_SHA256:TLS_AES_128_CCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256"
929
930	# Pad responses to padded queries received over TLS
931	# pad-responses: yes
932
933	# Padded responses will be padded to the closest multiple of this size.
934	# pad-responses-block-size: 468
935
936	# Use the SNI extension for TLS connections.  Default is yes.
937	# Changing the value requires a reload.
938	# tls-use-sni: yes
939
940	# Add the secret file for TLS Session Ticket.
941	# Secret file must be 80 bytes of random data.
942	# First key use to encrypt and decrypt TLS session tickets.
943	# Other keys use to decrypt only.
944	# requires restart to take effect.
945	# tls-session-ticket-keys: "path/to/secret_file1"
946	# tls-session-ticket-keys: "path/to/secret_file2"
947
948	# request upstream over TLS (with plain DNS inside the TLS stream).
949	# Default is no.  Can be turned on and off with unbound-control.
950	# tls-upstream: no
951
952	# Certificates used to authenticate connections made upstream.
953	# tls-cert-bundle: ""
954
955	# Add system certs to the cert bundle, from the Windows Cert Store
956	# tls-win-cert: no
957	# and on other systems, the default openssl certificates
958	# tls-system-cert: no
959
960	# Pad queries over TLS upstreams
961	# pad-queries: yes
962
963	# Padded queries will be padded to the closest multiple of this size.
964	# pad-queries-block-size: 128
965
966	# Also serve tls on these port numbers (eg. 443, ...), by listing
967	# tls-additional-port: portno for each of the port numbers.
968
969	# HTTP endpoint to provide DNS-over-HTTPS service on.
970	# http-endpoint: "/dns-query"
971
972	# HTTP/2 SETTINGS_MAX_CONCURRENT_STREAMS value to use.
973	# http-max-streams: 100
974
975	# Maximum number of bytes used for all HTTP/2 query buffers.
976	# http-query-buffer-size: 4m
977
978	# Maximum number of bytes used for all HTTP/2 response buffers.
979	# http-response-buffer-size: 4m
980
981	# Set TCP_NODELAY socket option on sockets used for DNS-over-HTTPS
982	# service.
983	# http-nodelay: yes
984
985	# Disable TLS for DNS-over-HTTP downstream service.
986	# http-notls-downstream: no
987
988	# Maximum number of bytes used for QUIC buffers.
989	# quic-size: 8m
990
991	# The interfaces that use these listed port numbers will support and
992	# expect PROXYv2. For UDP and TCP/TLS interfaces.
993	# proxy-protocol-port: portno for each of the port numbers.
994
995	# DNS64 prefix. Must be specified when DNS64 is use.
996	# Enable dns64 in module-config.  Used to synthesize IPv6 from IPv4.
997	# dns64-prefix: 64:ff9b::0/96
998
999	# DNS64 ignore AAAA records for these domains and use A instead.
1000	# dns64-ignore-aaaa: "example.com"
1001
1002	# ratelimit for uncached, new queries, this limits recursion effort.
1003	# ratelimiting is experimental, and may help against randomqueryflood.
1004	# if 0(default) it is disabled, otherwise state qps allowed per zone.
1005	# ratelimit: 0
1006
1007	# ratelimits are tracked in a cache, size in bytes of cache (or k,m).
1008	# ratelimit-size: 4m
1009	# ratelimit cache slabs, reduces lock contention if equal to cpucount.
1010	# ratelimit-slabs: 4
1011
1012	# 0 blocks when ratelimited, otherwise let 1/xth traffic through
1013	# ratelimit-factor: 10
1014
1015	# Aggressive rate limit when the limit is reached and until demand has
1016	# decreased in a 2 second rate window.
1017	# ratelimit-backoff: no
1018
1019	# override the ratelimit for a specific domain name.
1020	# give this setting multiple times to have multiple overrides.
1021	# ratelimit-for-domain: example.com 1000
1022	# override the ratelimits for all domains below a domain name
1023	# can give this multiple times, the name closest to the zone is used.
1024	# ratelimit-below-domain: com 1000
1025
1026	# global query ratelimit for all ip addresses.
1027	# feature is experimental.
1028	# if 0(default) it is disabled, otherwise states qps allowed per ip address
1029	# ip-ratelimit: 0
1030
1031	# global query ratelimit for all ip addresses with a valid DNS Cookie.
1032	# feature is experimental.
1033	# if 0(default) it is disabled, otherwise states qps allowed per ip address
1034	# useful in combination with 'allow_cookie'.
1035	# If used, suggested to be higher than ip-ratelimit, tenfold.
1036	# ip-ratelimit-cookie: 0
1037
1038	# ip ratelimits are tracked in a cache, size in bytes of cache (or k,m).
1039	# ip-ratelimit-size: 4m
1040	# ip ratelimit cache slabs, reduces lock contention if equal to cpucount.
1041	# ip-ratelimit-slabs: 4
1042
1043	# 0 blocks when ip is ratelimited, otherwise let 1/xth traffic through
1044	# ip-ratelimit-factor: 10
1045
1046	# Aggressive rate limit when the limit is reached and until demand has
1047	# decreased in a 2 second rate window.
1048	# ip-ratelimit-backoff: no
1049
1050	# Limit the number of connections simultaneous from a netblock
1051	# tcp-connection-limit: 192.0.2.0/24 12
1052
1053	# select from the fastest servers this many times out of 1000. 0 means
1054	# the fast server select is disabled. prefetches are not sped up.
1055	# fast-server-permil: 0
1056	# the number of servers that will be used in the fast server selection.
1057	# fast-server-num: 3
1058
1059	# reply to requests containing DNS Cookies as specified in RFC 7873 and RFC 9018.
1060	# answer-cookie: no
1061
1062	# secret for DNS Cookie generation.
1063	# useful for anycast deployments.
1064	# example value "000102030405060708090a0b0c0d0e0f".
1065	# cookie-secret: <128 bit random hex string>
1066
1067	# File with cookie secrets, the 'cookie-secret:' option is ignored
1068	# and the file can be managed to have staging and active secrets
1069	# with remote control commands. Disabled with "". Default is "".
1070	# cookie-secret-file: "/usr/local/etc/unbound_cookiesecrets.txt"
1071
1072	# Enable to attach Extended DNS Error codes (RFC8914) to responses.
1073	# ede: no
1074
1075	# Enable to attach an Extended DNS Error (RFC8914) Code 3 - Stale
1076	# Answer as EDNS0 option to expired responses.
1077	# Note that the ede option above needs to be enabled for this to work.
1078	# ede-serve-expired: no
1079
1080	# Specific options for ipsecmod. Unbound needs to be configured with
1081	# --enable-ipsecmod for these to take effect.
1082	#
1083	# Enable or disable ipsecmod (it still needs to be defined in
1084	# module-config above). Can be used when ipsecmod needs to be
1085	# enabled/disabled via remote-control(below).
1086	# ipsecmod-enabled: yes
1087	#
1088	# Path to executable external hook. It must be defined when ipsecmod is
1089	# listed in module-config (above).
1090	# ipsecmod-hook: "./my_executable"
1091	#
1092	# When enabled Unbound will reply with SERVFAIL if the return value of
1093	# the ipsecmod-hook is not 0.
1094	# ipsecmod-strict: no
1095	#
1096	# Maximum time to live (TTL) for cached A/AAAA records with IPSECKEY.
1097	# ipsecmod-max-ttl: 3600
1098	#
1099	# Reply with A/AAAA even if the relevant IPSECKEY is bogus. Mainly used for
1100	# testing.
1101	# ipsecmod-ignore-bogus: no
1102	#
1103	# Domains for which ipsecmod will be triggered. If not defined (default)
1104	# all domains are treated as being allowed.
1105	# ipsecmod-allow: "example.com"
1106	# ipsecmod-allow: "nlnetlabs.nl"
1107
1108	# Timeout for REUSE entries in milliseconds.
1109	# tcp-reuse-timeout: 60000
1110	# Max number of queries on a reuse connection.
1111	# max-reuse-tcp-queries: 200
1112	# Timeout in milliseconds for TCP queries to auth servers.
1113	# tcp-auth-query-timeout: 3000
1114
1115
1116# Python config section. To enable:
1117# o use --with-pythonmodule to configure before compiling.
1118# o list python in the module-config string (above) to enable.
1119#   It can be at the start, it gets validated results, or just before
1120#   the iterator and process before DNSSEC validation.
1121# o and give a python-script to run.
1122python:
1123	# Script file to load
1124	# python-script: "@UNBOUND_SHARE_DIR@/ubmodule-tst.py"
1125
1126# Dynamic library config section. To enable:
1127# o use --with-dynlibmodule to configure before compiling.
1128# o list dynlib in the module-config string (above) to enable.
1129#   It can be placed anywhere, the dynlib module is only a very thin wrapper
1130#   to load modules dynamically.
1131# o and give a dynlib-file to run. If more than one dynlib entry is listed in
1132#   the module-config then you need one dynlib-file per instance.
1133dynlib:
1134	# Script file to load
1135	# dynlib-file: "@UNBOUND_SHARE_DIR@/dynlib.so"
1136
1137# Remote control config section.
1138remote-control:
1139	# Enable remote control with unbound-control(8) here.
1140	# set up the keys and certificates with unbound-control-setup.
1141	# control-enable: no
1142
1143	# what interfaces are listened to for remote control.
1144	# give 0.0.0.0 and ::0 to listen to all interfaces.
1145	# set to an absolute path to use a unix local name pipe, certificates
1146	# are not used for that, so key and cert files need not be present.
1147	# control-interface: 127.0.0.1
1148	# control-interface: ::1
1149
1150	# port number for remote control operations.
1151	# control-port: 8953
1152
1153	# for localhost, you can disable use of TLS by setting this to "no"
1154	# For local sockets this option is ignored, and TLS is not used.
1155	# control-use-cert: "yes"
1156
1157	# Unbound server key file.
1158	# server-key-file: "@UNBOUND_RUN_DIR@/unbound_server.key"
1159
1160	# Unbound server certificate file.
1161	# server-cert-file: "@UNBOUND_RUN_DIR@/unbound_server.pem"
1162
1163	# unbound-control key file.
1164	# control-key-file: "@UNBOUND_RUN_DIR@/unbound_control.key"
1165
1166	# unbound-control certificate file.
1167	# control-cert-file: "@UNBOUND_RUN_DIR@/unbound_control.pem"
1168
1169# Stub zones.
1170# Create entries like below, to make all queries for 'example.com' and
1171# 'example.org' go to the given list of nameservers. list zero or more
1172# nameservers by hostname or by ipaddress. If you set stub-prime to yes,
1173# the list is treated as priming hints (default is no).
1174# With stub-first yes, it attempts without the stub if it fails.
1175# Consider adding domain-insecure: name and local-zone: name nodefault
1176# to the server: section if the stub is a locally served zone.
1177# stub-zone:
1178#	name: "example.com"
1179#	stub-addr: 192.0.2.68
1180#	stub-prime: no
1181#	stub-first: no
1182#	stub-tcp-upstream: no
1183#	stub-tls-upstream: no
1184#	stub-no-cache: no
1185# stub-zone:
1186#	name: "example.org"
1187#	stub-host: ns.example.com.
1188
1189# Forward zones
1190# Create entries like below, to make all queries for 'example.com' and
1191# 'example.org' go to the given list of servers. These servers have to handle
1192# recursion to other nameservers. List zero or more nameservers by hostname
1193# or by ipaddress. Use an entry with name "." to forward all queries.
1194# If you enable forward-first, it attempts without the forward if it fails.
1195# forward-zone:
1196# 	name: "example.com"
1197# 	forward-addr: 192.0.2.68
1198# 	forward-addr: 192.0.2.73@5355  # forward to port 5355.
1199# 	forward-first: no
1200# 	forward-tcp-upstream: no
1201# 	forward-tls-upstream: no
1202#	forward-no-cache: no
1203# forward-zone:
1204# 	name: "example.org"
1205# 	forward-host: fwd.example.com
1206
1207# Authority zones
1208# The data for these zones is kept locally, from a file or downloaded.
1209# The data can be served to downstream clients, or used instead of the
1210# upstream (which saves a lookup to the upstream).  The first example
1211# has a copy of the root for local usage.  The second serves example.org
1212# authoritatively.  zonefile: reads from file (and writes to it if you also
1213# download it), primary: fetches with AXFR and IXFR, or url to zonefile.
1214# With allow-notify: you can give additional (apart from primaries and urls)
1215# sources of notifies.
1216# auth-zone:
1217#	name: "."
1218#	primary: 170.247.170.2        # b.root-servers.net
1219#	primary: 192.33.4.12          # c.root-servers.net
1220#	primary: 199.7.91.13          # d.root-servers.net
1221#	primary: 192.5.5.241          # f.root-servers.net
1222#	primary: 192.112.36.4         # g.root-servers.net
1223#	primary: 193.0.14.129         # k.root-servers.net
1224#	primary: 192.0.47.132         # xfr.cjr.dns.icann.org
1225#	primary: 192.0.32.132         # xfr.lax.dns.icann.org
1226#	primary: 2801:1b8:10::b       # b.root-servers.net
1227#	primary: 2001:500:2::c        # c.root-servers.net
1228#	primary: 2001:500:2d::d       # d.root-servers.net
1229#	primary: 2001:500:2f::f       # f.root-servers.net
1230#	primary: 2001:500:12::d0d     # g.root-servers.net
1231#	primary: 2001:7fd::1          # k.root-servers.net
1232#	primary: 2620:0:2830:202::132 # xfr.cjr.dns.icann.org
1233#	primary: 2620:0:2d0:202::132  # xfr.lax.dns.icann.org
1234#	fallback-enabled: yes
1235#	for-downstream: no
1236#	for-upstream: yes
1237# auth-zone:
1238#	name: "example.org"
1239#	for-downstream: yes
1240#	for-upstream: yes
1241#	zonemd-check: no
1242#	zonemd-reject-absence: no
1243#	zonefile: "example.org.zone"
1244
1245# Views
1246# Create named views. Name must be unique. Map views to requests using
1247# the access-control-view option. Views can contain zero or more local-zone
1248# and local-data options. Options from matching views will override global
1249# options. Global options will be used if no matching view is found.
1250# With view-first yes, it will try to answer using the global local-zone and
1251# local-data elements if there is no view specific match.
1252# view:
1253#	name: "viewname"
1254#	local-zone: "example.com" redirect
1255#	local-data: "example.com A 192.0.2.3"
1256#	local-data-ptr: "192.0.2.3 www.example.com"
1257#	view-first: no
1258# view:
1259#	name: "anotherview"
1260#	local-zone: "example.com" refuse
1261
1262# DNSCrypt
1263# To enable, use --enable-dnscrypt to configure before compiling.
1264# Caveats:
1265# 1. the keys/certs cannot be produced by Unbound. You can use dnscrypt-wrapper
1266#   for this: https://github.com/cofyc/dnscrypt-wrapper/blob/master/README.md#usage
1267# 2. dnscrypt channel attaches to an interface. you MUST set interfaces to
1268#   listen on `dnscrypt-port` with the follo0wing snippet:
1269# server:
1270#     interface: 0.0.0.0@443
1271#     interface: ::0@443
1272#
1273# Finally, `dnscrypt` config has its own section.
1274# dnscrypt:
1275#     dnscrypt-enable: yes
1276#     dnscrypt-port: 443
1277#     dnscrypt-provider: 2.dnscrypt-cert.example.com.
1278#     dnscrypt-secret-key: /path/unbound-conf/keys1/1.key
1279#     dnscrypt-secret-key: /path/unbound-conf/keys2/1.key
1280#     dnscrypt-provider-cert: /path/unbound-conf/keys1/1.cert
1281#     dnscrypt-provider-cert: /path/unbound-conf/keys2/1.cert
1282
1283# CacheDB
1284# External backend DB as auxiliary cache.
1285# To enable, use --enable-cachedb to configure before compiling.
1286# Specify the backend name
1287# (default is "testframe", which has no use other than for debugging and
1288# testing) and backend-specific options.  The 'cachedb' module must be
1289# included in module-config, just before the iterator module.
1290# cachedb:
1291#     backend: "testframe"
1292#     # secret seed string to calculate hashed keys
1293#     secret-seed: "default"
1294#     # if the backend should be read from, but not written to.
1295#     cachedb-no-store: no
1296#     # if the cachedb should be checked before a serve-expired response is
1297#     # given, when serve-expired is enabled.
1298#     cachedb-check-when-serve-expired: yes
1299#
1300#     # For "redis" backend:
1301#     # (to enable, use --with-libhiredis to configure before compiling)
1302#     # redis server's IP address or host name
1303#     redis-server-host: 127.0.0.1
1304#     # redis server's TCP port
1305#     redis-server-port: 6379
1306#     # if the server uses a unix socket, set its path, or "" when not used.
1307#     # redis-server-path: "/var/lib/redis/redis-server.sock"
1308#     # if the server uses an AUTH password, specify here, or "" when not used.
1309#     # redis-server-password: ""
1310#     # timeout (in ms) for communication with the redis server
1311#     redis-timeout: 100
1312#     # timeout (in ms) for commands, if 0, uses redis-timeout.
1313#     redis-command-timeout: 0
1314#     # timeout (in ms) for connection set up, if 0, uses redis-timeout.
1315#     redis-connect-timeout: 0
1316#     # set timeout on redis records based on DNS response TTL
1317#     redis-expire-records: no
1318#     # redis logical database to use, 0 is the default database.
1319#     redis-logical-db: 0
1320
1321# IPSet
1322# Add specify domain into set via ipset.
1323# To enable:
1324# o use --enable-ipset to configure before compiling;
1325# o Unbound then needs to run as root user.
1326# ipset:
1327#     # set name for ip v4 addresses
1328#     name-v4: "list-v4"
1329#     # set name for ip v6 addresses
1330#     name-v6: "list-v6"
1331#
1332
1333# Dnstap logging support, if compiled in by using --enable-dnstap to configure.
1334# To enable, set the dnstap-enable to yes and also some of
1335# dnstap-log-..-messages to yes.  And select an upstream log destination, by
1336# socket path, TCP or TLS destination.
1337# dnstap:
1338# 	dnstap-enable: no
1339# 	# if set to yes frame streams will be used in bidirectional mode
1340# 	dnstap-bidirectional: yes
1341# 	dnstap-socket-path: "@DNSTAP_SOCKET_PATH@"
1342# 	# if "" use the unix socket in dnstap-socket-path, otherwise,
1343# 	# set it to "IPaddress[@port]" of the destination.
1344# 	dnstap-ip: ""
1345# 	# if set to yes if you want to use TLS to dnstap-ip, no for TCP.
1346# 	dnstap-tls: yes
1347# 	# name for authenticating the upstream server. or "" disabled.
1348# 	dnstap-tls-server-name: ""
1349# 	# if "", it uses the cert bundle from the main Unbound config.
1350# 	dnstap-tls-cert-bundle: ""
1351# 	# key file for client authentication, or "" disabled.
1352# 	dnstap-tls-client-key-file: ""
1353# 	# cert file for client authentication, or "" disabled.
1354# 	dnstap-tls-client-cert-file: ""
1355# 	dnstap-send-identity: no
1356# 	dnstap-send-version: no
1357# 	# if "" it uses the hostname.
1358# 	dnstap-identity: ""
1359# 	# if "" it uses the package version.
1360# 	dnstap-version: ""
1361# 	# log only 1/N messages, if 0 it is disabled. default 0.
1362# 	dnstap-sample-rate: 0
1363# 	dnstap-log-resolver-query-messages: no
1364# 	dnstap-log-resolver-response-messages: no
1365# 	dnstap-log-client-query-messages: no
1366# 	dnstap-log-client-response-messages: no
1367# 	dnstap-log-forwarder-query-messages: no
1368# 	dnstap-log-forwarder-response-messages: no
1369
1370# Response Policy Zones
1371# RPZ policies. Applied in order of configuration. Any match from an earlier
1372# RPZ zone will terminate the RPZ lookup. QNAME, Response IP
1373# Address, nsdname, nsip and clientip triggers are supported. Supported
1374# actions are: NXDOMAIN, NODATA, PASSTHRU, DROP, Local Data, tcp-only
1375# and drop.  Policies can be loaded from a file, or using zone
1376# transfer, or using HTTP. The respip module needs to be added
1377# to the module-config, e.g.: module-config: "respip validator iterator".
1378# rpz:
1379#     name: "rpz.example.com"
1380#     zonefile: "rpz.example.com"
1381#     primary: 192.0.2.0
1382#     allow-notify: 192.0.2.0/32
1383#     url: http://www.example.com/rpz.example.org.zone
1384#     rpz-action-override: cname
1385#     rpz-cname-override: www.example.org
1386#     rpz-log: yes
1387#     rpz-log-name: "example policy"
1388#     rpz-signal-nxdomain-ra: no
1389#     for-downstream: no
1390#     tags: "example"
1391