xref: /freebsd/contrib/unbound/doc/example.conf (revision 3fc36ee018bb836bd1796067cf4ef8683f166ebc)
1#
2# Example configuration file.
3#
4# See unbound.conf(5) man page, version 1.5.9.
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 cumulative statistics, without clearing them after printing.
23	# statistics-cumulative: no
24
25	# enable extended statistics (query types, answer codes, status)
26	# printed from unbound-control. default off, because of speed.
27	# extended-statistics: no
28
29	# number of threads to create. 1 disables threading.
30	# num-threads: 1
31
32	# specify the interfaces to answer queries from by ip-address.
33	# The default is to listen to localhost (127.0.0.1 and ::1).
34	# specify 0.0.0.0 and ::0 to bind to all available interfaces.
35	# specify every interface[@port] on a new 'interface:' labelled line.
36	# The listen interfaces are not changed on reload, only on restart.
37	# interface: 192.0.2.153
38	# interface: 192.0.2.154
39	# interface: 192.0.2.154@5003
40	# interface: 2001:DB8::5
41
42	# enable this feature to copy the source address of queries to reply.
43	# Socket options are not supported on all platforms. experimental.
44	# interface-automatic: no
45
46	# port to answer queries from
47	# port: 53
48
49	# specify the interfaces to send outgoing queries to authoritative
50	# server from by ip-address. If none, the default (all) interface
51	# is used. Specify every interface on a 'outgoing-interface:' line.
52	# outgoing-interface: 192.0.2.153
53	# outgoing-interface: 2001:DB8::5
54	# outgoing-interface: 2001:DB8::6
55
56	# number of ports to allocate per thread, determines the size of the
57	# port range that can be open simultaneously.  About double the
58	# num-queries-per-thread, or, use as many as the OS will allow you.
59	# outgoing-range: 4096
60
61	# permit unbound to use this port number or port range for
62	# making outgoing queries, using an outgoing interface.
63	# outgoing-port-permit: 32768
64
65	# deny unbound the use this of port number or port range for
66	# making outgoing queries, using an outgoing interface.
67	# Use this to make sure unbound does not grab a UDP port that some
68	# other server on this computer needs. The default is to avoid
69	# IANA-assigned port numbers.
70	# If multiple outgoing-port-permit and outgoing-port-avoid options
71	# are present, they are processed in order.
72	# outgoing-port-avoid: "3200-3208"
73
74	# number of outgoing simultaneous tcp buffers to hold per thread.
75	# outgoing-num-tcp: 10
76
77	# number of incoming simultaneous tcp buffers to hold per thread.
78	# incoming-num-tcp: 10
79
80	# buffer size for UDP port 53 incoming (SO_RCVBUF socket option).
81	# 0 is system default.  Use 4m to catch query spikes for busy servers.
82	# so-rcvbuf: 0
83
84	# buffer size for UDP port 53 outgoing (SO_SNDBUF socket option).
85	# 0 is system default.  Use 4m to handle spikes on very busy servers.
86	# so-sndbuf: 0
87
88	# use SO_REUSEPORT to distribute queries over threads.
89	# so-reuseport: no
90
91	# use IP_TRANSPARENT so the interface: addresses can be non-local
92	# and you can config non-existing IPs that are going to work later on
93	# (uses IP_BINDANY on FreeBSD).
94	# ip-transparent: no
95
96	# use IP_FREEBIND so the interface: addresses can be non-local
97	# and you can bind to nonexisting IPs and interfaces that are down.
98	# Linux only.  On Linux you also have ip-transparent that is similar.
99	# ip-freebind: no
100
101	# EDNS reassembly buffer to advertise to UDP peers (the actual buffer
102	# is set with msg-buffer-size). 1480 can solve fragmentation (timeouts).
103	# edns-buffer-size: 4096
104
105	# Maximum UDP response size (not applied to TCP response).
106	# Suggested values are 512 to 4096. Default is 4096. 65536 disables it.
107	# max-udp-size: 4096
108
109	# buffer size for handling DNS data. No messages larger than this
110	# size can be sent or received, by UDP or TCP. In bytes.
111	# msg-buffer-size: 65552
112
113	# the amount of memory to use for the message cache.
114	# plain value in bytes or you can append k, m or G. default is "4Mb".
115	# msg-cache-size: 4m
116
117	# the number of slabs to use for the message cache.
118	# the number of slabs must be a power of 2.
119	# more slabs reduce lock contention, but fragment memory usage.
120	# msg-cache-slabs: 4
121
122	# the number of queries that a thread gets to service.
123	# num-queries-per-thread: 1024
124
125	# if very busy, 50% queries run to completion, 50% get timeout in msec
126	# jostle-timeout: 200
127
128	# msec to wait before close of port on timeout UDP. 0 disables.
129	# delay-close: 0
130
131	# the amount of memory to use for the RRset cache.
132	# plain value in bytes or you can append k, m or G. default is "4Mb".
133	# rrset-cache-size: 4m
134
135	# the number of slabs to use for the RRset cache.
136	# the number of slabs must be a power of 2.
137	# more slabs reduce lock contention, but fragment memory usage.
138	# rrset-cache-slabs: 4
139
140	# the time to live (TTL) value lower bound, in seconds. Default 0.
141	# If more than an hour could easily give trouble due to stale data.
142	# cache-min-ttl: 0
143
144	# the time to live (TTL) value cap for RRsets and messages in the
145	# cache. Items are not cached for longer. In seconds.
146	# cache-max-ttl: 86400
147
148	# the time to live (TTL) value cap for negative responses in the cache
149	# cache-max-negative-ttl: 3600
150
151	# the time to live (TTL) value for cached roundtrip times, lameness and
152	# EDNS version information for hosts. In seconds.
153	# infra-host-ttl: 900
154
155	# minimum wait time for responses, increase if uplink is long. In msec.
156	# infra-cache-min-rtt: 50
157
158	# the number of slabs to use for the Infrastructure cache.
159	# the number of slabs must be a power of 2.
160	# more slabs reduce lock contention, but fragment memory usage.
161	# infra-cache-slabs: 4
162
163	# the maximum number of hosts that are cached (roundtrip, EDNS, lame).
164	# infra-cache-numhosts: 10000
165
166	# Enable IPv4, "yes" or "no".
167	# do-ip4: yes
168
169	# Enable IPv6, "yes" or "no".
170	# do-ip6: yes
171
172	# Enable UDP, "yes" or "no".
173	# do-udp: yes
174
175	# Enable TCP, "yes" or "no".
176	# do-tcp: yes
177
178	# upstream connections use TCP only (and no UDP), "yes" or "no"
179	# useful for tunneling scenarios, default no.
180	# tcp-upstream: no
181
182	# Maximum segment size (MSS) of TCP socket on which the server
183	# responds to queries. Default is 0, system default MSS.
184	# tcp-mss: 0
185
186	# Maximum segment size (MSS) of TCP socket for outgoing queries.
187	# Default is 0, system default MSS.
188	# outgoing-tcp-mss: 0
189
190	# Detach from the terminal, run in background, "yes" or "no".
191	# do-daemonize: yes
192
193	# control which clients are allowed to make (recursive) queries
194	# to this server. Specify classless netblocks with /size and action.
195	# By default everything is refused, except for localhost.
196	# Choose deny (drop message), refuse (polite error reply),
197	# allow (recursive ok), allow_snoop (recursive and nonrecursive ok)
198	# deny_non_local (drop queries unless can be answered from local-data)
199	# refuse_non_local (like deny_non_local but polite error reply).
200	# access-control: 0.0.0.0/0 refuse
201	# access-control: 127.0.0.0/8 allow
202	# access-control: ::0/0 refuse
203	# access-control: ::1 allow
204	# access-control: ::ffff:127.0.0.1 allow
205
206	# if given, a chroot(2) is done to the given directory.
207	# i.e. you can chroot to the working directory, for example,
208	# for extra security, but make sure all files are in that directory.
209	#
210	# If chroot is enabled, you should pass the configfile (from the
211	# commandline) as a full path from the original root. After the
212	# chroot has been performed the now defunct portion of the config
213	# file path is removed to be able to reread the config after a reload.
214	#
215	# All other file paths (working dir, logfile, roothints, and
216	# key files) can be specified in several ways:
217	# 	o as an absolute path relative to the new root.
218	# 	o as a relative path to the working directory.
219	# 	o as an absolute path relative to the original root.
220	# In the last case the path is adjusted to remove the unused portion.
221	#
222	# The pid file can be absolute and outside of the chroot, it is
223	# written just prior to performing the chroot and dropping permissions.
224	#
225	# Additionally, unbound may need to access /dev/random (for entropy).
226	# How to do this is specific to your OS.
227	#
228	# If you give "" no chroot is performed. The path must not end in a /.
229	# chroot: "/var/unbound"
230
231	# if given, user privileges are dropped (after binding port),
232	# and the given username is assumed. Default is user "unbound".
233	# If you give "" no privileges are dropped.
234	# username: "unbound"
235
236	# the working directory. The relative files in this config are
237	# relative to this directory. If you give "" the working directory
238	# is not changed.
239	# directory: "/var/unbound"
240
241	# the log file, "" means log to stderr.
242	# Use of this option sets use-syslog to "no".
243	# logfile: ""
244
245	# Log to syslog(3) if yes. The log facility LOG_DAEMON is used to
246	# log to, with identity "unbound". If yes, it overrides the logfile.
247	# use-syslog: yes
248
249	# print UTC timestamp in ascii to logfile, default is epoch in seconds.
250	# log-time-ascii: no
251
252	# print one line with time, IP, name, type, class for every query.
253	# log-queries: no
254
255	# the pid file. Can be an absolute path outside of chroot/work dir.
256	# pidfile: "/var/unbound/unbound.pid"
257
258	# file to read root hints from.
259	# get one from https://www.internic.net/domain/named.cache
260	# root-hints: ""
261
262	# enable to not answer id.server and hostname.bind queries.
263	# hide-identity: no
264
265	# enable to not answer version.server and version.bind queries.
266	# hide-version: no
267
268	# the identity to report. Leave "" or default to return hostname.
269	# identity: ""
270
271	# the version to report. Leave "" or default to return package version.
272	# version: ""
273
274	# the target fetch policy.
275	# series of integers describing the policy per dependency depth.
276	# The number of values in the list determines the maximum dependency
277	# depth the recursor will pursue before giving up. Each integer means:
278	# 	-1 : fetch all targets opportunistically,
279	# 	0: fetch on demand,
280	#	positive value: fetch that many targets opportunistically.
281	# Enclose the list of numbers between quotes ("").
282	# target-fetch-policy: "3 2 1 0 0"
283
284	# Harden against very small EDNS buffer sizes.
285	# harden-short-bufsize: no
286
287	# Harden against unseemly large queries.
288	# harden-large-queries: no
289
290	# Harden against out of zone rrsets, to avoid spoofing attempts.
291	# harden-glue: yes
292
293	# Harden against receiving dnssec-stripped data. If you turn it
294	# off, failing to validate dnskey data for a trustanchor will
295	# trigger insecure mode for that zone (like without a trustanchor).
296	# Default on, which insists on dnssec data for trust-anchored zones.
297	# harden-dnssec-stripped: yes
298
299	# Harden against queries that fall under dnssec-signed nxdomain names.
300	# harden-below-nxdomain: no
301
302        # Harden the referral path by performing additional queries for
303	# infrastructure data.  Validates the replies (if possible).
304	# Default off, because the lookups burden the server.  Experimental
305	# implementation of draft-wijngaards-dnsext-resolver-side-mitigation.
306	# harden-referral-path: no
307
308	# Harden against algorithm downgrade when multiple algorithms are
309	# advertised in the DS record.  If no, allows the weakest algorithm
310	# to validate the zone.
311	# harden-algo-downgrade: no
312
313	# Sent minimum amount of information to upstream servers to enhance
314	# privacy. Only sent minimum required labels of the QNAME and set QTYPE
315	# to NS when possible.
316	# qname-minimisation: no
317
318	# Use 0x20-encoded random bits in the query to foil spoof attempts.
319	# This feature is an experimental implementation of draft dns-0x20.
320	# use-caps-for-id: no
321
322	# Domains (and domains in them) without support for dns-0x20 and
323	# the fallback fails because they keep sending different answers.
324	# caps-whitelist: "licdn.com"
325
326	# Enforce privacy of these addresses. Strips them away from answers.
327	# It may cause DNSSEC validation to additionally mark it as bogus.
328	# Protects against 'DNS Rebinding' (uses browser as network proxy).
329	# Only 'private-domain' and 'local-data' names are allowed to have
330	# these private addresses. No default.
331	# private-address: 10.0.0.0/8
332	# private-address: 172.16.0.0/12
333	# private-address: 192.168.0.0/16
334	# private-address: 169.254.0.0/16
335	# private-address: fd00::/8
336	# private-address: fe80::/10
337	# private-address: ::ffff:0:0/96
338
339	# Allow the domain (and its subdomains) to contain private addresses.
340	# local-data statements are allowed to contain private addresses too.
341	# private-domain: "example.com"
342
343	# If nonzero, unwanted replies are not only reported in statistics,
344	# but also a running total is kept per thread. If it reaches the
345	# threshold, a warning is printed and a defensive action is taken,
346	# the cache is cleared to flush potential poison out of it.
347	# A suggested value is 10000000, the default is 0 (turned off).
348	# unwanted-reply-threshold: 0
349
350	# Do not query the following addresses. No DNS queries are sent there.
351	# List one address per entry. List classless netblocks with /size,
352	# do-not-query-address: 127.0.0.1/8
353	# do-not-query-address: ::1
354
355	# if yes, the above default do-not-query-address entries are present.
356	# if no, localhost can be queried (for testing and debugging).
357	# do-not-query-localhost: yes
358
359	# if yes, perform prefetching of almost expired message cache entries.
360	# prefetch: no
361
362	# if yes, perform key lookups adjacent to normal lookups.
363	# prefetch-key: no
364
365	# if yes, Unbound rotates RRSet order in response.
366	# rrset-roundrobin: no
367
368	# if yes, Unbound doesn't insert authority/additional sections
369	# into response messages when those sections are not required.
370	# minimal-responses: no
371
372	# true to disable DNSSEC lameness check in iterator.
373	# disable-dnssec-lame-check: no
374
375	# module configuration of the server. A string with identifiers
376	# separated by spaces. Syntax: "[dns64] [validator] iterator"
377	# module-config: "validator iterator"
378
379	# File with trusted keys, kept uptodate using RFC5011 probes,
380	# initial file like trust-anchor-file, then it stores metadata.
381	# Use several entries, one per domain name, to track multiple zones.
382	#
383	# If you want to perform DNSSEC validation, run unbound-anchor before
384	# you start unbound (i.e. in the system boot scripts).  And enable:
385	# Please note usage of unbound-anchor root anchor is at your own risk
386	# and under the terms of our LICENSE (see that file in the source).
387	# auto-trust-anchor-file: "/var/unbound/root.key"
388
389	# File with DLV trusted keys. Same format as trust-anchor-file.
390	# There can be only one DLV configured, it is trusted from root down.
391	# DLV is going to be decommissioned.  Please do not use it any more.
392	# dlv-anchor-file: "dlv.isc.org.key"
393
394	# File with trusted keys for validation. Specify more than one file
395	# with several entries, one file per entry.
396	# Zone file format, with DS and DNSKEY entries.
397	# Note this gets out of date, use auto-trust-anchor-file please.
398	# trust-anchor-file: ""
399
400	# Trusted key for validation. DS or DNSKEY. specify the RR on a
401	# single line, surrounded by "". TTL is ignored. class is IN default.
402	# Note this gets out of date, use auto-trust-anchor-file please.
403	# (These examples are from August 2007 and may not be valid anymore).
404	# trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2BiVmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy32DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ=="
405	# trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A0BA4D17FA9B038BE4A"
406
407	# File with trusted keys for validation. Specify more than one file
408	# with several entries, one file per entry. Like trust-anchor-file
409	# but has a different file format. Format is BIND-9 style format,
410	# the trusted-keys { name flag proto algo "key"; }; clauses are read.
411	# you need external update procedures to track changes in keys.
412	# trusted-keys-file: ""
413
414	# Ignore chain of trust. Domain is treated as insecure.
415	# domain-insecure: "example.com"
416
417	# Override the date for validation with a specific fixed date.
418	# Do not set this unless you are debugging signature inception
419	# and expiration. "" or "0" turns the feature off. -1 ignores date.
420	# val-override-date: ""
421
422	# The time to live for bogus data, rrsets and messages. This avoids
423	# some of the revalidation, until the time interval expires. in secs.
424	# val-bogus-ttl: 60
425
426	# The signature inception and expiration dates are allowed to be off
427	# by 10% of the signature lifetime (expir-incep) from our local clock.
428	# This leeway is capped with a minimum and a maximum.  In seconds.
429	# val-sig-skew-min: 3600
430	# val-sig-skew-max: 86400
431
432	# Should additional section of secure message also be kept clean of
433	# unsecure data. Useful to shield the users of this validator from
434	# potential bogus data in the additional section. All unsigned data
435	# in the additional section is removed from secure messages.
436	# val-clean-additional: yes
437
438	# Turn permissive mode on to permit bogus messages. Thus, messages
439	# for which security checks failed will be returned to clients,
440	# instead of SERVFAIL. It still performs the security checks, which
441	# result in interesting log files and possibly the AD bit in
442	# replies if the message is found secure. The default is off.
443	# val-permissive-mode: no
444
445	# Ignore the CD flag in incoming queries and refuse them bogus data.
446	# Enable it if the only clients of unbound are legacy servers (w2008)
447	# that set CD but cannot validate themselves.
448	# ignore-cd-flag: no
449
450	# Have the validator log failed validations for your diagnosis.
451	# 0: off. 1: A line per failed user query. 2: With reason and bad IP.
452	# val-log-level: 0
453
454	# It is possible to configure NSEC3 maximum iteration counts per
455	# keysize. Keep this table very short, as linear search is done.
456	# A message with an NSEC3 with larger count is marked insecure.
457	# List in ascending order the keysize and count values.
458	# val-nsec3-keysize-iterations: "1024 150 2048 500 4096 2500"
459
460	# instruct the auto-trust-anchor-file probing to add anchors after ttl.
461	# add-holddown: 2592000 # 30 days
462
463	# instruct the auto-trust-anchor-file probing to del anchors after ttl.
464	# del-holddown: 2592000 # 30 days
465
466	# auto-trust-anchor-file probing removes missing anchors after ttl.
467	# If the value 0 is given, missing anchors are not removed.
468	# keep-missing: 31622400 # 366 days
469
470	# debug option that allows very small holddown times for key rollover,
471	# otherwise the RFC mandates probe intervals must be at least 1 hour.
472	# permit-small-holddown: no
473
474	# the amount of memory to use for the key cache.
475	# plain value in bytes or you can append k, m or G. default is "4Mb".
476	# key-cache-size: 4m
477
478	# the number of slabs to use for the key cache.
479	# the number of slabs must be a power of 2.
480	# more slabs reduce lock contention, but fragment memory usage.
481	# key-cache-slabs: 4
482
483	# the amount of memory to use for the negative cache (used for DLV).
484	# plain value in bytes or you can append k, m or G. default is "1Mb".
485	# neg-cache-size: 1m
486
487	# By default, for a number of zones a small default 'nothing here'
488	# reply is built-in.  Query traffic is thus blocked.  If you
489	# wish to serve such zone you can unblock them by uncommenting one
490	# of the nodefault statements below.
491	# You may also have to use domain-insecure: zone to make DNSSEC work,
492	# unless you have your own trust anchors for this zone.
493	# local-zone: "localhost." nodefault
494	# local-zone: "127.in-addr.arpa." nodefault
495	# 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
496	# local-zone: "onion." nodefault
497	# local-zone: "10.in-addr.arpa." nodefault
498	# local-zone: "16.172.in-addr.arpa." nodefault
499	# local-zone: "17.172.in-addr.arpa." nodefault
500	# local-zone: "18.172.in-addr.arpa." nodefault
501	# local-zone: "19.172.in-addr.arpa." nodefault
502	# local-zone: "20.172.in-addr.arpa." nodefault
503	# local-zone: "21.172.in-addr.arpa." nodefault
504	# local-zone: "22.172.in-addr.arpa." nodefault
505	# local-zone: "23.172.in-addr.arpa." nodefault
506	# local-zone: "24.172.in-addr.arpa." nodefault
507	# local-zone: "25.172.in-addr.arpa." nodefault
508	# local-zone: "26.172.in-addr.arpa." nodefault
509	# local-zone: "27.172.in-addr.arpa." nodefault
510	# local-zone: "28.172.in-addr.arpa." nodefault
511	# local-zone: "29.172.in-addr.arpa." nodefault
512	# local-zone: "30.172.in-addr.arpa." nodefault
513	# local-zone: "31.172.in-addr.arpa." nodefault
514	# local-zone: "168.192.in-addr.arpa." nodefault
515	# local-zone: "0.in-addr.arpa." nodefault
516	# local-zone: "254.169.in-addr.arpa." nodefault
517	# local-zone: "2.0.192.in-addr.arpa." nodefault
518	# local-zone: "100.51.198.in-addr.arpa." nodefault
519	# local-zone: "113.0.203.in-addr.arpa." nodefault
520	# local-zone: "255.255.255.255.in-addr.arpa." nodefault
521	# 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
522	# local-zone: "d.f.ip6.arpa." nodefault
523	# local-zone: "8.e.f.ip6.arpa." nodefault
524	# local-zone: "9.e.f.ip6.arpa." nodefault
525	# local-zone: "a.e.f.ip6.arpa." nodefault
526	# local-zone: "b.e.f.ip6.arpa." nodefault
527	# local-zone: "8.b.d.0.1.0.0.2.ip6.arpa." nodefault
528	# And for 64.100.in-addr.arpa. to 127.100.in-addr.arpa.
529
530	# If unbound is running service for the local host then it is useful
531	# to perform lan-wide lookups to the upstream, and unblock the
532	# long list of local-zones above.  If this unbound is a dns server
533	# for a network of computers, disabled is better and stops information
534	# leakage of local lan information.
535	# unblock-lan-zones: no
536
537	# The insecure-lan-zones option disables validation for
538	# these zones, as if they were all listed as domain-insecure.
539	# insecure-lan-zones: no
540
541	# a number of locally served zones can be configured.
542	# 	local-zone: <zone> <type>
543	# 	local-data: "<resource record string>"
544	# o deny serves local data (if any), else, drops queries.
545	# o refuse serves local data (if any), else, replies with error.
546	# o static serves local data, else, nxdomain or nodata answer.
547	# o transparent gives local data, but resolves normally for other names
548	# o redirect serves the zone data for any subdomain in the zone.
549	# o nodefault can be used to normally resolve AS112 zones.
550	# o typetransparent resolves normally for other types and other names
551	# o inform resolves normally, but logs client IP address
552	# o inform_deny drops queries and logs client IP address
553	#
554	# defaults are localhost address, reverse for 127.0.0.1 and ::1
555	# and nxdomain for AS112 zones. If you configure one of these zones
556	# the default content is omitted, or you can omit it with 'nodefault'.
557	#
558	# If you configure local-data without specifying local-zone, by
559	# default a transparent local-zone is created for the data.
560	#
561	# You can add locally served data with
562	# local-zone: "local." static
563	# local-data: "mycomputer.local. IN A 192.0.2.51"
564	# local-data: 'mytext.local TXT "content of text record"'
565	#
566	# You can override certain queries with
567	# local-data: "adserver.example.com A 127.0.0.1"
568	#
569	# You can redirect a domain to a fixed address with
570	# (this makes example.com, www.example.com, etc, all go to 192.0.2.3)
571	# local-zone: "example.com" redirect
572	# local-data: "example.com A 192.0.2.3"
573	#
574	# Shorthand to make PTR records, "IPv4 name" or "IPv6 name".
575	# You can also add PTR records using local-data directly, but then
576	# you need to do the reverse notation yourself.
577	# local-data-ptr: "192.0.2.3 www.example.com"
578
579	# service clients over SSL (on the TCP sockets), with plain DNS inside
580	# the SSL stream.  Give the certificate to use and private key.
581	# default is "" (disabled).  requires restart to take effect.
582	# ssl-service-key: "path/to/privatekeyfile.key"
583	# ssl-service-pem: "path/to/publiccertfile.pem"
584	# ssl-port: 853
585
586	# request upstream over SSL (with plain DNS inside the SSL stream).
587	# Default is no.  Can be turned on and off with unbound-control.
588	# ssl-upstream: no
589
590	# DNS64 prefix. Must be specified when DNS64 is use.
591	# Enable dns64 in module-config.  Used to synthesize IPv6 from IPv4.
592	# dns64-prefix: 64:ff9b::0/96
593
594	# ratelimit for uncached, new queries, this limits recursion effort.
595	# ratelimiting is experimental, and may help against randomqueryflood.
596	# if 0(default) it is disabled, otherwise state qps allowed per zone.
597	# ratelimit: 0
598
599	# ratelimits are tracked in a cache, size in bytes of cache (or k,m).
600	# ratelimit-size: 4m
601	# ratelimit cache slabs, reduces lock contention if equal to cpucount.
602	# ratelimit-slabs: 4
603
604	# 0 blocks when ratelimited, otherwise let 1/xth traffic through
605	# ratelimit-factor: 10
606
607	# override the ratelimit for a specific domain name.
608	# give this setting multiple times to have multiple overrides.
609	# ratelimit-for-domain: example.com 1000
610	# override the ratelimits for all domains below a domain name
611	# can give this multiple times, the name closest to the zone is used.
612	# ratelimit-below-domain: example 1000
613
614# Python config section. To enable:
615# o use --with-pythonmodule to configure before compiling.
616# o list python in the module-config string (above) to enable.
617# o and give a python-script to run.
618python:
619	# Script file to load
620	# python-script: "/var/unbound/ubmodule-tst.py"
621
622# Remote control config section.
623remote-control:
624	# Enable remote control with unbound-control(8) here.
625	# set up the keys and certificates with unbound-control-setup.
626	# control-enable: no
627
628	# Set to no and use an absolute path as control-interface to use
629	# a unix local named pipe for unbound-control.
630	# control-use-cert: yes
631
632	# what interfaces are listened to for remote control.
633	# give 0.0.0.0 and ::0 to listen to all interfaces.
634	# control-interface: 127.0.0.1
635	# control-interface: ::1
636
637	# port number for remote control operations.
638	# control-port: 8953
639
640	# unbound server key file.
641	# server-key-file: "/var/unbound/unbound_server.key"
642
643	# unbound server certificate file.
644	# server-cert-file: "/var/unbound/unbound_server.pem"
645
646	# unbound-control key file.
647	# control-key-file: "/var/unbound/unbound_control.key"
648
649	# unbound-control certificate file.
650	# control-cert-file: "/var/unbound/unbound_control.pem"
651
652# Stub zones.
653# Create entries like below, to make all queries for 'example.com' and
654# 'example.org' go to the given list of nameservers. list zero or more
655# nameservers by hostname or by ipaddress. If you set stub-prime to yes,
656# the list is treated as priming hints (default is no).
657# With stub-first yes, it attempts without the stub if it fails.
658# Consider adding domain-insecure: name and local-zone: name nodefault
659# to the server: section if the stub is a locally served zone.
660# stub-zone:
661#	name: "example.com"
662#	stub-addr: 192.0.2.68
663#	stub-prime: no
664#	stub-first: no
665# stub-zone:
666#	name: "example.org"
667#	stub-host: ns.example.com.
668
669# Forward zones
670# Create entries like below, to make all queries for 'example.com' and
671# 'example.org' go to the given list of servers. These servers have to handle
672# recursion to other nameservers. List zero or more nameservers by hostname
673# or by ipaddress. Use an entry with name "." to forward all queries.
674# If you enable forward-first, it attempts without the forward if it fails.
675# forward-zone:
676# 	name: "example.com"
677# 	forward-addr: 192.0.2.68
678# 	forward-addr: 192.0.2.73@5355  # forward to port 5355.
679# 	forward-first: no
680# forward-zone:
681# 	name: "example.org"
682# 	forward-host: fwd.example.com
683