2 # Example configuration file.
4 # See unbound.conf(5) man page, version 1.7.3.
8 #Use this to include other text into the file.
9 #include: "otherfile.conf"
11 # The server clause sets the main parameters.
13 # whitespace is not necessary, but looks cleaner.
15 # verbosity number, 0 is least verbose. 1 is default.
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
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.
27 # shm for stats uses this key, and key+1 for the shared mem segment.
30 # enable cumulative statistics, without clearing them after printing.
31 # statistics-cumulative: no
33 # enable extended statistics (query types, answer codes, status)
34 # printed from unbound-control. default off, because of speed.
35 # extended-statistics: no
37 # number of threads to create. 1 disables threading.
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
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
54 # port to answer queries from
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
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.
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
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
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"
91 # number of outgoing simultaneous tcp buffers to hold per thread.
92 # outgoing-num-tcp: 10
94 # number of incoming simultaneous tcp buffers to hold per thread.
95 # incoming-num-tcp: 10
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.
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.
105 # use SO_REUSEPORT to distribute queries over threads.
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).
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.
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
122 # Maximum UDP response size (not applied to TCP response).
123 # Suggested values are 512 to 4096. Default is 4096. 65536 disables it.
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
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".
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.
139 # the number of queries that a thread gets to service.
140 # num-queries-per-thread: 1024
142 # if very busy, 50% queries run to completion, 50% get timeout in msec
143 # jostle-timeout: 200
145 # msec to wait before close of port on timeout UDP. 0 disables.
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
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
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.
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
165 # the time to live (TTL) value cap for negative responses in the cache
166 # cache-max-negative-ttl: 3600
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
172 # minimum wait time for responses, increase if uplink is long. In msec.
173 # infra-cache-min-rtt: 50
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
180 # the maximum number of hosts that are cached (roundtrip, EDNS, lame).
181 # infra-cache-numhosts: 10000
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"
187 # Enable IPv4, "yes" or "no".
190 # Enable IPv6, "yes" or "no".
193 # Enable UDP, "yes" or "no".
196 # Enable TCP, "yes" or "no".
199 # upstream connections use TCP only (and no UDP), "yes" or "no"
200 # useful for tunneling scenarios, default no.
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
207 # Maximum segment size (MSS) of TCP socket on which the server
208 # responds to queries. Default is 0, system default MSS.
211 # Maximum segment size (MSS) of TCP socket for outgoing queries.
212 # Default is 0, system default MSS.
213 # outgoing-tcp-mss: 0
215 # Use systemd socket activation for UDP, TCP, and control sockets.
218 # Detach from the terminal, run in background, "yes" or "no".
219 # Set the value to "no" when unbound runs as systemd service.
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
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"
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
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"
250 # Set view for access control element
251 # access-control-view: 192.0.2.0/24 viewname
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.
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.
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.
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.
272 # Additionally, unbound may need to access /dev/random (for entropy).
273 # How to do this is specific to your OS.
275 # If you give "" no chroot is performed. The path must not end in a /.
276 # chroot: "/var/unbound"
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"
283 # the working directory. The relative files in this config are
284 # relative to this directory. If you give "" the working directory
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: "/var/unbound"
290 # the log file, "" means log to stderr.
291 # Use of this option sets use-syslog to "no".
294 # Log to syslog(3) if yes. The log facility LOG_DAEMON is used to
295 # log to. If yes, it overrides the logfile.
298 # Log identity to report. if empty, defaults to the name of argv[0]
299 # (usually "unbound").
302 # print UTC timestamp in ascii to logfile, default is epoch in seconds.
305 # print one line with time, IP, name, type, class for every query.
308 # print one line per reply, with time, IP, name, type, class, rcode,
309 # timetoresolve, fromcache and responsesize.
312 # the pid file. Can be an absolute path outside of chroot/work dir.
313 # pidfile: "/var/unbound/unbound.pid"
315 # file to read root hints from.
316 # get one from https://www.internic.net/domain/named.cache
319 # enable to not answer id.server and hostname.bind queries.
322 # enable to not answer version.server and version.bind queries.
325 # enable to not answer trustanchor.unbound queries.
326 # hide-trustanchor: no
328 # the identity to report. Leave "" or default to return hostname.
331 # the version to report. Leave "" or default to return package version.
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"
344 # Harden against very small EDNS buffer sizes.
345 # harden-short-bufsize: no
347 # Harden against unseemly large queries.
348 # harden-large-queries: no
350 # Harden against out of zone rrsets, to avoid spoofing attempts.
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
359 # Harden against queries that fall under dnssec-signed nxdomain names.
360 # harden-below-nxdomain: no
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
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
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
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
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
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
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"
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
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"
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
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
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
430 # if yes, perform prefetching of almost expired message cache entries.
433 # if yes, perform key lookups adjacent to normal lookups.
436 # if yes, Unbound rotates RRSet order in response.
437 # rrset-roundrobin: no
439 # if yes, Unbound doesn't insert authority/additional sections
440 # into response messages when those sections are not required.
441 # minimal-responses: no
443 # true to disable DNSSEC lameness check in iterator.
444 # disable-dnssec-lame-check: no
446 # module configuration of the server. A string with identifiers
447 # separated by spaces. Syntax: "[dns64] [validator] iterator"
448 # module-config: "validator iterator"
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.
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: "/var/unbound/root.key"
460 # trust anchor signaling sends a RFC8145 key tag query after priming.
461 # trust-anchor-signaling: yes
463 # Root key trust anchor sentinel (draft-ietf-dnsop-kskroll-sentinel)
464 # root-key-sentinel: yes
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"
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: ""
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"
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: ""
491 # Ignore chain of trust. Domain is treated as insecure.
492 # domain-insecure: "example.com"
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: ""
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.
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
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
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
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.
527 # Serve expired responses from cache, with TTL 0 in the response,
528 # and then attempt to fetch the data afresh.
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.
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"
541 # instruct the auto-trust-anchor-file probing to add anchors after ttl.
542 # add-holddown: 2592000 # 30 days
544 # instruct the auto-trust-anchor-file probing to del anchors after ttl.
545 # del-holddown: 2592000 # 30 days
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
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
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".
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.
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".
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.
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
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
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.
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'.
644 # If you configure local-data without specifying local-zone, by
645 # default a transparent local-zone is created for the data.
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"'
652 # You can override certain queries with
653 # local-data: "adserver.example.com A 127.0.0.1"
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"
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"
665 # tag a localzone with a list of tag names (in "" with spaces between)
666 # local-zone-tag: "example.com" "tag2 tag3"
668 # add a netblock specific override to a localzone, with zone type
669 # local-zone-override: "example.com" 192.0.2.0/24 refuse
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"
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.
682 # Certificates used to authenticate connections made upstream.
683 # tls-cert-bundle: ""
685 # Add system certs to the cert bundle, from the Windows Cert Store
688 # Also serve tls on these port numbers (eg. 443, ...), by listing
689 # tls-additional-port: portno for each of the port numbers.
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
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.
700 # ratelimits are tracked in a cache, size in bytes of cache (or k,m).
702 # ratelimit cache slabs, reduces lock contention if equal to cpucount.
705 # 0 blocks when ratelimited, otherwise let 1/xth traffic through
706 # ratelimit-factor: 10
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
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
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
725 # 0 blocks when ip is ratelimited, otherwise let 1/xth traffic through
726 # ip-ratelimit-factor: 10
728 # what is considered a low rtt (ping time for upstream server), in msec
730 # select low rtt this many times out of 1000. 0 means the fast server
731 # select is disabled. prefetches are not sped up.
734 # Specific options for ipsecmod. unbound needs to be configured with
735 # --enable-ipsecmod for these to take effect.
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
742 # Path to executable external hook. It must be defined when ipsecmod is
743 # listed in module-config (above).
744 # ipsecmod-hook: "./my_executable"
746 # When enabled unbound will reply with SERVFAIL if the return value of
747 # the ipsecmod-hook is not 0.
748 # ipsecmod-strict: no
750 # Maximum time to live (TTL) for cached A/AAAA records with IPSECKEY.
751 # ipsecmod-max-ttl: 3600
753 # Reply with A/AAAA even if the relevant IPSECKEY is bogus. Mainly used for
755 # ipsecmod-ignore-bogus: no
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"
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.
768 # Script file to load
769 # python-script: "/var/unbound/ubmodule-tst.py"
771 # Remote control config section.
773 # Enable remote control with unbound-control(8) here.
774 # set up the keys and certificates with unbound-control-setup.
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
784 # port number for remote control operations.
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"
791 # unbound server key file.
792 # server-key-file: "/var/unbound/unbound_server.key"
794 # unbound server certificate file.
795 # server-cert-file: "/var/unbound/unbound_server.pem"
797 # unbound-control key file.
798 # control-key-file: "/var/unbound/unbound_control.key"
800 # unbound-control certificate file.
801 # control-cert-file: "/var/unbound/unbound_control.pem"
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.
812 # name: "example.com"
813 # stub-addr: 192.0.2.68
816 # stub-tls-upstream: no
818 # name: "example.org"
819 # stub-host: ns.example.com.
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.
828 # name: "example.com"
829 # forward-addr: 192.0.2.68
830 # forward-addr: 192.0.2.73@5355 # forward to port 5355.
832 # forward-tls-upstream: no
834 # name: "example.org"
835 # forward-host: fwd.example.com
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
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
858 # name: "example.org"
859 # for-downstream: yes
861 # zonefile: "example.org.zone"
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.
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"
877 # name: "anotherview"
878 # local-zone: "example.com" refuse
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:
887 # interface: 0.0.0.0@443
890 # Finally, `dnscrypt` config has its own section.
892 # dnscrypt-enable: yes
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
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.
906 # backend: "testframe"
907 # # secret seed string to calculate hashed keys
908 # secret-seed: "default"
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