example.conf.in revision 1.1.1.4
1# 2# Example configuration file. 3# 4# See unbound.conf(5) man page, version 1.9.1. 5# 6# this is a comment. 7 8#Use this to include other text into the file. 9#include: "otherfile.conf" 10 11# The server clause sets the main parameters. 12server: 13 # whitespace is not necessary, but looks cleaner. 14 15 # verbosity number, 0 is least verbose. 1 is default. 16 verbosity: 1 17 18 # print statistics to the log (for every thread) every N seconds. 19 # Set to "" or 0 to disable. Default is disabled. 20 # statistics-interval: 0 21 22 # enable shm for stats, default no. if you enable also enable 23 # statistics-interval, every time it also writes stats to the 24 # shared memory segment keyed with shm-key. 25 # shm-enable: no 26 27 # shm for stats uses this key, and key+1 for the shared mem segment. 28 # shm-key: 11777 29 30 # enable cumulative statistics, without clearing them after printing. 31 # statistics-cumulative: no 32 33 # enable extended statistics (query types, answer codes, status) 34 # printed from unbound-control. default off, because of speed. 35 # extended-statistics: no 36 37 # number of threads to create. 1 disables threading. 38 # num-threads: 1 39 40 # specify the interfaces to answer queries from by ip-address. 41 # The default is to listen to localhost (127.0.0.1 and ::1). 42 # specify 0.0.0.0 and ::0 to bind to all available interfaces. 43 # specify every interface[@port] on a new 'interface:' labelled line. 44 # The listen interfaces are not changed on reload, only on restart. 45 # interface: 192.0.2.153 46 # interface: 192.0.2.154 47 # interface: 192.0.2.154@5003 48 # interface: 2001:DB8::5 49 50 # enable this feature to copy the source address of queries to reply. 51 # Socket options are not supported on all platforms. experimental. 52 # interface-automatic: no 53 54 # port to answer queries from 55 # port: 53 56 57 # specify the interfaces to send outgoing queries to authoritative 58 # server from by ip-address. If none, the default (all) interface 59 # is used. Specify every interface on a 'outgoing-interface:' line. 60 # outgoing-interface: 192.0.2.153 61 # outgoing-interface: 2001:DB8::5 62 # outgoing-interface: 2001:DB8::6 63 64 # Specify a netblock to use remainder 64 bits as random bits for 65 # upstream queries. Uses freebind option (Linux). 66 # outgoing-interface: 2001:DB8::/64 67 # Also (Linux:) ip -6 addr add 2001:db8::/64 dev lo 68 # And: ip -6 route add local 2001:db8::/64 dev lo 69 # And set prefer-ip6: yes to use the ip6 randomness from a netblock. 70 # Set this to yes to prefer ipv6 upstream servers over ipv4. 71 # prefer-ip6: no 72 73 # number of ports to allocate per thread, determines the size of the 74 # port range that can be open simultaneously. About double the 75 # num-queries-per-thread, or, use as many as the OS will allow you. 76 # outgoing-range: 4096 77 78 # permit unbound to use this port number or port range for 79 # making outgoing queries, using an outgoing interface. 80 # outgoing-port-permit: 32768 81 82 # deny unbound the use this of port number or port range for 83 # making outgoing queries, using an outgoing interface. 84 # Use this to make sure unbound does not grab a UDP port that some 85 # other server on this computer needs. The default is to avoid 86 # IANA-assigned port numbers. 87 # If multiple outgoing-port-permit and outgoing-port-avoid options 88 # are present, they are processed in order. 89 # outgoing-port-avoid: "3200-3208" 90 91 # number of outgoing simultaneous tcp buffers to hold per thread. 92 # outgoing-num-tcp: 10 93 94 # number of incoming simultaneous tcp buffers to hold per thread. 95 # incoming-num-tcp: 10 96 97 # buffer size for UDP port 53 incoming (SO_RCVBUF socket option). 98 # 0 is system default. Use 4m to catch query spikes for busy servers. 99 # so-rcvbuf: 0 100 101 # buffer size for UDP port 53 outgoing (SO_SNDBUF socket option). 102 # 0 is system default. Use 4m to handle spikes on very busy servers. 103 # so-sndbuf: 0 104 105 # use SO_REUSEPORT to distribute queries over threads. 106 # so-reuseport: yes 107 108 # use IP_TRANSPARENT so the interface: addresses can be non-local 109 # and you can config non-existing IPs that are going to work later on 110 # (uses IP_BINDANY on FreeBSD). 111 # ip-transparent: no 112 113 # use IP_FREEBIND so the interface: addresses can be non-local 114 # and you can bind to nonexisting IPs and interfaces that are down. 115 # Linux only. On Linux you also have ip-transparent that is similar. 116 # ip-freebind: no 117 118 # EDNS reassembly buffer to advertise to UDP peers (the actual buffer 119 # is set with msg-buffer-size). 1472 can solve fragmentation (timeouts) 120 # edns-buffer-size: 4096 121 122 # Maximum UDP response size (not applied to TCP response). 123 # Suggested values are 512 to 4096. Default is 4096. 65536 disables it. 124 # max-udp-size: 4096 125 126 # max memory to use for stream(tcp and tls) waiting result buffers. 127 # stream-wait-size: 4m 128 129 # buffer size for handling DNS data. No messages larger than this 130 # size can be sent or received, by UDP or TCP. In bytes. 131 # msg-buffer-size: 65552 132 133 # the amount of memory to use for the message cache. 134 # plain value in bytes or you can append k, m or G. default is "4Mb". 135 # msg-cache-size: 4m 136 137 # the number of slabs to use for the message cache. 138 # the number of slabs must be a power of 2. 139 # more slabs reduce lock contention, but fragment memory usage. 140 # msg-cache-slabs: 4 141 142 # the number of queries that a thread gets to service. 143 # num-queries-per-thread: 1024 144 145 # if very busy, 50% queries run to completion, 50% get timeout in msec 146 # jostle-timeout: 200 147 148 # msec to wait before close of port on timeout UDP. 0 disables. 149 # delay-close: 0 150 151 # msec for waiting for an unknown server to reply. Increase if you 152 # are behind a slow satellite link, to eg. 1128. 153 # unknown-server-time-limit: 376 154 155 # the amount of memory to use for the RRset cache. 156 # plain value in bytes or you can append k, m or G. default is "4Mb". 157 # rrset-cache-size: 4m 158 159 # the number of slabs to use for the RRset cache. 160 # the number of slabs must be a power of 2. 161 # more slabs reduce lock contention, but fragment memory usage. 162 # rrset-cache-slabs: 4 163 164 # the time to live (TTL) value lower bound, in seconds. Default 0. 165 # If more than an hour could easily give trouble due to stale data. 166 # cache-min-ttl: 0 167 168 # the time to live (TTL) value cap for RRsets and messages in the 169 # cache. Items are not cached for longer. In seconds. 170 # cache-max-ttl: 86400 171 172 # the time to live (TTL) value cap for negative responses in the cache 173 # cache-max-negative-ttl: 3600 174 175 # the time to live (TTL) value for cached roundtrip times, lameness and 176 # EDNS version information for hosts. In seconds. 177 # infra-host-ttl: 900 178 179 # minimum wait time for responses, increase if uplink is long. In msec. 180 # infra-cache-min-rtt: 50 181 182 # the number of slabs to use for the Infrastructure cache. 183 # the number of slabs must be a power of 2. 184 # more slabs reduce lock contention, but fragment memory usage. 185 # infra-cache-slabs: 4 186 187 # the maximum number of hosts that are cached (roundtrip, EDNS, lame). 188 # infra-cache-numhosts: 10000 189 190 # define a number of tags here, use with local-zone, access-control. 191 # repeat the define-tag statement to add additional tags. 192 # define-tag: "tag1 tag2 tag3" 193 194 # Enable IPv4, "yes" or "no". 195 # do-ip4: yes 196 197 # Enable IPv6, "yes" or "no". 198 # do-ip6: yes 199 200 # Enable UDP, "yes" or "no". 201 # do-udp: yes 202 203 # Enable TCP, "yes" or "no". 204 # do-tcp: yes 205 206 # upstream connections use TCP only (and no UDP), "yes" or "no" 207 # useful for tunneling scenarios, default no. 208 # tcp-upstream: no 209 210 # upstream connections also use UDP (even if do-udp is no). 211 # useful if if you want UDP upstream, but don't provide UDP downstream. 212 # udp-upstream-without-downstream: no 213 214 # Maximum segment size (MSS) of TCP socket on which the server 215 # responds to queries. Default is 0, system default MSS. 216 # tcp-mss: 0 217 218 # Maximum segment size (MSS) of TCP socket for outgoing queries. 219 # Default is 0, system default MSS. 220 # outgoing-tcp-mss: 0 221 222 # Idle TCP timeout, connection closed in milliseconds 223 # tcp-idle-timeout: 30000 224 225 # Enable EDNS TCP keepalive option. 226 # edns-tcp-keepalive: no 227 228 # Timeout for EDNS TCP keepalive, in msec. 229 # edns-tcp-keepalive-timeout: 120000 230 231 # Use systemd socket activation for UDP, TCP, and control sockets. 232 # use-systemd: no 233 234 # Detach from the terminal, run in background, "yes" or "no". 235 # Set the value to "no" when unbound runs as systemd service. 236 # do-daemonize: yes 237 238 # control which clients are allowed to make (recursive) queries 239 # to this server. Specify classless netblocks with /size and action. 240 # By default everything is refused, except for localhost. 241 # Choose deny (drop message), refuse (polite error reply), 242 # allow (recursive ok), allow_setrd (recursive ok, rd bit is forced on), 243 # allow_snoop (recursive and nonrecursive ok) 244 # deny_non_local (drop queries unless can be answered from local-data) 245 # refuse_non_local (like deny_non_local but polite error reply). 246 # access-control: 0.0.0.0/0 refuse 247 # access-control: 127.0.0.0/8 allow 248 # access-control: ::0/0 refuse 249 # access-control: ::1 allow 250 # access-control: ::ffff:127.0.0.1 allow 251 252 # tag access-control with list of tags (in "" with spaces between) 253 # Clients using this access control element use localzones that 254 # are tagged with one of these tags. 255 # access-control-tag: 192.0.2.0/24 "tag2 tag3" 256 257 # set action for particular tag for given access control element 258 # if you have multiple tag values, the tag used to lookup the action 259 # is the first tag match between access-control-tag and local-zone-tag 260 # where "first" comes from the order of the define-tag values. 261 # access-control-tag-action: 192.0.2.0/24 tag3 refuse 262 263 # set redirect data for particular tag for access control element 264 # access-control-tag-data: 192.0.2.0/24 tag2 "A 127.0.0.1" 265 266 # Set view for access control element 267 # access-control-view: 192.0.2.0/24 viewname 268 269 # if given, a chroot(2) is done to the given directory. 270 # i.e. you can chroot to the working directory, for example, 271 # for extra security, but make sure all files are in that directory. 272 # 273 # If chroot is enabled, you should pass the configfile (from the 274 # commandline) as a full path from the original root. After the 275 # chroot has been performed the now defunct portion of the config 276 # file path is removed to be able to reread the config after a reload. 277 # 278 # All other file paths (working dir, logfile, roothints, and 279 # key files) can be specified in several ways: 280 # o as an absolute path relative to the new root. 281 # o as a relative path to the working directory. 282 # o as an absolute path relative to the original root. 283 # In the last case the path is adjusted to remove the unused portion. 284 # 285 # The pid file can be absolute and outside of the chroot, it is 286 # written just prior to performing the chroot and dropping permissions. 287 # 288 # Additionally, unbound may need to access /dev/random (for entropy). 289 # How to do this is specific to your OS. 290 # 291 # If you give "" no chroot is performed. The path must not end in a /. 292 # chroot: "@UNBOUND_CHROOT_DIR@" 293 294 # if given, user privileges are dropped (after binding port), 295 # and the given username is assumed. Default is user "unbound". 296 # If you give "" no privileges are dropped. 297 # username: "@UNBOUND_USERNAME@" 298 299 # the working directory. The relative files in this config are 300 # relative to this directory. If you give "" the working directory 301 # is not changed. 302 # If you give a server: directory: dir before include: file statements 303 # then those includes can be relative to the working directory. 304 # directory: "@UNBOUND_RUN_DIR@" 305 306 # the log file, "" means log to stderr. 307 # Use of this option sets use-syslog to "no". 308 # logfile: "" 309 310 # Log to syslog(3) if yes. The log facility LOG_DAEMON is used to 311 # log to. If yes, it overrides the logfile. 312 # use-syslog: yes 313 314 # Log identity to report. if empty, defaults to the name of argv[0] 315 # (usually "unbound"). 316 # log-identity: "" 317 318 # print UTC timestamp in ascii to logfile, default is epoch in seconds. 319 # log-time-ascii: no 320 321 # print one line with time, IP, name, type, class for every query. 322 # log-queries: no 323 324 # print one line per reply, with time, IP, name, type, class, rcode, 325 # timetoresolve, fromcache and responsesize. 326 # log-replies: no 327 328 # log with tag 'query' and 'reply' instead of 'info' for 329 # filtering log-queries and log-replies from the log. 330 # log-tag-queryreply: no 331 332 # log the local-zone actions, like local-zone type inform is enabled 333 # also for the other local zone types. 334 # log-local-actions: no 335 336 # print log lines that say why queries return SERVFAIL to clients. 337 # log-servfail: no 338 339 # the pid file. Can be an absolute path outside of chroot/work dir. 340 # pidfile: "@UNBOUND_PIDFILE@" 341 342 # file to read root hints from. 343 # get one from https://www.internic.net/domain/named.cache 344 # root-hints: "" 345 346 # enable to not answer id.server and hostname.bind queries. 347 # hide-identity: no 348 349 # enable to not answer version.server and version.bind queries. 350 # hide-version: no 351 352 # enable to not answer trustanchor.unbound queries. 353 # hide-trustanchor: no 354 355 # the identity to report. Leave "" or default to return hostname. 356 # identity: "" 357 358 # the version to report. Leave "" or default to return package version. 359 # version: "" 360 361 # the target fetch policy. 362 # series of integers describing the policy per dependency depth. 363 # The number of values in the list determines the maximum dependency 364 # depth the recursor will pursue before giving up. Each integer means: 365 # -1 : fetch all targets opportunistically, 366 # 0: fetch on demand, 367 # positive value: fetch that many targets opportunistically. 368 # Enclose the list of numbers between quotes (""). 369 # target-fetch-policy: "3 2 1 0 0" 370 371 # Harden against very small EDNS buffer sizes. 372 # harden-short-bufsize: no 373 374 # Harden against unseemly large queries. 375 # harden-large-queries: no 376 377 # Harden against out of zone rrsets, to avoid spoofing attempts. 378 # harden-glue: yes 379 380 # Harden against receiving dnssec-stripped data. If you turn it 381 # off, failing to validate dnskey data for a trustanchor will 382 # trigger insecure mode for that zone (like without a trustanchor). 383 # Default on, which insists on dnssec data for trust-anchored zones. 384 # harden-dnssec-stripped: yes 385 386 # Harden against queries that fall under dnssec-signed nxdomain names. 387 # harden-below-nxdomain: yes 388 389 # Harden the referral path by performing additional queries for 390 # infrastructure data. Validates the replies (if possible). 391 # Default off, because the lookups burden the server. Experimental 392 # implementation of draft-wijngaards-dnsext-resolver-side-mitigation. 393 # harden-referral-path: no 394 395 # Harden against algorithm downgrade when multiple algorithms are 396 # advertised in the DS record. If no, allows the weakest algorithm 397 # to validate the zone. 398 # harden-algo-downgrade: no 399 400 # Sent minimum amount of information to upstream servers to enhance 401 # privacy. Only sent minimum required labels of the QNAME and set QTYPE 402 # to A when possible. 403 # qname-minimisation: yes 404 405 # QNAME minimisation in strict mode. Do not fall-back to sending full 406 # QNAME to potentially broken nameservers. A lot of domains will not be 407 # resolvable when this option in enabled. 408 # This option only has effect when qname-minimisation is enabled. 409 # qname-minimisation-strict: no 410 411 # Aggressive NSEC uses the DNSSEC NSEC chain to synthesize NXDOMAIN 412 # and other denials, using information from previous NXDOMAINs answers. 413 # aggressive-nsec: no 414 415 # Use 0x20-encoded random bits in the query to foil spoof attempts. 416 # This feature is an experimental implementation of draft dns-0x20. 417 # use-caps-for-id: no 418 419 # Domains (and domains in them) without support for dns-0x20 and 420 # the fallback fails because they keep sending different answers. 421 # caps-whitelist: "licdn.com" 422 # caps-whitelist: "senderbase.org" 423 424 # Enforce privacy of these addresses. Strips them away from answers. 425 # It may cause DNSSEC validation to additionally mark it as bogus. 426 # Protects against 'DNS Rebinding' (uses browser as network proxy). 427 # Only 'private-domain' and 'local-data' names are allowed to have 428 # these private addresses. No default. 429 # private-address: 10.0.0.0/8 430 # private-address: 172.16.0.0/12 431 # private-address: 192.168.0.0/16 432 # private-address: 169.254.0.0/16 433 # private-address: fd00::/8 434 # private-address: fe80::/10 435 # private-address: ::ffff:0:0/96 436 437 # Allow the domain (and its subdomains) to contain private addresses. 438 # local-data statements are allowed to contain private addresses too. 439 # private-domain: "example.com" 440 441 # If nonzero, unwanted replies are not only reported in statistics, 442 # but also a running total is kept per thread. If it reaches the 443 # threshold, a warning is printed and a defensive action is taken, 444 # the cache is cleared to flush potential poison out of it. 445 # A suggested value is 10000000, the default is 0 (turned off). 446 # unwanted-reply-threshold: 0 447 448 # Do not query the following addresses. No DNS queries are sent there. 449 # List one address per entry. List classless netblocks with /size, 450 # do-not-query-address: 127.0.0.1/8 451 # do-not-query-address: ::1 452 453 # if yes, the above default do-not-query-address entries are present. 454 # if no, localhost can be queried (for testing and debugging). 455 # do-not-query-localhost: yes 456 457 # if yes, perform prefetching of almost expired message cache entries. 458 # prefetch: no 459 460 # if yes, perform key lookups adjacent to normal lookups. 461 # prefetch-key: no 462 463 # deny queries of type ANY with an empty response. 464 # deny-any: no 465 466 # if yes, Unbound rotates RRSet order in response. 467 # rrset-roundrobin: no 468 469 # if yes, Unbound doesn't insert authority/additional sections 470 # into response messages when those sections are not required. 471 # minimal-responses: yes 472 473 # true to disable DNSSEC lameness check in iterator. 474 # disable-dnssec-lame-check: no 475 476 # module configuration of the server. A string with identifiers 477 # separated by spaces. Syntax: "[dns64] [validator] iterator" 478 # most modules have to be listed at the beginning of the line, 479 # except cachedb(just before iterator), and python (at the beginning, 480 # or, just before the iterator). 481 # module-config: "validator iterator" 482 483 # File with trusted keys, kept uptodate using RFC5011 probes, 484 # initial file like trust-anchor-file, then it stores metadata. 485 # Use several entries, one per domain name, to track multiple zones. 486 # 487 # If you want to perform DNSSEC validation, run unbound-anchor before 488 # you start unbound (i.e. in the system boot scripts). And enable: 489 # Please note usage of unbound-anchor root anchor is at your own risk 490 # and under the terms of our LICENSE (see that file in the source). 491 # auto-trust-anchor-file: "@UNBOUND_ROOTKEY_FILE@" 492 493 # trust anchor signaling sends a RFC8145 key tag query after priming. 494 # trust-anchor-signaling: yes 495 496 # Root key trust anchor sentinel (draft-ietf-dnsop-kskroll-sentinel) 497 # root-key-sentinel: yes 498 499 # File with DLV trusted keys. Same format as trust-anchor-file. 500 # There can be only one DLV configured, it is trusted from root down. 501 # DLV is going to be decommissioned. Please do not use it any more. 502 # dlv-anchor-file: "dlv.isc.org.key" 503 504 # File with trusted keys for validation. Specify more than one file 505 # with several entries, one file per entry. 506 # Zone file format, with DS and DNSKEY entries. 507 # Note this gets out of date, use auto-trust-anchor-file please. 508 # trust-anchor-file: "" 509 510 # Trusted key for validation. DS or DNSKEY. specify the RR on a 511 # single line, surrounded by "". TTL is ignored. class is IN default. 512 # Note this gets out of date, use auto-trust-anchor-file please. 513 # (These examples are from August 2007 and may not be valid anymore). 514 # trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2BiVmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy32DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ==" 515 # trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A0BA4D17FA9B038BE4A" 516 517 # File with trusted keys for validation. Specify more than one file 518 # with several entries, one file per entry. Like trust-anchor-file 519 # but has a different file format. Format is BIND-9 style format, 520 # the trusted-keys { name flag proto algo "key"; }; clauses are read. 521 # you need external update procedures to track changes in keys. 522 # trusted-keys-file: "" 523 524 # Ignore chain of trust. Domain is treated as insecure. 525 # domain-insecure: "example.com" 526 527 # Override the date for validation with a specific fixed date. 528 # Do not set this unless you are debugging signature inception 529 # and expiration. "" or "0" turns the feature off. -1 ignores date. 530 # val-override-date: "" 531 532 # The time to live for bogus data, rrsets and messages. This avoids 533 # some of the revalidation, until the time interval expires. in secs. 534 # val-bogus-ttl: 60 535 536 # The signature inception and expiration dates are allowed to be off 537 # by 10% of the signature lifetime (expir-incep) from our local clock. 538 # This leeway is capped with a minimum and a maximum. In seconds. 539 # val-sig-skew-min: 3600 540 # val-sig-skew-max: 86400 541 542 # Should additional section of secure message also be kept clean of 543 # unsecure data. Useful to shield the users of this validator from 544 # potential bogus data in the additional section. All unsigned data 545 # in the additional section is removed from secure messages. 546 # val-clean-additional: yes 547 548 # Turn permissive mode on to permit bogus messages. Thus, messages 549 # for which security checks failed will be returned to clients, 550 # instead of SERVFAIL. It still performs the security checks, which 551 # result in interesting log files and possibly the AD bit in 552 # replies if the message is found secure. The default is off. 553 # val-permissive-mode: no 554 555 # Ignore the CD flag in incoming queries and refuse them bogus data. 556 # Enable it if the only clients of unbound are legacy servers (w2008) 557 # that set CD but cannot validate themselves. 558 # ignore-cd-flag: no 559 560 # Serve expired responses from cache, with TTL 0 in the response, 561 # and then attempt to fetch the data afresh. 562 # serve-expired: no 563 # 564 # Limit serving of expired responses to configured seconds after 565 # expiration. 0 disables the limit. 566 # serve-expired-ttl: 0 567 # 568 # Set the TTL of expired records to the serve-expired-ttl value after a 569 # failed attempt to retrieve the record from upstream. This makes sure 570 # that the expired records will be served as long as there are queries 571 # for it. 572 # serve-expired-ttl-reset: no 573 574 # Have the validator log failed validations for your diagnosis. 575 # 0: off. 1: A line per failed user query. 2: With reason and bad IP. 576 # val-log-level: 0 577 578 # It is possible to configure NSEC3 maximum iteration counts per 579 # keysize. Keep this table very short, as linear search is done. 580 # A message with an NSEC3 with larger count is marked insecure. 581 # List in ascending order the keysize and count values. 582 # val-nsec3-keysize-iterations: "1024 150 2048 500 4096 2500" 583 584 # instruct the auto-trust-anchor-file probing to add anchors after ttl. 585 # add-holddown: 2592000 # 30 days 586 587 # instruct the auto-trust-anchor-file probing to del anchors after ttl. 588 # del-holddown: 2592000 # 30 days 589 590 # auto-trust-anchor-file probing removes missing anchors after ttl. 591 # If the value 0 is given, missing anchors are not removed. 592 # keep-missing: 31622400 # 366 days 593 594 # debug option that allows very small holddown times for key rollover, 595 # otherwise the RFC mandates probe intervals must be at least 1 hour. 596 # permit-small-holddown: no 597 598 # the amount of memory to use for the key cache. 599 # plain value in bytes or you can append k, m or G. default is "4Mb". 600 # key-cache-size: 4m 601 602 # the number of slabs to use for the key cache. 603 # the number of slabs must be a power of 2. 604 # more slabs reduce lock contention, but fragment memory usage. 605 # key-cache-slabs: 4 606 607 # the amount of memory to use for the negative cache (used for DLV). 608 # plain value in bytes or you can append k, m or G. default is "1Mb". 609 # neg-cache-size: 1m 610 611 # By default, for a number of zones a small default 'nothing here' 612 # reply is built-in. Query traffic is thus blocked. If you 613 # wish to serve such zone you can unblock them by uncommenting one 614 # of the nodefault statements below. 615 # You may also have to use domain-insecure: zone to make DNSSEC work, 616 # unless you have your own trust anchors for this zone. 617 # local-zone: "localhost." nodefault 618 # local-zone: "127.in-addr.arpa." nodefault 619 # 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 620 # local-zone: "onion." nodefault 621 # local-zone: "test." nodefault 622 # local-zone: "invalid." nodefault 623 # local-zone: "10.in-addr.arpa." nodefault 624 # local-zone: "16.172.in-addr.arpa." nodefault 625 # local-zone: "17.172.in-addr.arpa." nodefault 626 # local-zone: "18.172.in-addr.arpa." nodefault 627 # local-zone: "19.172.in-addr.arpa." nodefault 628 # local-zone: "20.172.in-addr.arpa." nodefault 629 # local-zone: "21.172.in-addr.arpa." nodefault 630 # local-zone: "22.172.in-addr.arpa." nodefault 631 # local-zone: "23.172.in-addr.arpa." nodefault 632 # local-zone: "24.172.in-addr.arpa." nodefault 633 # local-zone: "25.172.in-addr.arpa." nodefault 634 # local-zone: "26.172.in-addr.arpa." nodefault 635 # local-zone: "27.172.in-addr.arpa." nodefault 636 # local-zone: "28.172.in-addr.arpa." nodefault 637 # local-zone: "29.172.in-addr.arpa." nodefault 638 # local-zone: "30.172.in-addr.arpa." nodefault 639 # local-zone: "31.172.in-addr.arpa." nodefault 640 # local-zone: "168.192.in-addr.arpa." nodefault 641 # local-zone: "0.in-addr.arpa." nodefault 642 # local-zone: "254.169.in-addr.arpa." nodefault 643 # local-zone: "2.0.192.in-addr.arpa." nodefault 644 # local-zone: "100.51.198.in-addr.arpa." nodefault 645 # local-zone: "113.0.203.in-addr.arpa." nodefault 646 # local-zone: "255.255.255.255.in-addr.arpa." nodefault 647 # 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 648 # local-zone: "d.f.ip6.arpa." nodefault 649 # local-zone: "8.e.f.ip6.arpa." nodefault 650 # local-zone: "9.e.f.ip6.arpa." nodefault 651 # local-zone: "a.e.f.ip6.arpa." nodefault 652 # local-zone: "b.e.f.ip6.arpa." nodefault 653 # local-zone: "8.b.d.0.1.0.0.2.ip6.arpa." nodefault 654 # And for 64.100.in-addr.arpa. to 127.100.in-addr.arpa. 655 656 # If unbound is running service for the local host then it is useful 657 # to perform lan-wide lookups to the upstream, and unblock the 658 # long list of local-zones above. If this unbound is a dns server 659 # for a network of computers, disabled is better and stops information 660 # leakage of local lan information. 661 # unblock-lan-zones: no 662 663 # The insecure-lan-zones option disables validation for 664 # these zones, as if they were all listed as domain-insecure. 665 # insecure-lan-zones: no 666 667 # a number of locally served zones can be configured. 668 # local-zone: <zone> <type> 669 # local-data: "<resource record string>" 670 # o deny serves local data (if any), else, drops queries. 671 # o refuse serves local data (if any), else, replies with error. 672 # o static serves local data, else, nxdomain or nodata answer. 673 # o transparent gives local data, but resolves normally for other names 674 # o redirect serves the zone data for any subdomain in the zone. 675 # o nodefault can be used to normally resolve AS112 zones. 676 # o typetransparent resolves normally for other types and other names 677 # o inform acts like transparent, but logs client IP address 678 # o inform_deny drops queries and logs client IP address 679 # o inform_redirect redirects queries and logs client IP address 680 # o always_transparent, always_refuse, always_nxdomain, resolve in 681 # that way but ignore local data for that name 682 # o noview breaks out of that view towards global local-zones. 683 # 684 # defaults are localhost address, reverse for 127.0.0.1 and ::1 685 # and nxdomain for AS112 zones. If you configure one of these zones 686 # the default content is omitted, or you can omit it with 'nodefault'. 687 # 688 # If you configure local-data without specifying local-zone, by 689 # default a transparent local-zone is created for the data. 690 # 691 # You can add locally served data with 692 # local-zone: "local." static 693 # local-data: "mycomputer.local. IN A 192.0.2.51" 694 # local-data: 'mytext.local TXT "content of text record"' 695 # 696 # You can override certain queries with 697 # local-data: "adserver.example.com A 127.0.0.1" 698 # 699 # You can redirect a domain to a fixed address with 700 # (this makes example.com, www.example.com, etc, all go to 192.0.2.3) 701 # local-zone: "example.com" redirect 702 # local-data: "example.com A 192.0.2.3" 703 # 704 # Shorthand to make PTR records, "IPv4 name" or "IPv6 name". 705 # You can also add PTR records using local-data directly, but then 706 # you need to do the reverse notation yourself. 707 # local-data-ptr: "192.0.2.3 www.example.com" 708 709 # tag a localzone with a list of tag names (in "" with spaces between) 710 # local-zone-tag: "example.com" "tag2 tag3" 711 712 # add a netblock specific override to a localzone, with zone type 713 # local-zone-override: "example.com" 192.0.2.0/24 refuse 714 715 # service clients over TLS (on the TCP sockets), with plain DNS inside 716 # the TLS stream. Give the certificate to use and private key. 717 # default is "" (disabled). requires restart to take effect. 718 # tls-service-key: "path/to/privatekeyfile.key" 719 # tls-service-pem: "path/to/publiccertfile.pem" 720 # tls-port: 853 721 722 # cipher setting for TLSv1.2 723 # 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" 724 # cipher setting for TLSv1.3 725 # 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" 726 727 # Add the secret file for TLS Session Ticket. 728 # Secret file must be 80 bytes of random data. 729 # First key use to encrypt and decrypt TLS session tickets. 730 # Other keys use to decrypt only. 731 # requires restart to take effect. 732 # tls-session-ticket-keys: "path/to/secret_file1" 733 # tls-session-ticket-keys: "path/to/secret_file2" 734 735 # request upstream over TLS (with plain DNS inside the TLS stream). 736 # Default is no. Can be turned on and off with unbound-control. 737 # tls-upstream: no 738 739 # Certificates used to authenticate connections made upstream. 740 # tls-cert-bundle: "" 741 742 # Add system certs to the cert bundle, from the Windows Cert Store 743 # tls-win-cert: no 744 745 # Also serve tls on these port numbers (eg. 443, ...), by listing 746 # tls-additional-port: portno for each of the port numbers. 747 748 # DNS64 prefix. Must be specified when DNS64 is use. 749 # Enable dns64 in module-config. Used to synthesize IPv6 from IPv4. 750 # dns64-prefix: 64:ff9b::0/96 751 752 # DNS64 ignore AAAA records for these domains and use A instead. 753 # dns64-ignore-aaaa: "example.com" 754 755 # ratelimit for uncached, new queries, this limits recursion effort. 756 # ratelimiting is experimental, and may help against randomqueryflood. 757 # if 0(default) it is disabled, otherwise state qps allowed per zone. 758 # ratelimit: 0 759 760 # ratelimits are tracked in a cache, size in bytes of cache (or k,m). 761 # ratelimit-size: 4m 762 # ratelimit cache slabs, reduces lock contention if equal to cpucount. 763 # ratelimit-slabs: 4 764 765 # 0 blocks when ratelimited, otherwise let 1/xth traffic through 766 # ratelimit-factor: 10 767 768 # override the ratelimit for a specific domain name. 769 # give this setting multiple times to have multiple overrides. 770 # ratelimit-for-domain: example.com 1000 771 # override the ratelimits for all domains below a domain name 772 # can give this multiple times, the name closest to the zone is used. 773 # ratelimit-below-domain: com 1000 774 775 # global query ratelimit for all ip addresses. 776 # feature is experimental. 777 # if 0(default) it is disabled, otherwise states qps allowed per ip address 778 # ip-ratelimit: 0 779 780 # ip ratelimits are tracked in a cache, size in bytes of cache (or k,m). 781 # ip-ratelimit-size: 4m 782 # ip ratelimit cache slabs, reduces lock contention if equal to cpucount. 783 # ip-ratelimit-slabs: 4 784 785 # 0 blocks when ip is ratelimited, otherwise let 1/xth traffic through 786 # ip-ratelimit-factor: 10 787 788 # Limit the number of connections simultaneous from a netblock 789 # tcp-connection-limit: 192.0.2.0/24 12 790 791 # select from the fastest servers this many times out of 1000. 0 means 792 # the fast server select is disabled. prefetches are not sped up. 793 # fast-server-permil: 0 794 # the number of servers that will be used in the fast server selection. 795 # fast-server-num: 3 796 797 # Specific options for ipsecmod. unbound needs to be configured with 798 # --enable-ipsecmod for these to take effect. 799 # 800 # Enable or disable ipsecmod (it still needs to be defined in 801 # module-config above). Can be used when ipsecmod needs to be 802 # enabled/disabled via remote-control(below). 803 # ipsecmod-enabled: yes 804 # 805 # Path to executable external hook. It must be defined when ipsecmod is 806 # listed in module-config (above). 807 # ipsecmod-hook: "./my_executable" 808 # 809 # When enabled unbound will reply with SERVFAIL if the return value of 810 # the ipsecmod-hook is not 0. 811 # ipsecmod-strict: no 812 # 813 # Maximum time to live (TTL) for cached A/AAAA records with IPSECKEY. 814 # ipsecmod-max-ttl: 3600 815 # 816 # Reply with A/AAAA even if the relevant IPSECKEY is bogus. Mainly used for 817 # testing. 818 # ipsecmod-ignore-bogus: no 819 # 820 # Domains for which ipsecmod will be triggered. If not defined (default) 821 # all domains are treated as being whitelisted. 822 # ipsecmod-whitelist: "example.com" 823 # ipsecmod-whitelist: "nlnetlabs.nl" 824 825 826# Python config section. To enable: 827# o use --with-pythonmodule to configure before compiling. 828# o list python in the module-config string (above) to enable. 829# It can be at the start, it gets validated results, or just before 830# the iterator and process before DNSSEC validation. 831# o and give a python-script to run. 832python: 833 # Script file to load 834 # python-script: "@UNBOUND_SHARE_DIR@/ubmodule-tst.py" 835 836# Remote control config section. 837remote-control: 838 # Enable remote control with unbound-control(8) here. 839 # set up the keys and certificates with unbound-control-setup. 840 # control-enable: no 841 842 # what interfaces are listened to for remote control. 843 # give 0.0.0.0 and ::0 to listen to all interfaces. 844 # set to an absolute path to use a unix local name pipe, certificates 845 # are not used for that, so key and cert files need not be present. 846 # control-interface: 127.0.0.1 847 # control-interface: ::1 848 849 # port number for remote control operations. 850 # control-port: 8953 851 852 # for localhost, you can disable use of TLS by setting this to "no" 853 # For local sockets this option is ignored, and TLS is not used. 854 # control-use-cert: "yes" 855 856 # unbound server key file. 857 # server-key-file: "@UNBOUND_RUN_DIR@/unbound_server.key" 858 859 # unbound server certificate file. 860 # server-cert-file: "@UNBOUND_RUN_DIR@/unbound_server.pem" 861 862 # unbound-control key file. 863 # control-key-file: "@UNBOUND_RUN_DIR@/unbound_control.key" 864 865 # unbound-control certificate file. 866 # control-cert-file: "@UNBOUND_RUN_DIR@/unbound_control.pem" 867 868# Stub zones. 869# Create entries like below, to make all queries for 'example.com' and 870# 'example.org' go to the given list of nameservers. list zero or more 871# nameservers by hostname or by ipaddress. If you set stub-prime to yes, 872# the list is treated as priming hints (default is no). 873# With stub-first yes, it attempts without the stub if it fails. 874# Consider adding domain-insecure: name and local-zone: name nodefault 875# to the server: section if the stub is a locally served zone. 876# stub-zone: 877# name: "example.com" 878# stub-addr: 192.0.2.68 879# stub-prime: no 880# stub-first: no 881# stub-tls-upstream: no 882# stub-no-cache: no 883# stub-zone: 884# name: "example.org" 885# stub-host: ns.example.com. 886 887# Forward zones 888# Create entries like below, to make all queries for 'example.com' and 889# 'example.org' go to the given list of servers. These servers have to handle 890# recursion to other nameservers. List zero or more nameservers by hostname 891# or by ipaddress. Use an entry with name "." to forward all queries. 892# If you enable forward-first, it attempts without the forward if it fails. 893# forward-zone: 894# name: "example.com" 895# forward-addr: 192.0.2.68 896# forward-addr: 192.0.2.73@5355 # forward to port 5355. 897# forward-first: no 898# forward-tls-upstream: no 899# forward-no-cache: no 900# forward-zone: 901# name: "example.org" 902# forward-host: fwd.example.com 903 904# Authority zones 905# The data for these zones is kept locally, from a file or downloaded. 906# The data can be served to downstream clients, or used instead of the 907# upstream (which saves a lookup to the upstream). The first example 908# has a copy of the root for local usage. The second serves example.org 909# authoritatively. zonefile: reads from file (and writes to it if you also 910# download it), master: fetches with AXFR and IXFR, or url to zonefile. 911# With allow-notify: you can give additional (apart from masters) sources of 912# notifies. 913# auth-zone: 914# name: "." 915# master: 199.9.14.201 # b.root-servers.net 916# master: 192.33.4.12 # c.root-servers.net 917# master: 199.7.91.13 # d.root-servers.net 918# master: 192.5.5.241 # f.root-servers.net 919# master: 192.112.36.4 # g.root-servers.net 920# master: 193.0.14.129 # k.root-servers.net 921# master: 192.0.47.132 # xfr.cjr.dns.icann.org 922# master: 192.0.32.132 # xfr.lax.dns.icann.org 923# master: 2001:500:200::b # b.root-servers.net 924# master: 2001:500:2::c # c.root-servers.net 925# master: 2001:500:2d::d # d.root-servers.net 926# master: 2001:500:2f::f # f.root-servers.net 927# master: 2001:500:12::d0d # g.root-servers.net 928# master: 2001:7fd::1 # k.root-servers.net 929# master: 2620:0:2830:202::132 # xfr.cjr.dns.icann.org 930# master: 2620:0:2d0:202::132 # xfr.lax.dns.icann.org 931# fallback-enabled: yes 932# for-downstream: no 933# for-upstream: yes 934# auth-zone: 935# name: "example.org" 936# for-downstream: yes 937# for-upstream: yes 938# zonefile: "example.org.zone" 939 940# Views 941# Create named views. Name must be unique. Map views to requests using 942# the access-control-view option. Views can contain zero or more local-zone 943# and local-data options. Options from matching views will override global 944# options. Global options will be used if no matching view is found. 945# With view-first yes, it will try to answer using the global local-zone and 946# local-data elements if there is no view specific match. 947# view: 948# name: "viewname" 949# local-zone: "example.com" redirect 950# local-data: "example.com A 192.0.2.3" 951# local-data-ptr: "192.0.2.3 www.example.com" 952# view-first: no 953# view: 954# name: "anotherview" 955# local-zone: "example.com" refuse 956 957# DNSCrypt 958# Caveats: 959# 1. the keys/certs cannot be produced by unbound. You can use dnscrypt-wrapper 960# for this: https://github.com/cofyc/dnscrypt-wrapper/blob/master/README.md#usage 961# 2. dnscrypt channel attaches to an interface. you MUST set interfaces to 962# listen on `dnscrypt-port` with the follo0wing snippet: 963# server: 964# interface: 0.0.0.0@443 965# interface: ::0@443 966# 967# Finally, `dnscrypt` config has its own section. 968# dnscrypt: 969# dnscrypt-enable: yes 970# dnscrypt-port: 443 971# dnscrypt-provider: 2.dnscrypt-cert.example.com. 972# dnscrypt-secret-key: /path/unbound-conf/keys1/1.key 973# dnscrypt-secret-key: /path/unbound-conf/keys2/1.key 974# dnscrypt-provider-cert: /path/unbound-conf/keys1/1.cert 975# dnscrypt-provider-cert: /path/unbound-conf/keys2/1.cert 976 977# CacheDB 978# Enable external backend DB as auxiliary cache. Specify the backend name 979# (default is "testframe", which has no use other than for debugging and 980# testing) and backend-specific options. The 'cachedb' module must be 981# included in module-config, just before the iterator module. 982# cachedb: 983# backend: "testframe" 984# # secret seed string to calculate hashed keys 985# secret-seed: "default" 986# 987# # For "redis" backend: 988# # redis server's IP address or host name 989# redis-server-host: 127.0.0.1 990# # redis server's TCP port 991# redis-server-port: 6379 992# # timeout (in ms) for communication with the redis server 993# redis-timeout: 100 994