1# 2# Example configuration file. 3# 4# See unbound.conf(5) man page, version 1.21.1. 5# 6# this is a comment. 7 8# Use this anywhere in the file to include other text into this file. 9#include: "otherfile.conf" 10 11# Use this anywhere in the file to include other text, that explicitly starts a 12# clause, into this file. Text after this directive needs to start a clause. 13#include-toplevel: "otherfile.conf" 14 15# The server clause sets the main parameters. 16server: 17 # whitespace is not necessary, but looks cleaner. 18 19 # verbosity number, 0 is least verbose. 1 is default. 20 # verbosity: 1 21 22 # print statistics to the log (for every thread) every N seconds. 23 # Set to "" or 0 to disable. Default is disabled. 24 # statistics-interval: 0 25 26 # enable shm for stats, default no. if you enable also enable 27 # statistics-interval, every time it also writes stats to the 28 # shared memory segment keyed with shm-key. 29 # shm-enable: no 30 31 # shm for stats uses this key, and key+1 for the shared mem segment. 32 # shm-key: 11777 33 34 # enable cumulative statistics, without clearing them after printing. 35 # statistics-cumulative: no 36 37 # enable extended statistics (query types, answer codes, status) 38 # printed from unbound-control. Default off, because of speed. 39 # extended-statistics: no 40 41 # Inhibits selected extended statistics (qtype, qclass, qopcode, rcode, 42 # rpz-actions) from printing if their value is 0. 43 # Default on. 44 # statistics-inhibit-zero: yes 45 46 # number of threads to create. 1 disables threading. 47 # num-threads: 1 48 49 # specify the interfaces to answer queries from by ip-address. 50 # The default is to listen to localhost (127.0.0.1 and ::1). 51 # specify 0.0.0.0 and ::0 to bind to all available interfaces. 52 # specify every interface[@port] on a new 'interface:' labelled line. 53 # The listen interfaces are not changed on reload, only on restart. 54 # interface: 192.0.2.153 55 # interface: 192.0.2.154 56 # interface: 192.0.2.154@5003 57 # interface: 2001:DB8::5 58 # interface: eth0@5003 59 60 # enable this feature to copy the source address of queries to reply. 61 # Socket options are not supported on all platforms. experimental. 62 # interface-automatic: no 63 64 # instead of the default port, open additional ports separated by 65 # spaces when interface-automatic is enabled, by listing them here. 66 # interface-automatic-ports: "" 67 68 # port to answer queries from 69 # port: 53 70 71 # specify the interfaces to send outgoing queries to authoritative 72 # server from by ip-address. If none, the default (all) interface 73 # is used. Specify every interface on a 'outgoing-interface:' line. 74 # outgoing-interface: 192.0.2.153 75 # outgoing-interface: 2001:DB8::5 76 # outgoing-interface: 2001:DB8::6 77 78 # Specify a netblock to use remainder 64 bits as random bits for 79 # upstream queries. Uses freebind option (Linux). 80 # outgoing-interface: 2001:DB8::/64 81 # Also (Linux:) ip -6 addr add 2001:db8::/64 dev lo 82 # And: ip -6 route add local 2001:db8::/64 dev lo 83 # And set prefer-ip6: yes to use the ip6 randomness from a netblock. 84 # Set this to yes to prefer ipv6 upstream servers over ipv4. 85 # prefer-ip6: no 86 87 # Prefer ipv4 upstream servers, even if ipv6 is available. 88 # prefer-ip4: no 89 90 # number of ports to allocate per thread, determines the size of the 91 # port range that can be open simultaneously. About double the 92 # num-queries-per-thread, or, use as many as the OS will allow you. 93 # outgoing-range: 4096 94 95 # permit Unbound to use this port number or port range for 96 # making outgoing queries, using an outgoing interface. 97 # outgoing-port-permit: 32768 98 99 # deny Unbound the use this of port number or port range for 100 # making outgoing queries, using an outgoing interface. 101 # Use this to make sure Unbound does not grab a UDP port that some 102 # other server on this computer needs. The default is to avoid 103 # IANA-assigned port numbers. 104 # If multiple outgoing-port-permit and outgoing-port-avoid options 105 # are present, they are processed in order. 106 # outgoing-port-avoid: "3200-3208" 107 108 # number of outgoing simultaneous tcp buffers to hold per thread. 109 # outgoing-num-tcp: 10 110 111 # number of incoming simultaneous tcp buffers to hold per thread. 112 # incoming-num-tcp: 10 113 114 # buffer size for UDP port 53 incoming (SO_RCVBUF socket option). 115 # 0 is system default. Use 4m to catch query spikes for busy servers. 116 # so-rcvbuf: 0 117 118 # buffer size for UDP port 53 outgoing (SO_SNDBUF socket option). 119 # 0 is system default. Use 4m to handle spikes on very busy servers. 120 # so-sndbuf: 0 121 122 # use SO_REUSEPORT to distribute queries over threads. 123 # at extreme load it could be better to turn it off to distribute even. 124 # so-reuseport: yes 125 126 # use IP_TRANSPARENT so the interface: addresses can be non-local 127 # and you can config non-existing IPs that are going to work later on 128 # (uses IP_BINDANY on FreeBSD). 129 # ip-transparent: no 130 131 # use IP_FREEBIND so the interface: addresses can be non-local 132 # and you can bind to nonexisting IPs and interfaces that are down. 133 # Linux only. On Linux you also have ip-transparent that is similar. 134 # ip-freebind: no 135 136 # the value of the Differentiated Services Codepoint (DSCP) 137 # in the differentiated services field (DS) of the outgoing 138 # IP packets 139 # ip-dscp: 0 140 141 # EDNS reassembly buffer to advertise to UDP peers (the actual buffer 142 # is set with msg-buffer-size). 143 # edns-buffer-size: 1232 144 145 # Maximum UDP response size (not applied to TCP response). 146 # Suggested values are 512 to 4096. Default is 1232. 65536 disables it. 147 # max-udp-size: 1232 148 149 # max memory to use for stream(tcp and tls) waiting result buffers. 150 # stream-wait-size: 4m 151 152 # buffer size for handling DNS data. No messages larger than this 153 # size can be sent or received, by UDP or TCP. In bytes. 154 # msg-buffer-size: 65552 155 156 # the amount of memory to use for the message cache. 157 # plain value in bytes or you can append k, m or G. default is "4Mb". 158 # msg-cache-size: 4m 159 160 # the number of slabs to use for the message cache. 161 # the number of slabs must be a power of 2. 162 # more slabs reduce lock contention, but fragment memory usage. 163 # msg-cache-slabs: 4 164 165 # the number of queries that a thread gets to service. 166 # num-queries-per-thread: 1024 167 168 # if very busy, 50% queries run to completion, 50% get timeout in msec 169 # jostle-timeout: 200 170 171 # msec to wait before close of port on timeout UDP. 0 disables. 172 # delay-close: 0 173 174 # perform connect for UDP sockets to mitigate ICMP side channel. 175 # udp-connect: yes 176 177 # The number of retries, per upstream nameserver in a delegation, when 178 # a throwaway response (also timeouts) is received. 179 # outbound-msg-retry: 5 180 181 # Hard limit on the number of outgoing queries Unbound will make while 182 # resolving a name, making sure large NS sets do not loop. 183 # It resets on query restarts (e.g., CNAME) and referrals. 184 # max-sent-count: 32 185 186 # Hard limit on the number of times Unbound is allowed to restart a 187 # query upon encountering a CNAME record. 188 # max-query-restarts: 11 189 190 # msec for waiting for an unknown server to reply. Increase if you 191 # are behind a slow satellite link, to eg. 1128. 192 # unknown-server-time-limit: 376 193 194 # msec before recursion replies are dropped. The work item continues. 195 # discard-timeout: 1900 196 197 # Max number of replies waiting for recursion per IP address. 198 # wait-limit: 1000 199 200 # Max replies waiting for recursion for IP address with cookie. 201 # wait-limit-cookie: 10000 202 203 # Apart from the default, the wait limit can be set for a netblock. 204 # wait-limit-netblock: 192.0.2.0/24 50000 205 206 # Apart from the default, the wait limit with cookie can be adjusted. 207 # wait-limit-cookie-netblock: 192.0.2.0/24 50000 208 209 # the amount of memory to use for the RRset cache. 210 # plain value in bytes or you can append k, m or G. default is "4Mb". 211 # rrset-cache-size: 4m 212 213 # the number of slabs to use for the RRset cache. 214 # the number of slabs must be a power of 2. 215 # more slabs reduce lock contention, but fragment memory usage. 216 # rrset-cache-slabs: 4 217 218 # the time to live (TTL) value lower bound, in seconds. Default 0. 219 # If more than an hour could easily give trouble due to stale data. 220 # cache-min-ttl: 0 221 222 # the time to live (TTL) value cap for RRsets and messages in the 223 # cache. Items are not cached for longer. In seconds. 224 # cache-max-ttl: 86400 225 226 # the time to live (TTL) value cap for negative responses in the cache 227 # cache-max-negative-ttl: 3600 228 229 # the time to live (TTL) value lower bound, in seconds. Default 0. 230 # For negative responses in the cache. If disabled, default, 231 # cache-min-ttl applies if configured. 232 # cache-min-negative-ttl: 0 233 234 # the time to live (TTL) value for cached roundtrip times, lameness and 235 # EDNS version information for hosts. In seconds. 236 # infra-host-ttl: 900 237 238 # minimum wait time for responses, increase if uplink is long. In msec. 239 # infra-cache-min-rtt: 50 240 241 # maximum wait time for responses. In msec. 242 # infra-cache-max-rtt: 120000 243 244 # enable to make server probe down hosts more frequently. 245 # infra-keep-probing: no 246 247 # the number of slabs to use for the Infrastructure cache. 248 # the number of slabs must be a power of 2. 249 # more slabs reduce lock contention, but fragment memory usage. 250 # infra-cache-slabs: 4 251 252 # the maximum number of hosts that are cached (roundtrip, EDNS, lame). 253 # infra-cache-numhosts: 10000 254 255 # define a number of tags here, use with local-zone, access-control, 256 # interface-*. 257 # repeat the define-tag statement to add additional tags. 258 # define-tag: "tag1 tag2 tag3" 259 260 # Enable IPv4, "yes" or "no". 261 # do-ip4: yes 262 263 # Enable IPv6, "yes" or "no". 264 # do-ip6: yes 265 266 # If running unbound on an IPv6-only host, domains that only have 267 # IPv4 servers would become unresolveable. If NAT64 is available in 268 # the network, unbound can use NAT64 to reach these servers with 269 # the following option. This is NOT needed for enabling DNS64 on a 270 # system that has IPv4 connectivity. 271 # Consider also enabling prefer-ip6 to prefer native IPv6 connections 272 # to nameservers. 273 # do-nat64: no 274 275 # NAT64 prefix. Defaults to using dns64-prefix value. 276 # nat64-prefix: 64:ff9b::0/96 277 278 # Enable UDP, "yes" or "no". 279 # do-udp: yes 280 281 # Enable TCP, "yes" or "no". 282 # do-tcp: yes 283 284 # upstream connections use TCP only (and no UDP), "yes" or "no" 285 # useful for tunneling scenarios, default no. 286 # tcp-upstream: no 287 288 # upstream connections also use UDP (even if do-udp is no). 289 # useful if if you want UDP upstream, but don't provide UDP downstream. 290 # udp-upstream-without-downstream: no 291 292 # Maximum segment size (MSS) of TCP socket on which the server 293 # responds to queries. Default is 0, system default MSS. 294 # tcp-mss: 0 295 296 # Maximum segment size (MSS) of TCP socket for outgoing queries. 297 # Default is 0, system default MSS. 298 # outgoing-tcp-mss: 0 299 300 # Idle TCP timeout, connection closed in milliseconds 301 # tcp-idle-timeout: 30000 302 303 # Enable EDNS TCP keepalive option. 304 # edns-tcp-keepalive: no 305 306 # Timeout for EDNS TCP keepalive, in msec. Overrides tcp-idle-timeout 307 # if edns-tcp-keepalive is set. 308 # edns-tcp-keepalive-timeout: 120000 309 310 # UDP queries that have waited in the socket buffer for a long time 311 # can be dropped. Default is 0, disabled. In seconds, such as 3. 312 # sock-queue-timeout: 0 313 314 # Use systemd socket activation for UDP, TCP, and control sockets. 315 # use-systemd: no 316 317 # Detach from the terminal, run in background, "yes" or "no". 318 # Set the value to "no" when Unbound runs as systemd service. 319 # do-daemonize: yes 320 321 # control which clients are allowed to make (recursive) queries 322 # to this server. Specify classless netblocks with /size and action. 323 # By default everything is refused, except for localhost. 324 # Choose deny (drop message), refuse (polite error reply), 325 # allow (recursive ok), allow_setrd (recursive ok, rd bit is forced on), 326 # allow_snoop (recursive and nonrecursive ok) 327 # allow_cookie (allow UDP with valid cookie or stateful transport) 328 # deny_non_local (drop queries unless can be answered from local-data) 329 # refuse_non_local (like deny_non_local but polite error reply). 330 # access-control: 127.0.0.0/8 allow 331 # access-control: ::1 allow 332 # access-control: ::ffff:127.0.0.1 allow 333 334 # tag access-control with list of tags (in "" with spaces between) 335 # Clients using this access control element use localzones that 336 # are tagged with one of these tags. 337 # access-control-tag: 192.0.2.0/24 "tag2 tag3" 338 339 # set action for particular tag for given access control element. 340 # if you have multiple tag values, the tag used to lookup the action 341 # is the first tag match between access-control-tag and local-zone-tag 342 # where "first" comes from the order of the define-tag values. 343 # access-control-tag-action: 192.0.2.0/24 tag3 refuse 344 345 # set redirect data for particular tag for access control element 346 # access-control-tag-data: 192.0.2.0/24 tag2 "A 127.0.0.1" 347 348 # Set view for access control element 349 # access-control-view: 192.0.2.0/24 viewname 350 351 # Similar to 'access-control:' but for interfaces. 352 # Control which listening interfaces are allowed to accept (recursive) 353 # queries for this server. 354 # The specified interfaces should be the same as the ones specified in 355 # 'interface:' followed by the action. 356 # The actions are the same as 'access-control:' above. 357 # By default all the interfaces configured are refused. 358 # Note: any 'access-control*:' setting overrides all 'interface-*:' 359 # settings for targeted clients. 360 # interface-action: 192.0.2.153 allow 361 # interface-action: 192.0.2.154 allow 362 # interface-action: 192.0.2.154@5003 allow 363 # interface-action: 2001:DB8::5 allow 364 # interface-action: eth0@5003 allow 365 366 # Similar to 'access-control-tag:' but for interfaces. 367 # Tag interfaces with a list of tags (in "" with spaces between). 368 # Interfaces using these tags use localzones that are tagged with one 369 # of these tags. 370 # The specified interfaces should be the same as the ones specified in 371 # 'interface:' followed by the list of tags. 372 # Note: any 'access-control*:' setting overrides all 'interface-*:' 373 # settings for targeted clients. 374 # interface-tag: eth0@5003 "tag2 tag3" 375 376 # Similar to 'access-control-tag-action:' but for interfaces. 377 # Set action for particular tag for a given interface element. 378 # If you have multiple tag values, the tag used to lookup the action 379 # is the first tag match between interface-tag and local-zone-tag 380 # where "first" comes from the order of the define-tag values. 381 # The specified interfaces should be the same as the ones specified in 382 # 'interface:' followed by the tag and action. 383 # Note: any 'access-control*:' setting overrides all 'interface-*:' 384 # settings for targeted clients. 385 # interface-tag-action: eth0@5003 tag3 refuse 386 387 # Similar to 'access-control-tag-data:' but for interfaces. 388 # Set redirect data for a particular tag for an interface element. 389 # The specified interfaces should be the same as the ones specified in 390 # 'interface:' followed by the tag and the redirect data. 391 # Note: any 'access-control*:' setting overrides all 'interface-*:' 392 # settings for targeted clients. 393 # interface-tag-data: eth0@5003 tag2 "A 127.0.0.1" 394 395 # Similar to 'access-control-view:' but for interfaces. 396 # Set view for an interface element. 397 # The specified interfaces should be the same as the ones specified in 398 # 'interface:' followed by the view name. 399 # Note: any 'access-control*:' setting overrides all 'interface-*:' 400 # settings for targeted clients. 401 # interface-view: eth0@5003 viewname 402 403 # if given, a chroot(2) is done to the given directory. 404 # i.e. you can chroot to the working directory, for example, 405 # for extra security, but make sure all files are in that directory. 406 # 407 # If chroot is enabled, you should pass the configfile (from the 408 # commandline) as a full path from the original root. After the 409 # chroot has been performed the now defunct portion of the config 410 # file path is removed to be able to reread the config after a reload. 411 # 412 # All other file paths (working dir, logfile, roothints, and 413 # key files) can be specified in several ways: 414 # o as an absolute path relative to the new root. 415 # o as a relative path to the working directory. 416 # o as an absolute path relative to the original root. 417 # In the last case the path is adjusted to remove the unused portion. 418 # 419 # The pid file can be absolute and outside of the chroot, it is 420 # written just prior to performing the chroot and dropping permissions. 421 # 422 # Additionally, Unbound may need to access /dev/urandom (for entropy). 423 # How to do this is specific to your OS. 424 # 425 # If you give "" no chroot is performed. The path must not end in a /. 426 # chroot: "@UNBOUND_CHROOT_DIR@" 427 428 # if given, user privileges are dropped (after binding port), 429 # and the given username is assumed. Default is user "unbound". 430 # If you give "" no privileges are dropped. 431 # username: "@UNBOUND_USERNAME@" 432 433 # the working directory. The relative files in this config are 434 # relative to this directory. If you give "" the working directory 435 # is not changed. 436 # If you give a server: directory: dir before include: file statements 437 # then those includes can be relative to the working directory. 438 # directory: "@UNBOUND_RUN_DIR@" 439 440 # the log file, "" means log to stderr. 441 # Use of this option sets use-syslog to "no". 442 # logfile: "" 443 444 # Log to syslog(3) if yes. The log facility LOG_DAEMON is used to 445 # log to. If yes, it overrides the logfile. 446 # use-syslog: yes 447 448 # Log identity to report. if empty, defaults to the name of argv[0] 449 # (usually "unbound"). 450 # log-identity: "" 451 452 # print UTC timestamp in ascii to logfile, default is epoch in seconds. 453 # log-time-ascii: no 454 455 # print one line with time, IP, name, type, class for every query. 456 # log-queries: no 457 458 # print one line per reply, with time, IP, name, type, class, rcode, 459 # timetoresolve, fromcache and responsesize. 460 # log-replies: no 461 462 # log with tag 'query' and 'reply' instead of 'info' for 463 # filtering log-queries and log-replies from the log. 464 # log-tag-queryreply: no 465 466 # log with destination address, port and type for log-replies. 467 # log-destaddr: no 468 469 # log the local-zone actions, like local-zone type inform is enabled 470 # also for the other local zone types. 471 # log-local-actions: no 472 473 # print log lines that say why queries return SERVFAIL to clients. 474 # log-servfail: no 475 476 # the pid file. Can be an absolute path outside of chroot/work dir. 477 # pidfile: "@UNBOUND_PIDFILE@" 478 479 # file to read root hints from. 480 # get one from https://www.internic.net/domain/named.cache 481 # root-hints: "" 482 483 # enable to not answer id.server and hostname.bind queries. 484 # hide-identity: no 485 486 # enable to not answer version.server and version.bind queries. 487 # hide-version: no 488 489 # enable to not answer trustanchor.unbound queries. 490 # hide-trustanchor: no 491 492 # enable to not set the User-Agent HTTP header. 493 # hide-http-user-agent: no 494 495 # the identity to report. Leave "" or default to return hostname. 496 # identity: "" 497 498 # the version to report. Leave "" or default to return package version. 499 # version: "" 500 501 # NSID identity (hex string, or "ascii_somestring"). default disabled. 502 # nsid: "aabbccdd" 503 504 # User-Agent HTTP header to use. Leave "" or default to use package name 505 # and version. 506 # http-user-agent: "" 507 508 # the target fetch policy. 509 # series of integers describing the policy per dependency depth. 510 # The number of values in the list determines the maximum dependency 511 # depth the recursor will pursue before giving up. Each integer means: 512 # -1 : fetch all targets opportunistically, 513 # 0: fetch on demand, 514 # positive value: fetch that many targets opportunistically. 515 # Enclose the list of numbers between quotes (""). 516 # target-fetch-policy: "3 2 1 0 0" 517 518 # Harden against very small EDNS buffer sizes. 519 # harden-short-bufsize: yes 520 521 # Harden against unseemly large queries. 522 # harden-large-queries: no 523 524 # Harden against out of zone rrsets, to avoid spoofing attempts. 525 # harden-glue: yes 526 527 # Harden against receiving dnssec-stripped data. If you turn it 528 # off, failing to validate dnskey data for a trustanchor will 529 # trigger insecure mode for that zone (like without a trustanchor). 530 # Default on, which insists on dnssec data for trust-anchored zones. 531 # harden-dnssec-stripped: yes 532 533 # Harden against queries that fall under dnssec-signed nxdomain names. 534 # harden-below-nxdomain: yes 535 536 # Harden the referral path by performing additional queries for 537 # infrastructure data. Validates the replies (if possible). 538 # Default off, because the lookups burden the server. Experimental 539 # implementation of draft-wijngaards-dnsext-resolver-side-mitigation. 540 # harden-referral-path: no 541 542 # Harden against algorithm downgrade when multiple algorithms are 543 # advertised in the DS record. If no, allows the weakest algorithm 544 # to validate the zone. 545 # harden-algo-downgrade: no 546 547 # Harden against unknown records in the authority section and the 548 # additional section. 549 # harden-unknown-additional: no 550 551 # Sent minimum amount of information to upstream servers to enhance 552 # privacy. Only sent minimum required labels of the QNAME and set QTYPE 553 # to A when possible. 554 # qname-minimisation: yes 555 556 # QNAME minimisation in strict mode. Do not fall-back to sending full 557 # QNAME to potentially broken nameservers. A lot of domains will not be 558 # resolvable when this option in enabled. 559 # This option only has effect when qname-minimisation is enabled. 560 # qname-minimisation-strict: no 561 562 # Aggressive NSEC uses the DNSSEC NSEC chain to synthesize NXDOMAIN 563 # and other denials, using information from previous NXDOMAINs answers. 564 # aggressive-nsec: yes 565 566 # Use 0x20-encoded random bits in the query to foil spoof attempts. 567 # This feature is an experimental implementation of draft dns-0x20. 568 # use-caps-for-id: no 569 570 # Domains (and domains in them) without support for dns-0x20 and 571 # the fallback fails because they keep sending different answers. 572 # caps-exempt: "licdn.com" 573 # caps-exempt: "senderbase.org" 574 575 # Enforce privacy of these addresses. Strips them away from answers. 576 # It may cause DNSSEC validation to additionally mark it as bogus. 577 # Protects against 'DNS Rebinding' (uses browser as network proxy). 578 # Only 'private-domain' and 'local-data' names are allowed to have 579 # these private addresses. No default. 580 # private-address: 10.0.0.0/8 581 # private-address: 172.16.0.0/12 582 # private-address: 192.168.0.0/16 583 # private-address: 169.254.0.0/16 584 # private-address: fd00::/8 585 # private-address: fe80::/10 586 # private-address: ::ffff:0:0/96 587 588 # Allow the domain (and its subdomains) to contain private addresses. 589 # local-data statements are allowed to contain private addresses too. 590 # private-domain: "example.com" 591 592 # If nonzero, unwanted replies are not only reported in statistics, 593 # but also a running total is kept per thread. If it reaches the 594 # threshold, a warning is printed and a defensive action is taken, 595 # the cache is cleared to flush potential poison out of it. 596 # A suggested value is 10000000, the default is 0 (turned off). 597 # unwanted-reply-threshold: 0 598 599 # Do not query the following addresses. No DNS queries are sent there. 600 # List one address per entry. List classless netblocks with /size, 601 # do-not-query-address: 127.0.0.1/8 602 # do-not-query-address: ::1 603 604 # if yes, the above default do-not-query-address entries are present. 605 # if no, localhost can be queried (for testing and debugging). 606 # do-not-query-localhost: yes 607 608 # if yes, perform prefetching of almost expired message cache entries. 609 # prefetch: no 610 611 # if yes, perform key lookups adjacent to normal lookups. 612 # prefetch-key: no 613 614 # deny queries of type ANY with an empty response. 615 # deny-any: no 616 617 # if yes, Unbound rotates RRSet order in response. 618 # rrset-roundrobin: yes 619 620 # if yes, Unbound doesn't insert authority/additional sections 621 # into response messages when those sections are not required. 622 # minimal-responses: yes 623 624 # true to disable DNSSEC lameness check in iterator. 625 # disable-dnssec-lame-check: no 626 627 # module configuration of the server. A string with identifiers 628 # separated by spaces. Syntax: "[dns64] [validator] iterator" 629 # most modules have to be listed at the beginning of the line, 630 # except cachedb(just before iterator), and python (at the beginning, 631 # or, just before the iterator). 632 # module-config: "validator iterator" 633 634 # File with trusted keys, kept uptodate using RFC5011 probes, 635 # initial file like trust-anchor-file, then it stores metadata. 636 # Use several entries, one per domain name, to track multiple zones. 637 # 638 # If you want to perform DNSSEC validation, run unbound-anchor before 639 # you start Unbound (i.e. in the system boot scripts). 640 # And then enable the auto-trust-anchor-file config item. 641 # Please note usage of unbound-anchor root anchor is at your own risk 642 # and under the terms of our LICENSE (see that file in the source). 643 # auto-trust-anchor-file: "@UNBOUND_ROOTKEY_FILE@" 644 645 # trust anchor signaling sends a RFC8145 key tag query after priming. 646 # trust-anchor-signaling: yes 647 648 # Root key trust anchor sentinel (draft-ietf-dnsop-kskroll-sentinel) 649 # root-key-sentinel: yes 650 651 # File with trusted keys for validation. Specify more than one file 652 # with several entries, one file per entry. 653 # Zone file format, with DS and DNSKEY entries. 654 # Note this gets out of date, use auto-trust-anchor-file please. 655 # trust-anchor-file: "" 656 657 # Trusted key for validation. DS or DNSKEY. specify the RR on a 658 # single line, surrounded by "". TTL is ignored. class is IN default. 659 # Note this gets out of date, use auto-trust-anchor-file please. 660 # (These examples are from August 2007 and may not be valid anymore). 661 # trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2BiVmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy32DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ==" 662 # trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A0BA4D17FA9B038BE4A" 663 664 # File with trusted keys for validation. Specify more than one file 665 # with several entries, one file per entry. Like trust-anchor-file 666 # but has a different file format. Format is BIND-9 style format, 667 # the trusted-keys { name flag proto algo "key"; }; clauses are read. 668 # you need external update procedures to track changes in keys. 669 # trusted-keys-file: "" 670 671 # Ignore chain of trust. Domain is treated as insecure. 672 # domain-insecure: "example.com" 673 674 # Override the date for validation with a specific fixed date. 675 # Do not set this unless you are debugging signature inception 676 # and expiration. "" or "0" turns the feature off. -1 ignores date. 677 # val-override-date: "" 678 679 # The time to live for bogus data, rrsets and messages. This avoids 680 # some of the revalidation, until the time interval expires. in secs. 681 # val-bogus-ttl: 60 682 683 # The signature inception and expiration dates are allowed to be off 684 # by 10% of the signature lifetime (expir-incep) from our local clock. 685 # This leeway is capped with a minimum and a maximum. In seconds. 686 # val-sig-skew-min: 3600 687 # val-sig-skew-max: 86400 688 689 # The maximum number the validator should restart validation with 690 # another authority in case of failed validation. 691 # val-max-restart: 5 692 693 # Should additional section of secure message also be kept clean of 694 # unsecure data. Useful to shield the users of this validator from 695 # potential bogus data in the additional section. All unsigned data 696 # in the additional section is removed from secure messages. 697 # val-clean-additional: yes 698 699 # Turn permissive mode on to permit bogus messages. Thus, messages 700 # for which security checks failed will be returned to clients, 701 # instead of SERVFAIL. It still performs the security checks, which 702 # result in interesting log files and possibly the AD bit in 703 # replies if the message is found secure. The default is off. 704 # val-permissive-mode: no 705 706 # Ignore the CD flag in incoming queries and refuse them bogus data. 707 # Enable it if the only clients of Unbound are legacy servers (w2008) 708 # that set CD but cannot validate themselves. 709 # ignore-cd-flag: no 710 711 # Disable the DO flag in outgoing requests. It is helpful for upstream 712 # devices that cannot handle DNSSEC information. But do not enable it 713 # otherwise, because it would stop DNSSEC validation. 714 # disable-edns-do: no 715 716 # Serve expired responses from cache, with serve-expired-reply-ttl in 717 # the response, and then attempt to fetch the data afresh. 718 # serve-expired: no 719 # 720 # Limit serving of expired responses to configured seconds after 721 # expiration. 0 disables the limit. 722 # serve-expired-ttl: 0 723 # 724 # Set the TTL of expired records to the serve-expired-ttl value after a 725 # failed attempt to retrieve the record from upstream. This makes sure 726 # that the expired records will be served as long as there are queries 727 # for it. 728 # serve-expired-ttl-reset: no 729 # 730 # TTL value to use when replying with expired data. 731 # serve-expired-reply-ttl: 30 732 # 733 # Time in milliseconds before replying to the client with expired data. 734 # This essentially enables the serve-stale behavior as specified in 735 # RFC 8767 that first tries to resolve before 736 # immediately responding with expired data. 0 disables this behavior. 737 # A recommended value is 1800. 738 # serve-expired-client-timeout: 0 739 740 # Return the original TTL as received from the upstream name server rather 741 # than the decrementing TTL as stored in the cache. Enabling this feature 742 # does not impact cache expiry, it only changes the TTL Unbound embeds in 743 # responses to queries. Note that enabling this feature implicitly disables 744 # enforcement of the configured minimum and maximum TTL. 745 # serve-original-ttl: no 746 747 # Have the validator log failed validations for your diagnosis. 748 # 0: off. 1: A line per failed user query. 2: With reason and bad IP. 749 # val-log-level: 0 750 751 # It is possible to configure NSEC3 maximum iteration counts per 752 # keysize. Keep this table very short, as linear search is done. 753 # A message with an NSEC3 with larger count is marked insecure. 754 # List in ascending order the keysize and count values. 755 # val-nsec3-keysize-iterations: "1024 150 2048 150 4096 150" 756 757 # if enabled, ZONEMD verification failures do not block the zone. 758 # zonemd-permissive-mode: no 759 760 # instruct the auto-trust-anchor-file probing to add anchors after ttl. 761 # add-holddown: 2592000 # 30 days 762 763 # instruct the auto-trust-anchor-file probing to del anchors after ttl. 764 # del-holddown: 2592000 # 30 days 765 766 # auto-trust-anchor-file probing removes missing anchors after ttl. 767 # If the value 0 is given, missing anchors are not removed. 768 # keep-missing: 31622400 # 366 days 769 770 # debug option that allows very small holddown times for key rollover, 771 # otherwise the RFC mandates probe intervals must be at least 1 hour. 772 # permit-small-holddown: no 773 774 # the amount of memory to use for the key cache. 775 # plain value in bytes or you can append k, m or G. default is "4Mb". 776 # key-cache-size: 4m 777 778 # the number of slabs to use for the key cache. 779 # the number of slabs must be a power of 2. 780 # more slabs reduce lock contention, but fragment memory usage. 781 # key-cache-slabs: 4 782 783 # the amount of memory to use for the negative cache. 784 # plain value in bytes or you can append k, m or G. default is "1Mb". 785 # neg-cache-size: 1m 786 787 # By default, for a number of zones a small default 'nothing here' 788 # reply is built-in. Query traffic is thus blocked. If you 789 # wish to serve such zone you can unblock them by uncommenting one 790 # of the nodefault statements below. 791 # You may also have to use domain-insecure: zone to make DNSSEC work, 792 # unless you have your own trust anchors for this zone. 793 # local-zone: "localhost." nodefault 794 # local-zone: "127.in-addr.arpa." nodefault 795 # 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 796 # local-zone: "home.arpa." nodefault 797 # local-zone: "onion." nodefault 798 # local-zone: "test." nodefault 799 # local-zone: "invalid." nodefault 800 # local-zone: "10.in-addr.arpa." nodefault 801 # local-zone: "16.172.in-addr.arpa." nodefault 802 # local-zone: "17.172.in-addr.arpa." nodefault 803 # local-zone: "18.172.in-addr.arpa." nodefault 804 # local-zone: "19.172.in-addr.arpa." nodefault 805 # local-zone: "20.172.in-addr.arpa." nodefault 806 # local-zone: "21.172.in-addr.arpa." nodefault 807 # local-zone: "22.172.in-addr.arpa." nodefault 808 # local-zone: "23.172.in-addr.arpa." nodefault 809 # local-zone: "24.172.in-addr.arpa." nodefault 810 # local-zone: "25.172.in-addr.arpa." nodefault 811 # local-zone: "26.172.in-addr.arpa." nodefault 812 # local-zone: "27.172.in-addr.arpa." nodefault 813 # local-zone: "28.172.in-addr.arpa." nodefault 814 # local-zone: "29.172.in-addr.arpa." nodefault 815 # local-zone: "30.172.in-addr.arpa." nodefault 816 # local-zone: "31.172.in-addr.arpa." nodefault 817 # local-zone: "168.192.in-addr.arpa." nodefault 818 # local-zone: "0.in-addr.arpa." nodefault 819 # local-zone: "254.169.in-addr.arpa." nodefault 820 # local-zone: "2.0.192.in-addr.arpa." nodefault 821 # local-zone: "100.51.198.in-addr.arpa." nodefault 822 # local-zone: "113.0.203.in-addr.arpa." nodefault 823 # local-zone: "255.255.255.255.in-addr.arpa." nodefault 824 # 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 825 # local-zone: "d.f.ip6.arpa." nodefault 826 # local-zone: "8.e.f.ip6.arpa." nodefault 827 # local-zone: "9.e.f.ip6.arpa." nodefault 828 # local-zone: "a.e.f.ip6.arpa." nodefault 829 # local-zone: "b.e.f.ip6.arpa." nodefault 830 # local-zone: "8.b.d.0.1.0.0.2.ip6.arpa." nodefault 831 # And for 64.100.in-addr.arpa. to 127.100.in-addr.arpa. 832 833 # Add example.com into ipset 834 # local-zone: "example.com" ipset 835 836 # If Unbound is running service for the local host then it is useful 837 # to perform lan-wide lookups to the upstream, and unblock the 838 # long list of local-zones above. If this Unbound is a dns server 839 # for a network of computers, disabled is better and stops information 840 # leakage of local lan information. 841 # unblock-lan-zones: no 842 843 # The insecure-lan-zones option disables validation for 844 # these zones, as if they were all listed as domain-insecure. 845 # insecure-lan-zones: no 846 847 # a number of locally served zones can be configured. 848 # local-zone: <zone> <type> 849 # local-data: "<resource record string>" 850 # o deny serves local data (if any), else, drops queries. 851 # o refuse serves local data (if any), else, replies with error. 852 # o static serves local data, else, nxdomain or nodata answer. 853 # o transparent gives local data, but resolves normally for other names 854 # o redirect serves the zone data for any subdomain in the zone. 855 # o nodefault can be used to normally resolve AS112 zones. 856 # o typetransparent resolves normally for other types and other names 857 # o inform acts like transparent, but logs client IP address 858 # o inform_deny drops queries and logs client IP address 859 # o inform_redirect redirects queries and logs client IP address 860 # o always_transparent, always_refuse, always_nxdomain, always_nodata, 861 # always_deny resolve in that way but ignore local data for 862 # that name 863 # o block_a resolves all records normally but returns 864 # NODATA for A queries and ignores local data for that name 865 # o always_null returns 0.0.0.0 or ::0 for any name in the zone. 866 # o noview breaks out of that view towards global local-zones. 867 # 868 # defaults are localhost address, reverse for 127.0.0.1 and ::1 869 # and nxdomain for AS112 zones. If you configure one of these zones 870 # the default content is omitted, or you can omit it with 'nodefault'. 871 # 872 # If you configure local-data without specifying local-zone, by 873 # default a transparent local-zone is created for the data. 874 # 875 # You can add locally served data with 876 # local-zone: "local." static 877 # local-data: "mycomputer.local. IN A 192.0.2.51" 878 # local-data: 'mytext.local TXT "content of text record"' 879 # 880 # You can override certain queries with 881 # local-data: "adserver.example.com A 127.0.0.1" 882 # 883 # You can redirect a domain to a fixed address with 884 # (this makes example.com, www.example.com, etc, all go to 192.0.2.3) 885 # local-zone: "example.com" redirect 886 # local-data: "example.com A 192.0.2.3" 887 # 888 # Shorthand to make PTR records, "IPv4 name" or "IPv6 name". 889 # You can also add PTR records using local-data directly, but then 890 # you need to do the reverse notation yourself. 891 # local-data-ptr: "192.0.2.3 www.example.com" 892 893 # tag a localzone with a list of tag names (in "" with spaces between) 894 # local-zone-tag: "example.com" "tag2 tag3" 895 896 # add a netblock specific override to a localzone, with zone type 897 # local-zone-override: "example.com" 192.0.2.0/24 refuse 898 899 # service clients over TLS (on the TCP sockets) with plain DNS inside 900 # the TLS stream, and over HTTPS using HTTP/2 as specified in RFC8484. 901 # Give the certificate to use and private key. 902 # default is "" (disabled). requires restart to take effect. 903 # tls-service-key: "path/to/privatekeyfile.key" 904 # tls-service-pem: "path/to/publiccertfile.pem" 905 # tls-port: 853 906 # https-port: 443 907 908 # cipher setting for TLSv1.2 909 # 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" 910 # cipher setting for TLSv1.3 911 # 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" 912 913 # Pad responses to padded queries received over TLS 914 # pad-responses: yes 915 916 # Padded responses will be padded to the closest multiple of this size. 917 # pad-responses-block-size: 468 918 919 # Use the SNI extension for TLS connections. Default is yes. 920 # Changing the value requires a reload. 921 # tls-use-sni: yes 922 923 # Add the secret file for TLS Session Ticket. 924 # Secret file must be 80 bytes of random data. 925 # First key use to encrypt and decrypt TLS session tickets. 926 # Other keys use to decrypt only. 927 # requires restart to take effect. 928 # tls-session-ticket-keys: "path/to/secret_file1" 929 # tls-session-ticket-keys: "path/to/secret_file2" 930 931 # request upstream over TLS (with plain DNS inside the TLS stream). 932 # Default is no. Can be turned on and off with unbound-control. 933 # tls-upstream: no 934 935 # Certificates used to authenticate connections made upstream. 936 # tls-cert-bundle: "" 937 938 # Add system certs to the cert bundle, from the Windows Cert Store 939 # tls-win-cert: no 940 # and on other systems, the default openssl certificates 941 # tls-system-cert: no 942 943 # Pad queries over TLS upstreams 944 # pad-queries: yes 945 946 # Padded queries will be padded to the closest multiple of this size. 947 # pad-queries-block-size: 128 948 949 # Also serve tls on these port numbers (eg. 443, ...), by listing 950 # tls-additional-port: portno for each of the port numbers. 951 952 # HTTP endpoint to provide DNS-over-HTTPS service on. 953 # http-endpoint: "/dns-query" 954 955 # HTTP/2 SETTINGS_MAX_CONCURRENT_STREAMS value to use. 956 # http-max-streams: 100 957 958 # Maximum number of bytes used for all HTTP/2 query buffers. 959 # http-query-buffer-size: 4m 960 961 # Maximum number of bytes used for all HTTP/2 response buffers. 962 # http-response-buffer-size: 4m 963 964 # Set TCP_NODELAY socket option on sockets used for DNS-over-HTTPS 965 # service. 966 # http-nodelay: yes 967 968 # Disable TLS for DNS-over-HTTP downstream service. 969 # http-notls-downstream: no 970 971 # The interfaces that use these listed port numbers will support and 972 # expect PROXYv2. For UDP and TCP/TLS interfaces. 973 # proxy-protocol-port: portno for each of the port numbers. 974 975 # DNS64 prefix. Must be specified when DNS64 is use. 976 # Enable dns64 in module-config. Used to synthesize IPv6 from IPv4. 977 # dns64-prefix: 64:ff9b::0/96 978 979 # DNS64 ignore AAAA records for these domains and use A instead. 980 # dns64-ignore-aaaa: "example.com" 981 982 # ratelimit for uncached, new queries, this limits recursion effort. 983 # ratelimiting is experimental, and may help against randomqueryflood. 984 # if 0(default) it is disabled, otherwise state qps allowed per zone. 985 # ratelimit: 0 986 987 # ratelimits are tracked in a cache, size in bytes of cache (or k,m). 988 # ratelimit-size: 4m 989 # ratelimit cache slabs, reduces lock contention if equal to cpucount. 990 # ratelimit-slabs: 4 991 992 # 0 blocks when ratelimited, otherwise let 1/xth traffic through 993 # ratelimit-factor: 10 994 995 # Aggressive rate limit when the limit is reached and until demand has 996 # decreased in a 2 second rate window. 997 # ratelimit-backoff: no 998 999 # override the ratelimit for a specific domain name. 1000 # give this setting multiple times to have multiple overrides. 1001 # ratelimit-for-domain: example.com 1000 1002 # override the ratelimits for all domains below a domain name 1003 # can give this multiple times, the name closest to the zone is used. 1004 # ratelimit-below-domain: com 1000 1005 1006 # global query ratelimit for all ip addresses. 1007 # feature is experimental. 1008 # if 0(default) it is disabled, otherwise states qps allowed per ip address 1009 # ip-ratelimit: 0 1010 1011 # global query ratelimit for all ip addresses with a valid DNS Cookie. 1012 # feature is experimental. 1013 # if 0(default) it is disabled, otherwise states qps allowed per ip address 1014 # useful in combination with 'allow_cookie'. 1015 # If used, suggested to be higher than ip-ratelimit, tenfold. 1016 # ip-ratelimit-cookie: 0 1017 1018 # ip ratelimits are tracked in a cache, size in bytes of cache (or k,m). 1019 # ip-ratelimit-size: 4m 1020 # ip ratelimit cache slabs, reduces lock contention if equal to cpucount. 1021 # ip-ratelimit-slabs: 4 1022 1023 # 0 blocks when ip is ratelimited, otherwise let 1/xth traffic through 1024 # ip-ratelimit-factor: 10 1025 1026 # Aggressive rate limit when the limit is reached and until demand has 1027 # decreased in a 2 second rate window. 1028 # ip-ratelimit-backoff: no 1029 1030 # Limit the number of connections simultaneous from a netblock 1031 # tcp-connection-limit: 192.0.2.0/24 12 1032 1033 # select from the fastest servers this many times out of 1000. 0 means 1034 # the fast server select is disabled. prefetches are not sped up. 1035 # fast-server-permil: 0 1036 # the number of servers that will be used in the fast server selection. 1037 # fast-server-num: 3 1038 1039 # reply to requests containing DNS Cookies as specified in RFC 7873 and RFC 9018. 1040 # answer-cookie: no 1041 1042 # secret for DNS Cookie generation. 1043 # useful for anycast deployments. 1044 # example value "000102030405060708090a0b0c0d0e0f". 1045 # cookie-secret: <128 bit random hex string> 1046 1047 # File with cookie secrets, the 'cookie-secret:' option is ignored 1048 # and the file can be managed to have staging and active secrets 1049 # with remote control commands. Disabled with "". Default is "". 1050 # cookie-secret-file: "/usr/local/etc/unbound_cookiesecrets.txt" 1051 1052 # Enable to attach Extended DNS Error codes (RFC8914) to responses. 1053 # ede: no 1054 1055 # Enable to attach an Extended DNS Error (RFC8914) Code 3 - Stale 1056 # Answer as EDNS0 option to expired responses. 1057 # Note that the ede option above needs to be enabled for this to work. 1058 # ede-serve-expired: no 1059 1060 # Specific options for ipsecmod. Unbound needs to be configured with 1061 # --enable-ipsecmod for these to take effect. 1062 # 1063 # Enable or disable ipsecmod (it still needs to be defined in 1064 # module-config above). Can be used when ipsecmod needs to be 1065 # enabled/disabled via remote-control(below). 1066 # ipsecmod-enabled: yes 1067 # 1068 # Path to executable external hook. It must be defined when ipsecmod is 1069 # listed in module-config (above). 1070 # ipsecmod-hook: "./my_executable" 1071 # 1072 # When enabled Unbound will reply with SERVFAIL if the return value of 1073 # the ipsecmod-hook is not 0. 1074 # ipsecmod-strict: no 1075 # 1076 # Maximum time to live (TTL) for cached A/AAAA records with IPSECKEY. 1077 # ipsecmod-max-ttl: 3600 1078 # 1079 # Reply with A/AAAA even if the relevant IPSECKEY is bogus. Mainly used for 1080 # testing. 1081 # ipsecmod-ignore-bogus: no 1082 # 1083 # Domains for which ipsecmod will be triggered. If not defined (default) 1084 # all domains are treated as being allowed. 1085 # ipsecmod-allow: "example.com" 1086 # ipsecmod-allow: "nlnetlabs.nl" 1087 1088 # Timeout for REUSE entries in milliseconds. 1089 # tcp-reuse-timeout: 60000 1090 # Max number of queries on a reuse connection. 1091 # max-reuse-tcp-queries: 200 1092 # Timeout in milliseconds for TCP queries to auth servers. 1093 # tcp-auth-query-timeout: 3000 1094 1095 1096# Python config section. To enable: 1097# o use --with-pythonmodule to configure before compiling. 1098# o list python in the module-config string (above) to enable. 1099# It can be at the start, it gets validated results, or just before 1100# the iterator and process before DNSSEC validation. 1101# o and give a python-script to run. 1102python: 1103 # Script file to load 1104 # python-script: "@UNBOUND_SHARE_DIR@/ubmodule-tst.py" 1105 1106# Dynamic library config section. To enable: 1107# o use --with-dynlibmodule to configure before compiling. 1108# o list dynlib in the module-config string (above) to enable. 1109# It can be placed anywhere, the dynlib module is only a very thin wrapper 1110# to load modules dynamically. 1111# o and give a dynlib-file to run. If more than one dynlib entry is listed in 1112# the module-config then you need one dynlib-file per instance. 1113dynlib: 1114 # Script file to load 1115 # dynlib-file: "@UNBOUND_SHARE_DIR@/dynlib.so" 1116 1117# Remote control config section. 1118remote-control: 1119 # Enable remote control with unbound-control(8) here. 1120 # set up the keys and certificates with unbound-control-setup. 1121 # control-enable: no 1122 1123 # what interfaces are listened to for remote control. 1124 # give 0.0.0.0 and ::0 to listen to all interfaces. 1125 # set to an absolute path to use a unix local name pipe, certificates 1126 # are not used for that, so key and cert files need not be present. 1127 # control-interface: 127.0.0.1 1128 # control-interface: ::1 1129 1130 # port number for remote control operations. 1131 # control-port: 8953 1132 1133 # for localhost, you can disable use of TLS by setting this to "no" 1134 # For local sockets this option is ignored, and TLS is not used. 1135 # control-use-cert: "yes" 1136 1137 # Unbound server key file. 1138 # server-key-file: "@UNBOUND_RUN_DIR@/unbound_server.key" 1139 1140 # Unbound server certificate file. 1141 # server-cert-file: "@UNBOUND_RUN_DIR@/unbound_server.pem" 1142 1143 # unbound-control key file. 1144 # control-key-file: "@UNBOUND_RUN_DIR@/unbound_control.key" 1145 1146 # unbound-control certificate file. 1147 # control-cert-file: "@UNBOUND_RUN_DIR@/unbound_control.pem" 1148 1149# Stub zones. 1150# Create entries like below, to make all queries for 'example.com' and 1151# 'example.org' go to the given list of nameservers. list zero or more 1152# nameservers by hostname or by ipaddress. If you set stub-prime to yes, 1153# the list is treated as priming hints (default is no). 1154# With stub-first yes, it attempts without the stub if it fails. 1155# Consider adding domain-insecure: name and local-zone: name nodefault 1156# to the server: section if the stub is a locally served zone. 1157# stub-zone: 1158# name: "example.com" 1159# stub-addr: 192.0.2.68 1160# stub-prime: no 1161# stub-first: no 1162# stub-tcp-upstream: no 1163# stub-tls-upstream: no 1164# stub-no-cache: no 1165# stub-zone: 1166# name: "example.org" 1167# stub-host: ns.example.com. 1168 1169# Forward zones 1170# Create entries like below, to make all queries for 'example.com' and 1171# 'example.org' go to the given list of servers. These servers have to handle 1172# recursion to other nameservers. List zero or more nameservers by hostname 1173# or by ipaddress. Use an entry with name "." to forward all queries. 1174# If you enable forward-first, it attempts without the forward if it fails. 1175# forward-zone: 1176# name: "example.com" 1177# forward-addr: 192.0.2.68 1178# forward-addr: 192.0.2.73@5355 # forward to port 5355. 1179# forward-first: no 1180# forward-tcp-upstream: no 1181# forward-tls-upstream: no 1182# forward-no-cache: no 1183# forward-zone: 1184# name: "example.org" 1185# forward-host: fwd.example.com 1186 1187# Authority zones 1188# The data for these zones is kept locally, from a file or downloaded. 1189# The data can be served to downstream clients, or used instead of the 1190# upstream (which saves a lookup to the upstream). The first example 1191# has a copy of the root for local usage. The second serves example.org 1192# authoritatively. zonefile: reads from file (and writes to it if you also 1193# download it), primary: fetches with AXFR and IXFR, or url to zonefile. 1194# With allow-notify: you can give additional (apart from primaries and urls) 1195# sources of notifies. 1196# auth-zone: 1197# name: "." 1198# primary: 170.247.170.2 # b.root-servers.net 1199# primary: 192.33.4.12 # c.root-servers.net 1200# primary: 199.7.91.13 # d.root-servers.net 1201# primary: 192.5.5.241 # f.root-servers.net 1202# primary: 192.112.36.4 # g.root-servers.net 1203# primary: 193.0.14.129 # k.root-servers.net 1204# primary: 192.0.47.132 # xfr.cjr.dns.icann.org 1205# primary: 192.0.32.132 # xfr.lax.dns.icann.org 1206# primary: 2801:1b8:10::b # b.root-servers.net 1207# primary: 2001:500:2::c # c.root-servers.net 1208# primary: 2001:500:2d::d # d.root-servers.net 1209# primary: 2001:500:2f::f # f.root-servers.net 1210# primary: 2001:500:12::d0d # g.root-servers.net 1211# primary: 2001:7fd::1 # k.root-servers.net 1212# primary: 2620:0:2830:202::132 # xfr.cjr.dns.icann.org 1213# primary: 2620:0:2d0:202::132 # xfr.lax.dns.icann.org 1214# fallback-enabled: yes 1215# for-downstream: no 1216# for-upstream: yes 1217# auth-zone: 1218# name: "example.org" 1219# for-downstream: yes 1220# for-upstream: yes 1221# zonemd-check: no 1222# zonemd-reject-absence: no 1223# zonefile: "example.org.zone" 1224 1225# Views 1226# Create named views. Name must be unique. Map views to requests using 1227# the access-control-view option. Views can contain zero or more local-zone 1228# and local-data options. Options from matching views will override global 1229# options. Global options will be used if no matching view is found. 1230# With view-first yes, it will try to answer using the global local-zone and 1231# local-data elements if there is no view specific match. 1232# view: 1233# name: "viewname" 1234# local-zone: "example.com" redirect 1235# local-data: "example.com A 192.0.2.3" 1236# local-data-ptr: "192.0.2.3 www.example.com" 1237# view-first: no 1238# view: 1239# name: "anotherview" 1240# local-zone: "example.com" refuse 1241 1242# DNSCrypt 1243# To enable, use --enable-dnscrypt to configure before compiling. 1244# Caveats: 1245# 1. the keys/certs cannot be produced by Unbound. You can use dnscrypt-wrapper 1246# for this: https://github.com/cofyc/dnscrypt-wrapper/blob/master/README.md#usage 1247# 2. dnscrypt channel attaches to an interface. you MUST set interfaces to 1248# listen on `dnscrypt-port` with the follo0wing snippet: 1249# server: 1250# interface: 0.0.0.0@443 1251# interface: ::0@443 1252# 1253# Finally, `dnscrypt` config has its own section. 1254# dnscrypt: 1255# dnscrypt-enable: yes 1256# dnscrypt-port: 443 1257# dnscrypt-provider: 2.dnscrypt-cert.example.com. 1258# dnscrypt-secret-key: /path/unbound-conf/keys1/1.key 1259# dnscrypt-secret-key: /path/unbound-conf/keys2/1.key 1260# dnscrypt-provider-cert: /path/unbound-conf/keys1/1.cert 1261# dnscrypt-provider-cert: /path/unbound-conf/keys2/1.cert 1262 1263# CacheDB 1264# External backend DB as auxiliary cache. 1265# To enable, use --enable-cachedb to configure before compiling. 1266# Specify the backend name 1267# (default is "testframe", which has no use other than for debugging and 1268# testing) and backend-specific options. The 'cachedb' module must be 1269# included in module-config, just before the iterator module. 1270# cachedb: 1271# backend: "testframe" 1272# # secret seed string to calculate hashed keys 1273# secret-seed: "default" 1274# # if the backend should be read from, but not written to. 1275# cachedb-no-store: no 1276# # if the cachedb should be checked before a serve-expired response is 1277# # given, when serve-expired is enabled. 1278# cachedb-check-when-serve-expired: yes 1279# 1280# # For "redis" backend: 1281# # (to enable, use --with-libhiredis to configure before compiling) 1282# # redis server's IP address or host name 1283# redis-server-host: 127.0.0.1 1284# # redis server's TCP port 1285# redis-server-port: 6379 1286# # if the server uses a unix socket, set its path, or "" when not used. 1287# # redis-server-path: "/var/lib/redis/redis-server.sock" 1288# # if the server uses an AUTH password, specify here, or "" when not used. 1289# # redis-server-password: "" 1290# # timeout (in ms) for communication with the redis server 1291# redis-timeout: 100 1292# # set timeout on redis records based on DNS response TTL 1293# redis-expire-records: no 1294# # redis logical database to use, 0 is the default database. 1295# redis-logical-db: 0 1296 1297# IPSet 1298# Add specify domain into set via ipset. 1299# To enable: 1300# o use --enable-ipset to configure before compiling; 1301# o Unbound then needs to run as root user. 1302# ipset: 1303# # set name for ip v4 addresses 1304# name-v4: "list-v4" 1305# # set name for ip v6 addresses 1306# name-v6: "list-v6" 1307# 1308 1309# Dnstap logging support, if compiled in by using --enable-dnstap to configure. 1310# To enable, set the dnstap-enable to yes and also some of 1311# dnstap-log-..-messages to yes. And select an upstream log destination, by 1312# socket path, TCP or TLS destination. 1313# dnstap: 1314# dnstap-enable: no 1315# # if set to yes frame streams will be used in bidirectional mode 1316# dnstap-bidirectional: yes 1317# dnstap-socket-path: "@DNSTAP_SOCKET_PATH@" 1318# # if "" use the unix socket in dnstap-socket-path, otherwise, 1319# # set it to "IPaddress[@port]" of the destination. 1320# dnstap-ip: "" 1321# # if set to yes if you want to use TLS to dnstap-ip, no for TCP. 1322# dnstap-tls: yes 1323# # name for authenticating the upstream server. or "" disabled. 1324# dnstap-tls-server-name: "" 1325# # if "", it uses the cert bundle from the main Unbound config. 1326# dnstap-tls-cert-bundle: "" 1327# # key file for client authentication, or "" disabled. 1328# dnstap-tls-client-key-file: "" 1329# # cert file for client authentication, or "" disabled. 1330# dnstap-tls-client-cert-file: "" 1331# dnstap-send-identity: no 1332# dnstap-send-version: no 1333# # if "" it uses the hostname. 1334# dnstap-identity: "" 1335# # if "" it uses the package version. 1336# dnstap-version: "" 1337# # log only 1/N messages, if 0 it is disabled. default 0. 1338# dnstap-sample-rate: 0 1339# dnstap-log-resolver-query-messages: no 1340# dnstap-log-resolver-response-messages: no 1341# dnstap-log-client-query-messages: no 1342# dnstap-log-client-response-messages: no 1343# dnstap-log-forwarder-query-messages: no 1344# dnstap-log-forwarder-response-messages: no 1345 1346# Response Policy Zones 1347# RPZ policies. Applied in order of configuration. Any match from an earlier 1348# RPZ zone will terminate the RPZ lookup. QNAME, Response IP 1349# Address, nsdname, nsip and clientip triggers are supported. Supported 1350# actions are: NXDOMAIN, NODATA, PASSTHRU, DROP, Local Data, tcp-only 1351# and drop. Policies can be loaded from a file, or using zone 1352# transfer, or using HTTP. The respip module needs to be added 1353# to the module-config, e.g.: module-config: "respip validator iterator". 1354# rpz: 1355# name: "rpz.example.com" 1356# zonefile: "rpz.example.com" 1357# primary: 192.0.2.0 1358# allow-notify: 192.0.2.0/32 1359# url: http://www.example.com/rpz.example.org.zone 1360# rpz-action-override: cname 1361# rpz-cname-override: www.example.org 1362# rpz-log: yes 1363# rpz-log-name: "example policy" 1364# rpz-signal-nxdomain-ra: no 1365# for-downstream: no 1366# tags: "example" 1367