### Rozhuk Ivan, 2011.03 - 2017 ### unbound.conf ### http://www.unbound.net/documentation/unbound.conf.html #Use this to include other text into the file. #include: "otherfile.conf" # The server clause sets the main parameters. server: ### NETWORK settings # port to answer queries from port: 53 # service clients over SSL (on the TCP sockets), with plain DNS inside # the SSL stream. Give the certificate to use and private key. # default is "" (disabled). requires restart to take effect. # ssl-port: 443 # ssl-service-key: "path/to/privatekeyfile.key" # ssl-service-pem: "path/to/publiccertfile.pem" # on Linux(3.9+) use SO_REUSEPORT to distribute queries over threads. so-reuseport: yes # specify the interfaces to answer queries from by ip-address. # The default is to listen to localhost (127.0.0.1 and ::1). # specify 0.0.0.0 and ::0 to bind to all available interfaces. # specify every interface[@port] on a new 'interface:' labelled line. # The listen interfaces are not changed on reload, only on restart. #interface: 192.0.2.154@5003 #interface: 2001:DB8::5 interface: 0.0.0.0 #interface: 0.0.0.0@443 #interface: 127.0.0.1 interface: ::0 #interface: ::1 # enable this feature to copy the source address of queries to reply. # Socket options are not supported on all platforms. experimental. interface-automatic: no # specify the interfaces to send outgoing queries to authoritative # server from by ip-address. If none, the default (all) interface # is used. Specify every interface on a 'outgoing-interface:' line. #outgoing-interface: 192.0.2.153 #outgoing-interface: 2001:DB8::5 # number of ports to allocate per thread, determines the size of the # port range that can be open simultaneously. About double the # num-queries-per-thread, or, use as many as the OS will allow you. outgoing-range: 32 # permit unbound to use this port number or port range for # making outgoing queries, using an outgoing interface. # Give a port number or a range of the form "low-high", without spaces outgoing-port-permit: "16384-65535" # deny unbound the use this of port number or port range for # making outgoing queries, using an outgoing interface. # Use this to make sure unbound does not grab a UDP port that some # other server on this computer needs. The default is to avoid # IANA-assigned port numbers. #outgoing-port-avoid: "3200-3208" # number of outgoing simultaneous tcp buffers to hold per thread. outgoing-num-tcp: 32 # number of incoming simultaneous tcp buffers to hold per thread. incoming-num-tcp: 32 # buffer size for UDP port 53 incoming (SO_RCVBUF socket option). # 0 is system default. Use 4m to catch query spikes for busy servers. so-rcvbuf: 512k # buffer size for UDP port 53 outgoing (SO_SNDBUF socket option). # 0 is system default. Use 4m to handle spikes on very busy servers. so-sndbuf: 512k # Maximum UDP response size (not applied to TCP response). # Suggested values are 512 to 4096. Default is 4096. 65536 disables it. max-udp-size: 65536 # buffer size for handling DNS data. No messages larger than this # size can be sent or received, by UDP or TCP. In bytes. msg-buffer-size: 65552 # EDNS reassembly buffer to advertise to UDP peers (the actual buffer # is set with msg-buffer-size). 1480 can solve fragmentation (timeouts). edns-buffer-size: 16384 # Enable IPv4, "yes" or "no". do-ip4: yes # Enable IPv6, "yes" or "no". do-ip6: yes # Enable UDP, "yes" or "no". do-udp: yes # Enable TCP, "yes" or "no". do-tcp: yes # upstream connections use TCP only (and no UDP), "yes" or "no" # useful for tunneling scenarios, default no. tcp-upstream: no # request upstream over SSL (with plain DNS inside the SSL stream). # Default is no. Can be turned on and off with unbound-control. ssl-upstream: no # msec to wait before close of port on timeout UDP. 0 disables. delay-close: 0 ### SYSTEM # number of threads to create. 1 disables threading. num-threads: 4 # the number of queries that a thread gets to service. num-queries-per-thread: 65535 # if very busy, 50% queries run to completion, 50% get timeout in msec jostle-timeout: 200 # Detach from the terminal, run in background, "yes" or "no". do-daemonize: yes # the pid file. Can be an absolute path outside of chroot/work dir. pidfile: "/var/run/unbound.pid" # if given, a chroot(2) is done to the given directory. # i.e. you can chroot to the working directory, for example, # for extra security, but make sure all files are in that directory. # # If chroot is enabled, you should pass the configfile (from the # commandline) as a full path from the original root. After the # chroot has been performed the now defunct portion of the config # file path is removed to be able to reread the config after a reload. # # All other file paths (working dir, logfile, roothints, and # key files) can be specified in several ways: # o as an absolute path relative to the new root. # o as a relative path to the working directory. # o as an absolute path relative to the original root. # In the last case the path is adjusted to remove the unused portion. # # The pid file can be absolute and outside of the chroot, it is # written just prior to performing the chroot and dropping permissions. # # Additionally, unbound may need to access /dev/random (for entropy). # How to do this is specific to your OS. # # If you give "" no chroot is performed. The path must not end in a /. # chroot: "/usr/local/etc/unbound" # if given, user privileges are dropped (after binding port), # and the given username is assumed. Default is user "unbound". # If you give "" no privileges are dropped. username: "unbound" # the working directory. The relative files in this config are # relative to this directory. If you give "" the working directory # is not changed. directory: "/usr/local/etc/unbound" # module configuration of the server. A string with identifiers # separated by spaces. "iterator" or "validator iterator" module-config: "iterator" ### CACHE # the amount of memory to use for the message cache. # plain value in bytes or you can append k, m or G. default is "4Mb". msg-cache-size: 32m # the number of slabs to use for the message cache. # the number of slabs must be a power of 2. # more slabs reduce lock contention, but fragment memory usage. msg-cache-slabs: 256 # the amount of memory to use for the RRset cache. # plain value in bytes or you can append k, m or G. default is "4Mb". rrset-cache-size: 32m # the number of slabs to use for the RRset cache. # the number of slabs must be a power of 2. # more slabs reduce lock contention, but fragment memory usage. rrset-cache-slabs: 256 # the time to live (TTL) value lower bound, in seconds. Default 0. # If more than an hour could easily give trouble due to stale data. cache-min-ttl: 0 # the time to live (TTL) value cap for RRsets and messages in the # cache. Items are not cached for longer. In seconds. cache-max-ttl: 86400 # the time to live (TTL) value for cached roundtrip times and # EDNS version information for hosts. In seconds. infra-host-ttl: 600 # the number of slabs to use for the Infrastructure cache. # the number of slabs must be a power of 2. # more slabs reduce lock contention, but fragment memory usage. infra-cache-slabs: 256 # the maximum number of hosts that are cached (roundtrip times, EDNS). infra-cache-numhosts: 16384 # [DNSSEC] the amount of memory to use for the key cache. # plain value in bytes or you can append k, m or G. default is "4Mb". key-cache-size: 32m # [DNSSEC] the number of slabs to use for the key cache. # the number of slabs must be a power of 2. # more slabs reduce lock contention, but fragment memory usage. key-cache-slabs: 32 # [DNSSEC] the amount of memory to use for the negative cache (used for DLV (DNSSEC Lookaside Validation)). # plain value in bytes or you can append k, m or G. default is "1Mb". neg-cache-size: 16m # if yes, perform prefetching of almost expired message cache entries. prefetch: yes # [DNSSEC] if yes, perform key lookups adjacent to normal lookups. prefetch-key: no # if yes, Unbound rotates RRSet order in response. rrset-roundrobin: yes # if yes, Unbound doesn't insert authority/additional sections # into response messages when those sections are not required. minimal-responses: no ### SECURITY # control which clients are allowed to make (recursive) queries # to this server. Specify classless netblocks with /size and action. # By default everything is refused, except for localhost. # Choose deny (drop message), refuse (polite error reply), # allow (recursive ok), allow_snoop (recursive and nonrecursive ok) # access-control: 0.0.0.0/0 refuse # access-control: ::0/0 refuse # access-control: ::ffff:127.0.0.1 allow access-control: 127.0.0.0/8 allow_snoop access-control: ::1 allow_snoop access-control: 10.0.0.0/8 allow_snoop access-control: 172.16.0.0/12 allow_snoop access-control: 192.168.0.0/16 allow_snoop access-control: fd00::/8 allow_snoop access-control: fe80::/10 allow_snoop # Enforce privacy of these addresses. Strips them away from answers. # It may cause DNSSEC validation to additionally mark it as bogus. # Protects against 'DNS Rebinding' (uses browser as network proxy). # Only 'private-domain' and 'local-data' names are allowed to have # these private addresses. No default. private-address: 10.0.0.0/8 private-address: 127.0.0.0/8 private-address: 169.254.0.0/16 private-address: 172.16.0.0/12 private-address: 192.168.0.0/16 private-address: fd00::/8 private-address: fe80::/10 # Allow the domain (and its subdomains) to contain private addresses. # local-data statements are allowed to contain private addresses too. #private-domain: "example.com" # enable to not answer id.server and hostname.bind queries. hide-identity: yes # enable to not answer version.server and version.bind queries. hide-version: yes # the identity to report. Leave "" or default to return hostname. identity: "" # the version to report. Leave "" or default to return package version. version: "" ### ITERATOR (resolver) # file to read root hints from. # get one from ftp://FTP.INTERNIC.NET/domain/named.cache # fetch ftp://FTP.INTERNIC.NET/domain/named.cache -o /usr/local/etc/unbound/named.cache root-hints: "/usr/local/etc/unbound/named.cache" # the target fetch policy. # series of integers describing the policy per dependency depth. # The number of values in the list determines the maximum dependency # depth the recursor will pursue before giving up. Each integer means: # -1 : fetch all targets opportunistically, # 0: fetch on demand, # positive value: fetch that many targets opportunistically. # Enclose the list of numbers between quotes (""). # default is "3 2 1 0 0"; BIND 9: "0 0 0 0 0"; BIND 8: "-1 -1 -1 -1 -1" target-fetch-policy: "-1 -1 -1 -1 -1" # Harden against very small EDNS buffer sizes. # Very small EDNS buffer sizes from queries are ignored. Default is off harden-short-bufsize: no # Harden against unseemly large queries. harden-large-queries: no # Harden against out of zone rrsets, to avoid spoofing attempts. harden-glue: yes # [DNSSEC] Harden against receiving dnssec-stripped data. If you turn it # off, failing to validate dnskey data for a trustanchor will # trigger insecure mode for that zone (like without a trustanchor). # Default on, which insists on dnssec data for trust-anchored zones. harden-dnssec-stripped: yes # Harden against queries that fall under known nxdomain names. # Default off because very old software can be incompatible. harden-below-nxdomain: no # Harden the referral path by performing additional queries for # infrastructure data. Validates the replies (if possible). # Default off, because the lookups burden the server. Experimental # implementation of draft-wijngaards-dnsext-resolver-side-mitigation. harden-referral-path: no # Use 0x20-encoded random bits in the query to foil spoof attempts. # This feature is an experimental implementation of draft dns-0x20. use-caps-for-id: no # Send minimum amount of information to upstream servers to # enhance privacy. Only sent minimum required labels of the QNAME # and set QTYPE to NS when possible. Best effort approach, full # QNAME and original QTYPE will be sent when upstream replies with # a RCODE other than NOERROR. # off: http://mosgu.ru/raspisanie/perscab/?F=5 # off: https://my.mail.ru qname-minimisation: no # QNAME minimisation in strict mode. Do not fall-back to sending # full QNAME to potentially broken nameservers. A lot of domains # will not be resolvable when this option in enabled. Only use if # you know what you are doing. This option only has effect when # qname-minimisation is enabled. Default is off. qname-minimisation-strict: no # If nonzero, unwanted replies are not only reported in statistics, # but also a running total is kept per thread. If it reaches the # threshold, a warning is printed and a defensive action is taken, # the cache is cleared to flush potential poison out of it. # A suggested value is 10000000, the default is 0 (turned off). unwanted-reply-threshold: 0 # Do not query the following addresses. No DNS queries are sent there. # List one address per entry. List classless netblocks with /size, #do-not-query-address: 127.0.0.1/8 #do-not-query-address: ::1 # if yes, the above default do-not-query-address entries are present. # if no, localhost can be queried (for testing and debugging). do-not-query-localhost: yes # Ignore the CD flag in incoming queries and refuse them bogus data. # Enable it if the only clients of unbound are legacy servers (w2008) # that set CD but cannot validate themselves. ignore-cd-flag: yes ### VALIDATOR (DNSSEC) # File with trusted keys for validation. Specify more than one file # with several entries, one file per entry. # Zone file format, with DS and DNSKEY entries. # Note this gets out of date, use auto-trust-anchor-file please. #trust-anchor-file: "" # File with trusted keys, kept uptodate using RFC5011 probes, # initial file like trust-anchor-file, then it stores metadata. # Use several entries, one per domain name, to track multiple zones. # # If you want to perform DNSSEC validation, run unbound-anchor before # you start unbound (i.e. in the system boot scripts). And enable: #auto-trust-anchor-file: "/usr/local/etc/unbound/root.key" # Trusted key for validation. DS or DNSKEY. specify the RR on a # single line, surrounded by "". TTL is ignored. class is IN default. # Note this gets out of date, use auto-trust-anchor-file please. # (These examples are from August 2007 and may not be valid anymore). #trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2BiVmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy32DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ==" #trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A0BA4D17FA9B038BE4A" # File with trusted keys for validation. Specify more than one file # with several entries, one file per entry. Like trust-anchor-file # but has a different file format. Format is BIND-9 style format, # the trusted-keys { name flag proto algo "key"; }; clauses are read. # you need external update procedures to track changes in keys. #trusted-keys-file: "" # File with DLV (DNSSEC Lookaside Validation) trusted keys. Same format as trust-anchor-file. # There can be only one DLV (DNSSEC Lookaside Validation) configured, it is trusted from root down. # Download http://ftp.isc.org/www/dlv/dlv.isc.org.key #dlv-anchor-file: "dlv.isc.org.key" # Ignore chain of trust. Domain is treated as insecure. #domain-insecure: "example.com" # Override the date for validation with a specific fixed date. # Do not set this unless you are debugging signature inception # and expiration. "" or "0" turns the feature off. val-override-date: "" # The signature inception and expiration dates are allowed to be off # by 10% of the signature lifetime (expir-incep) from our local clock. # This leeway is capped with a minimum and a maximum. In seconds. val-sig-skew-min: 3600 val-sig-skew-max: 86400 # The time to live for bogus data, rrsets and messages. This avoids # some of the revalidation, until the time interval expires. in secs. val-bogus-ttl: 60 # Should additional section of secure message also be kept clean of # unsecure data. Useful to shield the users of this validator from # potential bogus data in the additional section. All unsigned data # in the additional section is removed from secure messages. val-clean-additional: yes # Turn permissive mode on to permit bogus messages. Thus, messages # for which security checks failed will be returned to clients, # instead of SERVFAIL. It still performs the security checks, which # result in interesting log files and possibly the AD bit in # replies if the message is found secure. The default is off. val-permissive-mode: yes # It is possible to configure NSEC3 maximum iteration counts per # keysize. Keep this table very short, as linear search is done. # A message with an NSEC3 with larger count is marked insecure. # List in ascending order the keysize and count values. val-nsec3-keysize-iterations: "1024 150 2048 500 4096 2500" # instruct the auto-trust-anchor-file probing to add anchors after ttl. add-holddown: 2592000 # 30 days # instruct the auto-trust-anchor-file probing to del anchors after ttl. del-holddown: 2592000 # 30 days # auto-trust-anchor-file probing removes missing anchors after ttl. # If the value 0 is given, missing anchors are not removed. keep-missing: 31622400 # 366 days ### LOCAL ZONE # a number of locally served zones can be configured. # local-zone: # local-data: "" # o deny serves local data (if any), else, drops queries. # o refuse serves local data (if any), else, replies with error. # o static serves local data, else, nxdomain or nodata answer. # o transparent gives local data, but resolves normally for other names # o redirect serves the zone data for any subdomain in the zone. # o nodefault can be used to normally resolve AS112 zones. # o typetransparent resolves normally for other types and other names # # defaults are localhost address, reverse for 127.0.0.1 and ::1 # and nxdomain for AS112 zones. If you configure one of these zones # the default content is omitted, or you can omit it with 'nodefault'. # # If you configure local-data without specifying local-zone, by # default a transparent local-zone is created for the data. # # You can add locally served data with # local-zone: "local." static # local-data: "mycomputer.local. IN A 192.0.2.51" # local-data: 'mytext.local TXT "content of text record"' # # You can override certain queries with # local-data: "adserver.example.com A 127.0.0.1" # # You can redirect a domain to a fixed address with # (this makes example.com, www.example.com, etc, all go to 192.0.2.3) # local-zone: "example.com" redirect # local-data: "example.com A 192.0.2.3" # # Shorthand to make PTR records, "IPv4 name" or "IPv6 name". # You can also add PTR records using local-data directly, but then # you need to do the reverse notation yourself. # local-data-ptr: "192.0.2.3 www.example.com" ### LOG # verbosity number, 0 is least verbose. 1 is default. verbosity: 1 # print one line with time, IP, name, type, class for every query. log-queries: no # print statistics to the log (for every thread) every N seconds. # Set to "" or 0 to disable. Default is disabled. statistics-interval: 0 # enable cumulative statistics, without clearing them after printing. statistics-cumulative: no # enable extended statistics (query types, answer codes, status) # printed from unbound-control. default off, because of speed. extended-statistics: no # the log file, "" means log to stderr. # Use of this option sets use-syslog to "no". logfile: no # Log to syslog(3) if yes. The log facility LOG_DAEMON is used to # log to, with identity "unbound". If yes, it overrides the logfile. use-syslog: yes # print UTC timestamp in ascii to logfile, default is epoch in seconds. log-time-ascii: yes # [DNSSEC] Have the validator log failed validations for your diagnosis. # 0: off. 1: A line per failed user query. 2: With reason and bad IP. val-log-level: 0 # a number of locally served zones can be configured. include: "/usr/local/etc/unbound/zones.local" include: "/usr/local/etc/unbound/blocked.acl" # Stub zones. # Create entries like below, to make all queries for 'example.com' and # 'example.org' go to the given list of nameservers. list zero or more # nameservers by hostname or by ipaddress. If you set stub-prime to yes, # the list is treated as priming hints (default is no). # stub-zone: # name: "example.com" # stub-addr: 192.0.2.68 # stub-prime: no # stub-zone: # name: "example.org" # stub-host: ns.example.com. # Forward zones # Create entries like below, to make all queries for 'example.com' and # 'example.org' go to the given list of servers. These servers have to handle # recursion to other nameservers. List zero or more nameservers by hostname # or by ipaddress. Use an entry with name "." to forward all queries. # forward-zone: # name: "example.com" # forward-addr: 192.0.2.68 # forward-addr: 192.0.2.73@5355 # forward to port 5355. # forward-zone: # name: "example.org" # forward-host: fwd.example.com ##include: "/usr/local/etc/unbound/fwdzone.dom.local" include: "/usr/local/etc/unbound/fwdzone.isp.local" include: "/usr/local/etc/unbound/fwdzone.custom" # Remote control config section. remote-control: # Enable remote control with unbound-control(8) here. # set up the keys and certificates with unbound-control-setup. control-enable: no # what interfaces are listened to for remote control. # give 0.0.0.0 and ::0 to listen to all interfaces. # control-interface: 127.0.0.1 # control-interface: ::1 # port number for remote control operations. # control-port: 953 # unbound server key file. # server-key-file: "/usr/local/etc/unbound/unbound_server.key" # unbound server certificate file. # server-cert-file: "/usr/local/etc/unbound/unbound_server.pem" # unbound-control key file. # control-key-file: "/usr/local/etc/unbound/unbound_control.key" # unbound-control certificate file. # control-cert-file: "/usr/local/etc/unbound/unbound_control.pem" # Python config section. To enable: # o use --with-pythonmodule to configure before compiling. # o list python in the module-config string (above) to enable. # o and give a python-script to run. python: # Script file to load # python-script: "/usr/local/etc/unbound/ubmodule-tst.py"