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- [root@efa ~]# cat /etc/unbound/unbound.conf
- #
- # See unbound.conf(5) man page.
- #
- # this is a comment.
- #Use this to include other text into the file.
- #include: "otherfile.conf"
- # The server clause sets the main parameters.
- server:
- # whitespace is not necessary, but looks cleaner.
- # verbosity number, 0 is least verbose. 1 is default.
- verbosity: 1
- # print statistics to the log (for every thread) every N seconds.
- # Set to "" or 0 to disable. Default is disabled.
- # Needed for munin plugin
- statistics-interval: 0
- # enable cumulative statistics, without clearing them after printing.
- # Needed for munin plugin
- statistics-cumulative: no
- # enable extended statistics (query types, answer codes, status)
- # printed from unbound-control. default off, because of speed.
- # Needed for munin plugin
- extended-statistics: yes
- # number of threads to create. 1 disables threading.
- num-threads: 2
- # 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 on a new 'interface:' labelled line.
- # The listen interfaces are not changed on reload, only on restart.
- # interface: 0.0.0.0
- # interface: ::0
- # interface: 192.0.2.153
- # interface: 192.0.2.154
- # interface: 2001:DB8::5
- #
- # for dns over tls and raw dns over port 80
- # interface: 0.0.0.0@443
- # interface: ::0@443
- # interface: 0.0.0.0@80
- # interface: ::0@80
- # enable this feature to copy the source address of queries to reply.
- # Socket options are not supported on all platforms. experimental.
- # interface-automatic: yes
- #
- # NOTE: Enable this option when specifying interface 0.0.0.0 or ::0
- # NOTE: Disabled per Fedora policy not to listen to * on default install
- # NOTE: If deploying on non-default port, eg 80/443, this needs to be di sabled
- interface-automatic: no
- # port to answer queries from
- # port: 53
- # 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
- # outgoing-interface: 2001:DB8::6
- # number of ports to allocate per thread, determines the size of the
- # port range that can be open simultaneously.
- # outgoing-range: 4096
- # permit unbound to use this port number or port range for
- # making outgoing queries, using an outgoing interface.
- # outgoing-port-permit: 32768
- # 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: 10
- # number of incoming simultaneous tcp buffers to hold per thread.
- # incoming-num-tcp: 10
- # 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: 0
- # 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: 0
- # 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: 4096
- # 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
- # 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: 4m
- # 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: 4
- # the number of queries that a thread gets to service.
- # num-queries-per-thread: 1024
- # if very busy, 50% queries run to completion, 50% get timeout in msec
- # jostle-timeout: 200
- # 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: 4m
- # 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: 4
- # 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, lameness
- # and EDNS version information for hosts. In seconds.
- # infra-host-ttl: 900
- # 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: 4
- # the maximum number of hosts that are cached (roundtrip, EDNS, lame).
- # infra-cache-numhosts: 10000
- # Enable IPv4, "yes" or "no".
- # do-ip4: yes
- # Enable IPv6, "yes" or "no".
- do-ip6: no
- # Enable UDP, "yes" or "no".
- # NOTE: if setting up an unbound on tls443 for public use, you might wan t to
- # disable UDP to avoid being used in DNS amplification attacks.
- # 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
- # Detach from the terminal, run in background, "yes" or "no".
- # do-daemonize: yes
- # 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: 127.0.0.0/8 allow
- # access-control: ::0/0 refuse
- # access-control: ::1 allow
- # access-control: ::ffff:127.0.0.1 allow
- # 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: "/var/lib/unbound"
- chroot: ""
- # 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: "/etc/unbound"
- # the log file, "" means log to stderr.
- # Use of this option sets use-syslog to "no".
- # logfile: ""
- # 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
- # the pid file. Can be an absolute path outside of chroot/work dir.
- pidfile: "/var/run/unbound/unbound.pid"
- # file to read root hints from.
- # get one from ftp://FTP.INTERNIC.NET/domain/named.cache
- # root-hints: ""
- # enable to not answer id.server and hostname.bind queries.
- # hide-identity: no
- # enable to not answer version.server and version.bind queries.
- # hide-version: no
- # the identity to report. Leave "" or default to return hostname.
- # identity: ""
- # the version to report. Leave "" or default to return package version.
- # version: ""
- # 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 ("").
- # target-fetch-policy: "3 2 1 0 0"
- # Harden against very small EDNS buffer sizes.
- # 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
- # 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 dnssec-signed nxdomain names.
- harden-below-nxdomain: yes
- # 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: yes
- # Use 0x20-encoded random bits in the query to foil spoof attempts.
- # This feature is an experimental implementation of draft dns-0x20.
- # (this now fails on all GoDaddy customer domains, so disabled)
- use-caps-for-id: no
- # 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: 172.16.0.0/12
- # private-address: 192.168.0.0/16
- # private-address: 192.254.0.0/16
- # 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"
- # 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: 10000000
- # 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
- # if yes, perform prefetching of almost expired message cache entries.
- prefetch: yes
- # if yes, perform key lookups adjacent to normal lookups.
- prefetch-key: yes
- # 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: yes
- # module configuration of the server. A string with identifiers
- # separated by spaces. "iterator" or "validator iterator"
- module-config: "iterator"
- # File with DLV trusted keys. Same format as trust-anchor-file.
- # There can be only one DLV configured, it is trusted from root down.
- # Downloaded from https://secure.isc.org/ops/dlv/dlv.isc.org.key
- #
- # ISC's DLV registry is being deprecated in the near future, therefore
- # it is not used in the default configuration. The use of ISC's DLV
- # registry is discouraged.
- # dlv-anchor-file: "/etc/unbound/dlv.isc.org.key"
- # 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.
- # 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.
- # auto-trust-anchor-file: ""
- # Trusted key for validation. DS or DNSKEY. specify the RR on a
- # single line, surrounded by "". TTL is ignored. class is IN default.
- # (These examples are from August 2007 and may not be valid anymore).
- # trust-anchor: "nlnetlabs.nl. DNSKEY 257 3 5 AQPzzTWMz8qSWIQlfRnPckx2Bi VmkVN6LPupO3mbz7FhLSnm26n6iG9N Lby97Ji453aWZY3M5/xJBSOS2vWtco2t8C0+xeO1bc/d6ZTy3 2DHchpW 6rDH1vp86Ll+ha0tmwyy9QP7y2bVw5zSbFCrefk8qCUBgfHm9bHzMG1U BYtEIQ=="
- # trust-anchor: "jelte.nlnetlabs.nl. DS 42860 5 1 14D739EB566D2B1A5E216A 0BA4D17FA9B038BE4A"
- # 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.
- # trusted-keys-file: ""
- #
- # trusted-keys-file: /etc/unbound/rootkey.bind
- trusted-keys-file: /etc/unbound/keys.d/*.key
- auto-trust-anchor-file: "/var/lib/unbound/root.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 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
- # The signature inception and expiration dates are allowed to be off
- # by 10% of the lifetime of the signature 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
- # 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.
- # NOTE: TURNING THIS ON DISABLES ALL DNSSEC SECURITY
- val-permissive-mode: no
- # 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: 1
- # 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
- # 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: 4m
- # 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: 4
- # the amount of memory to use for the negative cache (used for DLV).
- # plain value in bytes or you can append k, m or G. default is "1Mb".
- # neg-cache-size: 1m
- # a number of locally served zones can be configured.
- # local-zone: <zone> <type>
- # local-data: "<resource record string>"
- # 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 serves 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"
- include: /etc/unbound/local.d/*.conf
- # 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-service-key: "/etc/unbound/unbound_server.key"
- # ssl-service-pem: "/etc/unbound/unbound_server.pem"
- # ssl-port: 443
- # 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
- ## 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: "/etc/unbound/ubmodule-tst.py"
- # Remote control config section.
- remote-control:
- # Enable remote control with unbound-control(8) here.
- # set up the keys and certificates with unbound-control-setup.
- # Note: required for unbound-munin package
- control-enable: yes
- # 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: "/etc/unbound/unbound_server.key"
- # unbound server certificate file.
- server-cert-file: "/etc/unbound/unbound_server.pem"
- # unbound-control key file.
- control-key-file: "/etc/unbound/unbound_control.key"
- # unbound-control certificate file.
- control-cert-file: "/etc/unbound/unbound_control.pem"
- # Stub and Forward zones
- include: /etc/unbound/conf.d/*.conf
- # 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.
- # You can now also dynamically create and delete stub-zone's using
- # unbound-control stub_add domain.com 1.2.3.4 5.6.7.8
- # unbound-control stub_remove domain.com 1.2.3.4 5.6.7.8
- # 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.
- # If you enable forward-first, it attempts without the forward if it fails.
- # forward-zone:
- # name: "example.com"
- # forward-addr: 192.0.2.68
- # forward-addr: 192.0.2.73@5355 # forward to port 5355.
- # forward-first: no
- # forward-zone:
- # name: "example.org"
- # forward-host: fwd.example.com
- #
- # You can now also dynamically create and delete forward-zone's using
- # unbound-control forward_add domain.com 1.2.3.4 5.6.7.8
- # unbound-control forward_remove domain.com 1.2.3.4 5.6.7.8
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