#
# Example configuration file.
#
-# See unbound.conf(5) man page, version 1.5.1.
+# See unbound.conf(5) man page, version 1.5.10.
#
# this is a comment.
#Use this to include other text into the file.
#include: "otherfile.conf"
-# The server clause sets the main parameters.
+# The server clause sets the main parameters.
server:
# whitespace is not necessary, but looks cleaner.
# interface: 2001:DB8::5
# enable this feature to copy the source address of queries to reply.
- # Socket options are not supported on all platforms. experimental.
+ # Socket options are not supported on all platforms. experimental.
# interface-automatic: no
# port to answer queries from
# outgoing-interface: 192.0.2.153
# outgoing-interface: 2001:DB8::5
# outgoing-interface: 2001:DB8::6
+
+ # Specify a netblock to use remainder 64 bits as random bits for
+ # upstream queries. Uses freebind option (Linux).
+ # outgoing-interface: 2001:DB8::/64
+ # Also (Linux:) ip -6 addr add 2001:db8::/64 dev lo
+ # And: ip -6 route add local 2001:db8::/64 dev lo
+ # And set prefer-ip6: yes to use the ip6 randomness from a netblock.
+ # Set this to yes to prefer ipv6 upstream servers over ipv4.
+ # prefer-ip6: no
# number of ports to allocate per thread, determines the size of the
# port range that can be open simultaneously. About double the
# 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
-
+
# use SO_REUSEPORT to distribute queries over threads.
# so-reuseport: no
+ # use IP_TRANSPARENT so the interface: addresses can be non-local
+ # and you can config non-existing IPs that are going to work later on
+ # (uses IP_BINDANY on FreeBSD).
+ # ip-transparent: no
+
+ # use IP_FREEBIND so the interface: addresses can be non-local
+ # and you can bind to nonexisting IPs and interfaces that are down.
+ # Linux only. On Linux you also have ip-transparent that is similar.
+ # ip-freebind: no
+
# 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
# 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".
+ # 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.
# if very busy, 50% queries run to completion, 50% get timeout in msec
# jostle-timeout: 200
-
+
# msec to wait before close of port on timeout UDP. 0 disables.
# delay-close: 0
# 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".
+ # 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.
# cache. Items are not cached for longer. In seconds.
# cache-max-ttl: 86400
+ # the time to live (TTL) value cap for negative responses in the cache
+ # cache-max-negative-ttl: 3600
+
# the time to live (TTL) value for cached roundtrip times, lameness and
# EDNS version information for hosts. In seconds.
# infra-host-ttl: 900
+ # minimum wait time for responses, increase if uplink is long. In msec.
+ # infra-cache-min-rtt: 50
+
# 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.
# the maximum number of hosts that are cached (roundtrip, EDNS, lame).
# infra-cache-numhosts: 10000
+
+ # define a number of tags here, use with local-zone, access-control.
+ # repeat the define-tag statement to add additional tags.
+ # define-tag: "tag1 tag2 tag3"
# Enable IPv4, "yes" or "no".
# do-ip4: yes
# useful for tunneling scenarios, default no.
# tcp-upstream: no
+ # Maximum segment size (MSS) of TCP socket on which the server
+ # responds to queries. Default is 0, system default MSS.
+ # tcp-mss: 0
+
+ # Maximum segment size (MSS) of TCP socket for outgoing queries.
+ # Default is 0, system default MSS.
+ # outgoing-tcp-mss: 0
+
# Detach from the terminal, run in background, "yes" or "no".
# do-daemonize: yes
# access-control: ::1 allow
# access-control: ::ffff:127.0.0.1 allow
+ # tag access-control with list of tags (in "" with spaces between)
+ # Clients using this access control element use localzones that
+ # are tagged with one of these tags.
+ # access-control-tag: 192.0.2.0/24 "tag2 tag3"
+
+ # set action for particular tag for given access control element
+ # if you have multiple tag values, the tag used to lookup the action
+ # is the first tag match between access-control-tag and local-zone-tag
+ # where "first" comes from the order of the define-tag values.
+ # access-control-tag-action: 192.0.2.0/24 tag3 refuse
+
+ # set redirect data for particular tag for access control element
+ # access-control-tag-data: 192.0.2.0/24 tag2 "A 127.0.0.1"
+
# 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.
+ # 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 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
+ # 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).
# If you give "" no privileges are dropped.
# username: "unbound"
- # the working directory. The relative files in this config are
+ # the working directory. The relative files in this config are
# relative to this directory. If you give "" the working directory
# is not changed.
+ # If you give a server: directory: dir before include: file statements
+ # then those includes can be relative to the working directory.
# directory: "/etc/unbound"
- # the log file, "" means log to stderr.
+ # 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 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
+ # use-syslog: yes
# print UTC timestamp in ascii to logfile, default is epoch in seconds.
# log-time-ascii: no
-
+
# print one line with time, IP, name, type, class for every query.
# log-queries: no
# pidfile: "/var/run/unbound.pid"
# file to read root hints from.
- # get one from ftp://FTP.INTERNIC.NET/domain/named.cache
+ # get one from https://www.internic.net/domain/named.cache
# root-hints: ""
# enable to not answer id.server and hostname.bind queries.
# 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
+ # 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,
# Enclose the list of numbers between quotes ("").
# target-fetch-policy: "3 2 1 0 0"
- # Harden against very small EDNS buffer sizes.
+ # 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 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
+ # 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 the referral path by performing additional queries for
# infrastructure data. Validates the replies (if possible).
- # Default off, because the lookups burden the server. Experimental
+ # Default off, because the lookups burden the server. Experimental
# implementation of draft-wijngaards-dnsext-resolver-side-mitigation.
# harden-referral-path: no
+ # Harden against algorithm downgrade when multiple algorithms are
+ # advertised in the DS record. If no, allows the weakest algorithm
+ # to validate the zone.
+ # harden-algo-downgrade: no
+
+ # Sent 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.
+ # qname-minimisation: 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
- # 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
+ # Domains (and domains in them) without support for dns-0x20 and
+ # the fallback fails because they keep sending different answers.
+ # caps-whitelist: "licdn.com"
+ # caps-whitelist: "senderbase.org"
+
+ # 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: 169.254.0.0/16
# private-address: fd00::/8
# private-address: fe80::/10
+ # private-address: ::ffff:0:0/96
# Allow the domain (and its subdomains) to contain private addresses.
# local-data statements are allowed to contain private addresses too.
# into response messages when those sections are not required.
# minimal-responses: no
+ # true to disable DNSSEC lameness check in iterator.
+ # disable-dnssec-lame-check: no
+
# module configuration of the server. A string with identifiers
# separated by spaces. Syntax: "[dns64] [validator] iterator"
# module-config: "validator 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.
- # Download http://ftp.isc.org/www/dlv/dlv.isc.org.key
+ # DLV is going to be decommissioned. Please do not use it any more.
# dlv-anchor-file: "dlv.isc.org.key"
# File with trusted keys for validation. Specify more than one file
# Zone file format, with DS and DNSKEY entries.
# Note this gets out of date, use auto-trust-anchor-file please.
# trust-anchor-file: "/etc/dnssec/root-anchors.txt"
-
+
# 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.
# 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,
+ # 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: ""
# 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
+ # potential bogus data in the additional section. All unsigned data
# in the additional section is removed from secure messages.
# val-clean-additional: yes
# 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
# If the value 0 is given, missing anchors are not removed.
# keep-missing: 31622400 # 366 days
+ # debug option that allows very small holddown times for key rollover,
+ # otherwise the RFC mandates probe intervals must be at least 1 hour.
+ # permit-small-holddown: no
+
# 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".
+ # 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.
# 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".
+ # plain value in bytes or you can append k, m or G. default is "1Mb".
# neg-cache-size: 1m
-
+
# By default, for a number of zones a small default 'nothing here'
# reply is built-in. Query traffic is thus blocked. If you
# wish to serve such zone you can unblock them by uncommenting one
# local-zone: "localhost." nodefault
# local-zone: "127.in-addr.arpa." nodefault
# 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
+ # local-zone: "onion." nodefault
# local-zone: "10.in-addr.arpa." nodefault
# local-zone: "16.172.in-addr.arpa." nodefault
# local-zone: "17.172.in-addr.arpa." nodefault
# local-zone: "b.e.f.ip6.arpa." nodefault
# local-zone: "8.b.d.0.1.0.0.2.ip6.arpa." nodefault
# And for 64.100.in-addr.arpa. to 127.100.in-addr.arpa.
-
- # if unbound is running service for the local host then it is useful
+
+ # If unbound is running service for the local host then it is useful
# to perform lan-wide lookups to the upstream, and unblock the
# long list of local-zones above. If this unbound is a dns server
# for a network of computers, disabled is better and stops information
# leakage of local lan information.
# unblock-lan-zones: no
+ # The insecure-lan-zones option disables validation for
+ # these zones, as if they were all listed as domain-insecure.
+ # insecure-lan-zones: no
+
# 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 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
+ # o inform resolves normally, but logs client IP address
+ # o inform_deny drops queries and logs client IP address
+ # o always_transparent, always_refuse, always_nxdomain, resolve in
+ # that way but ignore local data for that name.
#
# 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 need to do the reverse notation yourself.
# local-data-ptr: "192.0.2.3 www.example.com"
+ # tag a localzone with a list of tag names (in "" with spaces between)
+ # local-zone-tag: "example.com" "tag2 tag3"
+
+ # add a netblock specific override to a localzone, with zone type
+ # local-zone-override: "example.com" 192.0.2.0/24 refuse
+
# 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: "path/to/privatekeyfile.key"
# ssl-service-pem: "path/to/publiccertfile.pem"
- # ssl-port: 443
+ # ssl-port: 853
# request upstream over SSL (with plain DNS inside the SSL stream).
# Default is no. Can be turned on and off with unbound-control.
# Enable dns64 in module-config. Used to synthesize IPv6 from IPv4.
# dns64-prefix: 64:ff9b::0/96
+ # ratelimit for uncached, new queries, this limits recursion effort.
+ # ratelimiting is experimental, and may help against randomqueryflood.
+ # if 0(default) it is disabled, otherwise state qps allowed per zone.
+ # ratelimit: 0
+
+ # ratelimits are tracked in a cache, size in bytes of cache (or k,m).
+ # ratelimit-size: 4m
+ # ratelimit cache slabs, reduces lock contention if equal to cpucount.
+ # ratelimit-slabs: 4
+
+ # 0 blocks when ratelimited, otherwise let 1/xth traffic through
+ # ratelimit-factor: 10
+
+ # override the ratelimit for a specific domain name.
+ # give this setting multiple times to have multiple overrides.
+ # ratelimit-for-domain: example.com 1000
+ # override the ratelimits for all domains below a domain name
+ # can give this multiple times, the name closest to the zone is used.
+ # ratelimit-below-domain: com 1000
+
# Python config section. To enable:
# o use --with-pythonmodule to configure before compiling.
# o list python in the module-config string (above) to enable.
# Script file to load
# python-script: "/etc/unbound/ubmodule-tst.py"
-# Remote control config section.
+# 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
+ # Set to no and use an absolute path as control-interface to use
+ # a unix local named pipe for unbound-control.
+ # control-use-cert: 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-cert-file: "/etc/unbound/unbound_control.pem"
# 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,
+# 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).
# With stub-first yes, it attempts without the stub if it fails.
+# Consider adding domain-insecure: name and local-zone: name nodefault
+# to the server: section if the stub is a locally served zone.
# stub-zone:
# name: "example.com"
# stub-addr: 192.0.2.68
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