#

# Example configuration file.

#

# See unbound.conf(5) man page

#

# this is a comment.

# Use this anywhere in the file to include other text into this file.

#include: "otherfile.conf"

# Use this anywhere in the file to include other text, that explicitly starts a

# clause, into this file. Text after this directive needs to start a clause.

#include-toplevel: "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.

	# Needs to be disabled for munin plugin

	statistics-interval: 0

	# enable shm for stats, default no.  if you enable also enable

	# statistics-interval, every time it also writes stats to the

	# shared memory segment keyed with shm-key.

	# shm-enable: no

	# shm for stats uses this key, and key+1 for the shared mem segment.

	# shm-key: 11777

	# enable cumulative statistics, without clearing them after printing.

	# Needs to be disabled for munin plugin

	statistics-cumulative: no

	# enable extended statistics (query types, answer codes, status)

	# printed from unbound-control. default off, because of speed.

	# Needs to be enabled for munin plugin

	extended-statistics: yes

	# number of threads to create. 1 disables threading.

	num-threads: 4

	# 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: 0.0.0.0

	# interface: ::0

	# interface: 192.0.2.153

	# interface: 192.0.2.154

	# interface: 192.0.2.154@5003

	# 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 disabled

	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

	# 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

	# Prefer ipv4 upstream servers, even if ipv6 is available.

	# prefer-ip4: no

	# 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: 4096

	# permit Unbound to use this port number or port range for

	# making outgoing queries, using an outgoing interface.

	# Only ephemeral ports are allowed by SElinux

	outgoing-port-permit: 32768-60999

	# 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.

	# If multiple outgoing-port-permit and outgoing-port-avoid options

	# are present, they are processed in order.

	# Our SElinux policy does not allow non-ephemeral ports to be used

	outgoing-port-avoid: 0-32767

	outgoing-port-avoid: 61000-65535

	# 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

	# use SO_REUSEPORT to distribute queries over threads.

	# at extreme load it could be better to turn it off to distribute even.

	so-reuseport: yes

	# 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: yes

	# 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

	# the value of the Differentiated Services Codepoint (DSCP)

	# in the differentiated services field (DS) of the outgoing

	# IP packets

	# ip-dscp: 0

	# EDNS reassembly buffer to advertise to UDP peers (the actual buffer

	# is set with msg-buffer-size). 1472 can solve fragmentation (timeouts)

	# edns-buffer-size: 1232

	# Maximum UDP response size (not applied to TCP response).

	# Suggested values are 512 to 4096. Default is 4096. 65536 disables it.

	# 3072 causes +dnssec any isc.org queries to need TC=1.

	# Helps mitigating DDOS

	max-udp-size: 3072

	# max memory to use for stream(tcp and tls) waiting result buffers.

	# stream-wait-size: 4m

	# 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

	# msec to wait before close of port on timeout UDP. 0 disables.

	# delay-close: 0

	# perform connect for UDP sockets to mitigate ICMP side channel.

	# udp-connect: yes

	# msec for waiting for an unknown server to reply.  Increase if you

	# are behind a slow satellite link, to eg. 1128.

	# unknown-server-time-limit: 376

	# 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 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

	# enable to make server probe down hosts more frequently.

	# infra-keep-probing: no

	# 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

	# 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

	# Enable IPv6, "yes" or "no".

	# do-ip6: yes

	# Enable UDP, "yes" or "no".

	# NOTE: if setting up an Unbound on tls443 for public use, you might want 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

	# upstream connections also use UDP (even if do-udp is no).

	# useful if if you want UDP upstream, but don't provide UDP downstream.

	# udp-upstream-without-downstream: 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

	# Idle TCP timeout, connection closed in milliseconds

	# tcp-idle-timeout: 30000

	# Enable EDNS TCP keepalive option.

	edns-tcp-keepalive: yes

	# Timeout for EDNS TCP keepalive, in msec.

	# edns-tcp-keepalive-timeout: 120000

	# Fedora note: do not activate this - can cause a crash

	# Use systemd socket activation for UDP, TCP, and control sockets.

	# use-systemd: no

	# Detach from the terminal, run in background, "yes" or "no".

	# Set the value to "no" when Unbound runs as systemd service.

	# 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_setrd (recursive ok, rd bit is forced on),

	# allow_snoop (recursive and nonrecursive ok)

	# deny_non_local (drop queries unless can be answered from local-data)

	# refuse_non_local (like deny_non_local but polite error reply).

	# 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

	# 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"

	# Set view for access control element

	# access-control-view: 192.0.2.0/24 viewname

	# 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/urandom (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.

	# 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.

	# 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. If yes, it overrides the logfile.

	# use-syslog: yes

	# Log identity to report. if empty, defaults to the name of argv[0]

	# (usually "unbound").

	# log-identity: ""

	# print UTC timestamp in ascii to logfile, default is epoch in seconds.

	log-time-ascii: yes

	# print one line with time, IP, name, type, class for every query.

	# log-queries: no

	# print one line per reply, with time, IP, name, type, class, rcode,

	# timetoresolve, fromcache and responsesize.

	# log-replies: no

	# log with tag 'query' and 'reply' instead of 'info' for

	# filtering log-queries and log-replies from the log.

	# log-tag-queryreply: no

	# log the local-zone actions, like local-zone type inform is enabled

	# also for the other local zone types.

	# log-local-actions: no

	# print log lines that say why queries return SERVFAIL to clients.

	# log-servfail: no

	# 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 https://www.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

	# enable to not set the User-Agent HTTP header.

	# hide-http-user-agent: no

	# enable to not answer trustanchor.unbound queries.

	# hide-trustanchor: no

	# enable to not set the User-Agent HTTP header.

	# hide-http-user-agent: no

	# the identity to report. Leave "" or default to return hostname.

	# identity: ""

	# the version to report. Leave "" or default to return package version.

	# version: ""

	# NSID identity (hex string, or "ascii_somestring"). default disabled.

	# nsid: "aabbccdd"

	# User-Agent HTTP header to use. Leave "" or default to use package name

	# and version.

	# http-user-agent: ""

	# 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: yes

	# 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

	# 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 A when possible.

	qname-minimisation: yes

	# 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.

	# This option only has effect when qname-minimisation is enabled.

	# qname-minimisation-strict: no

	# Aggressive NSEC uses the DNSSEC NSEC chain to synthesize NXDOMAIN

	# and other denials, using information from previous NXDOMAINs answers.

	aggressive-nsec: yes

	# 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

	# Domains (and domains in them) without support for dns-0x20 and

	# the fallback fails because they keep sending different answers.

	# caps-exempt: "licdn.com"

	# caps-exempt: "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: 192.168.0.0/16

	# 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.

	# 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

	# deny queries of type ANY with an empty response.

	deny-any: 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

	# 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"

	# most modules have to be listed at the beginning of the line,

	# except cachedb(just before iterator), and python (at the beginning,

	# or, just before the iterator).

	module-config: "ipsecmod validator iterator"

	# 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:

	# Please note usage of unbound-anchor root anchor is at your own risk

	# and under the terms of our LICENSE (see that file in the source).

	# auto-trust-anchor-file: "/var/lib/unbound/root.key"

	# trust anchor signaling sends a RFC8145 key tag query after priming.

	trust-anchor-signaling: yes

	# Root key trust anchor sentinel (draft-ietf-dnsop-kskroll-sentinel)

	root-key-sentinel: yes

	# 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: ""

	# 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: ""

	#

	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. -1 ignores date.

	# 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 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 maximum number the validator should restart validation with

	# another authority in case of failed validation.

	# val-max-restart: 5

	# 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

	# 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: no

	# Serve expired responses from cache, with serve-expired-reply-ttl in

	# the response, and then attempt to fetch the data afresh.

	serve-expired: yes

	#

	# Limit serving of expired responses to configured seconds after

	# expiration. 0 disables the limit.

	serve-expired-ttl: 14400

	#

	# Set the TTL of expired records to the serve-expired-ttl value after a

	# failed attempt to retrieve the record from upstream. This makes sure

	# that the expired records will be served as long as there are queries

	# for it.

	# serve-expired-ttl-reset: no

	#

	# TTL value to use when replying with expired data.

	# serve-expired-reply-ttl: 30

	#

	# Time in milliseconds before replying to the client with expired data.

	# This essentially enables the serve-stale behavior as specified in

	# RFC 8767 that first tries to resolve before

	# immediately responding with expired data.  0 disables this behavior.

	# A recommended value is 1800.

	# serve-expired-client-timeout: 0

	# Return the original TTL as received from the upstream name server rather

	# than the decrementing TTL as stored in the cache.  Enabling this feature

	# does not impact cache expiry, it only changes the TTL Unbound embeds in

	# responses to queries. Note that enabling this feature implicitly disables

	# enforcement of the configured minimum and maximum TTL.

	# serve-original-ttl: 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 150 4096 150"

	# if enabled, ZONEMD verification failures do not block the zone.

	# zonemd-permissive-mode: no

	# 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

	# 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".

	# 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.

	# 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

	# of the nodefault statements below.

	# You may also have to use domain-insecure: zone to make DNSSEC work,

	# unless you have your own trust anchors for this zone.

	# 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: "test." nodefault

	# local-zone: "invalid." 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: "18.172.in-addr.arpa." nodefault

	# local-zone: "19.172.in-addr.arpa." nodefault

	# local-zone: "20.172.in-addr.arpa." nodefault

	# local-zone: "21.172.in-addr.arpa." nodefault

	# local-zone: "22.172.in-addr.arpa." nodefault

	# local-zone: "23.172.in-addr.arpa." nodefault

	# local-zone: "24.172.in-addr.arpa." nodefault

	# local-zone: "25.172.in-addr.arpa." nodefault

	# local-zone: "26.172.in-addr.arpa." nodefault

	# local-zone: "27.172.in-addr.arpa." nodefault

	# local-zone: "28.172.in-addr.arpa." nodefault

	# local-zone: "29.172.in-addr.arpa." nodefault

	# local-zone: "30.172.in-addr.arpa." nodefault

	# local-zone: "31.172.in-addr.arpa." nodefault