# To test, all options are used.
#
# Example configuration file.
#
# 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: 2
	
	# number of threads to create. 1 disables threading.
	num-threads: 1

	# specify the interfaces to answer queries from by ip-address.
	# If you give none the default (all) interface is used.
	# specify every interface on a new 'interface:' labelled line.
	interface: 192.0.2.153
	interface: 192.0.2.154
	interface: 2001:DB8::5

	# port to answer queries from
	port: 53

	# number of port to allocate per thread, determines the size of the
	# port range. A larger port range gives more resistance to certain
	# spoof attacks, as it gets harder to guess which port is used. 
	# But also takes more system resources (for open sockets).
	outgoing-range: 16

	outgoing-port-permit: 1000-1020
	outgoing-port-avoid: 2000-2048
	outgoing-port-avoid: 3000

	# 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 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.
	# in bytes. default is 4 Mb
	msg-cache-size: 4194304

	# 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

	# the amount of memory to use for the RRset cache.
	# in bytes. default is 4 Mb
	rrset-cache-size: 4194304

	# 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 for cached roundtrip times and
	# EDNS version information for hosts. In seconds.
	infra-host-ttl: 900

	# the time to live (TTL) value for cached lame delegations. In sec.
	infra-lame-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 times, EDNS).
	infra-cache-numhosts: 10000

	# the maximum size of the lame zones cached per host. in bytes.
	infra-cache-lame-size: 10240

	# 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

	# 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.
	chroot: ""

	# if given, user privileges are dropped (after binding port),
	# and the given username is assumed. Default is nothing "".
	username: "nobody"

	# the working directory.
	directory: "."

	# 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: no 

	# the pid file.
	pidfile: "unbound.pid"
	
	# 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: yes
	
	# Harden against unseemly large queries.
	harden-large-queries: yes
	
	# Harden against out of zone rrsets, to avoid spoofing attempts. 
	harden-glue: yes
	
	# Do not query the following addresses. No DNS queries are sent there.
	# List one address per entry. To block other ports than the default
	# DNS port, use "1.2.3.4@123" to block port 123 for 1.2.3.4.
	do-not-query-address: 127.0.0.1
	do-not-query-address: 127.0.0.2
	do-not-query-address: 127.255.255.255
	do-not-query-address: ::1
	
	# module configuration of the server. A string with identifiers
	# separated by spaces. "iterator" or "validator iterator"
	module-config: "validator iterator"
	
	# 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: ""
	
	# 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 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.
	trusted-keys-file: ""

	# 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: 900
	
	# 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: no
	
	# 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"

	# the amount of memory to use for the key cache.
	# in bytes. default is 4 Mb
	key-cache-size: 4194304

	# 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


# 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.
stub-zone:
	name: "example.com"
	stub-addr: 192.0.2.68
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