unbound/doc/example.conf

#
# 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

	# unbound needs to send packets to authoritative nameservers.
	# it uses a range of ports for that.
	# the start number of the port range
	# outgoing-port: 1053

	# 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

	# number of outgoing simultaneous tcp buffers to hold per thread.
	# outgoing-num-tcp: 10

	# 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: 1000

	# the maximum number of lame zones per host that are cached.
	# infra-cache-numlame: 1000

	# 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: "/some/directory"

	# if given, user privileges are dropped (after binding port),
	# and the given username is assumed. Default is nothing "".
	# username: "unbound"

	# the working directory.
	# directory: "/etc/unbound"

	# the log file, "" means log to stderr.
	# logfile: ""

	# 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: no
	
	# Harden against unseemly large queries.
	# harden-large-queries: no
	
	# 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: ::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"

# 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