# server:
#     ###########################################################################
#     # BASIC SETTINGS
#     ###########################################################################
#     # Time to live maximum for RRsets and messages in the cache. If the maximum
#     # kicks in, responses to clients still get decrementing TTLs based on the
#     # original (larger) values. When the internal TTL expires, the cache item
#     # has expired. Can be set lower to force the resolver to query for data
#     # often, and not trust (very large) TTL values.
#     cache-max-ttl: 86400

#     # Time to live minimum for RRsets and messages in the cache. If the minimum
#     # kicks in, the data is cached for longer than the domain owner intended,
#     # and thus less queries are made to look up the data. Zero makes sure the
#     # data in the cache is as the domain owner intended, higher values,
#     # especially more than an hour or so, can lead to trouble as the data in
#     # the cache does not match up with the actual data any more.
#     cache-min-ttl: 300

#     # Set the working directory for the program.
#     directory: "/opt/unbound/etc/unbound"

#     # RFC 6891. Number of bytes size to advertise as the EDNS reassembly buffer
#     # size. This is the value put into datagrams over UDP towards peers.
#     # 4096 is RFC recommended. 1472 has a reasonable chance to fit within a
#     # single Ethernet frame, thus lessing the chance of fragmentation
#     # reassembly problems (usually seen as timeouts). Setting to 512 bypasses
#     # even the most stringent path MTU problems, but is not recommended since
#     # the amount of TCP fallback generated is excessive.
#     edns-buffer-size: 1472

#     # Listen to for queries from clients and answer from this network interface
#     # and port.
#     interface: 0.0.0.0@53

#     # Rotates RRSet order in response (the pseudo-random number is taken from
#     # the query ID, for speed and thread safety).
#     rrset-roundrobin: yes

#     # Drop user  privileges after  binding the port.
#     username: "_unbound"

#     ###########################################################################
#     # LOGGING
#     ###########################################################################

#     # Do not print log lines to inform about local zone actions
#     log-local-actions: no

#     # Do not print one line per query to the log
#     log-queries: no

#     # Do not print one line per reply to the log
#     log-replies: no

#     # Do not print log lines that say why queries return SERVFAIL to clients
#     log-servfail: no

#     # Further limit logging
#     logfile: /dev/null

#     # Only log errors
#     verbosity: 5

#     ###########################################################################
#     # PRIVACY SETTINGS
#     ###########################################################################

#     # RFC 8198. Use the DNSSEC NSEC chain to synthesize NXDO-MAIN and other
#     # denials, using information from previous NXDO-MAINs answers. In other
#     # words, use cached NSEC records to generate negative answers within a
#     # range and positive answers from wildcards. This increases performance,
#     # decreases latency and resource utilization on both authoritative and
#     # recursive servers, and increases privacy. Also, it may help increase
#     # resilience to certain DoS attacks in some circumstances.
#     aggressive-nsec: yes

#     # Extra delay for timeouted UDP ports before they are closed, in msec.
#     # This prevents very delayed answer packets from the upstream (recursive)
#     # servers from bouncing against closed ports and setting off all sort of
#     # close-port counters, with eg. 1500 msec. When timeouts happen you need
#     # extra sockets, it checks the ID and remote IP of packets, and unwanted
#     # packets are added to the unwanted packet counter.
#     delay-close: 10000

#     # Prevent the unbound server from forking into the background as a daemon
#     do-daemonize: no

#     # Add localhost to the do-not-query-address list.
#     do-not-query-localhost: no

#     # Number  of  bytes size of the aggressive negative cache.
#     neg-cache-size: 4M

#     # Send minimum amount of information to upstream servers to enhance
#     # privacy (best privacy).
#     qname-minimisation: yes

#     ###########################################################################
#     # SECURITY SETTINGS
#     ###########################################################################
#     # Only give access to recursion clients from LAN IPs
#     access-control: 127.0.0.1/32 allow
#     access-control: 192.168.0.0/16 allow
#     access-control: 172.16.0.0/12 allow
#     access-control: 10.0.0.0/8 allow
#     # access-control: fc00::/7 allow
#     # access-control: ::1/128 allow

#     # File with trust anchor for  one  zone, which is tracked with RFC5011
#     # probes.
#     auto-trust-anchor-file: "var/root.key"

#     # Enable chroot (i.e, change apparent root directory for the current
#     # running process and its children)
#     chroot: "/opt/unbound/etc/unbound"

#     # Deny queries of type ANY with an empty response.
#     deny-any: yes

#     # Harden against algorithm downgrade when multiple algorithms are
#     # advertised in the DS record.
#     harden-algo-downgrade: yes

#     # RFC 8020. returns nxdomain to queries for a name below another name that
#     # is already known to be nxdomain.
#     harden-below-nxdomain: yes

#     # Require DNSSEC data for trust-anchored zones, if such data is absent, the
#     # zone becomes bogus. If turned off you run the risk of a downgrade attack
#     # that disables security for a zone.
#     harden-dnssec-stripped: yes

#     # Only trust glue if it is within the servers authority.
#     harden-glue: yes

#     # Ignore very large queries.
#     harden-large-queries: yes

#     # Perform additional queries for infrastructure data to harden the referral
#     # path. Validates the replies if trust anchors are configured and the zones
#     # are signed. This enforces DNSSEC validation on nameserver NS sets and the
#     # nameserver addresses that are encountered on the referral path to the
#     # answer. Experimental option.
#     harden-referral-path: no

#     # Ignore very small EDNS buffer sizes from queries.
#     harden-short-bufsize: yes

#     # Refuse id.server and hostname.bind queries
#     hide-identity: yes

#     # Refuse version.server and version.bind queries
#     hide-version: yes

#     # Report this identity rather than the hostname of the server.
#     identity: "DNS"

#     # These private network addresses are not allowed to be returned for public
#     # internet names. Any  occurrence of such addresses are removed from DNS
#     # answers. Additionally, the DNSSEC validator may mark the  answers  bogus.
#     # This  protects  against DNS  Rebinding
#     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

#     # Enable ratelimiting of queries (per second) sent to nameserver for
#     # performing recursion. More queries are turned away with an error
#     # (servfail). This stops recursive floods (e.g., random query names), but
#     # not spoofed reflection floods. Cached responses are not rate limited by
#     # this setting. Experimental option.
#     ratelimit: 1000

#     # Use this certificate bundle for authenticating connections made to
#     # outside peers (e.g., auth-zone urls, DNS over TLS connections).
#     tls-cert-bundle: /etc/ssl/certs/ca-certificates.crt

#     # Set the total number of unwanted replies to eep track of in every thread.
#     # When it reaches the threshold, a defensive action of clearing the rrset
#     # and message caches is taken, hopefully flushing away any poison.
#     # Unbound suggests a value of 10 million.
#     unwanted-reply-threshold: 10000

#     # Use 0x20-encoded random bits in the query to foil spoof attempts. This
#     # perturbs the lowercase and uppercase of query names sent to authority
#     # servers and checks if the reply still has the correct casing.
#     # This feature is an experimental implementation of draft dns-0x20.
#     # Experimental option.
#     use-caps-for-id: yes

#     # Help protect users that rely on this validator for authentication from
#     # potentially bad data in the additional section. Instruct the validator to
#     # remove data from the additional section of secure messages that are not
#     # signed properly. Messages that are insecure, bogus, indeterminate or
#     # unchecked are not affected.
#     val-clean-additional: yes

#     ###########################################################################
#     # PERFORMANCE SETTINGS
#     ###########################################################################
#     # https://nlnetlabs.nl/documentation/unbound/howto-optimise/
#     # https://nlnetlabs.nl/news/2019/Feb/05/unbound-1.9.0-released/

#     # Number of slabs in the infrastructure cache. Slabs reduce lock contention
#     # by threads. Must be set to a power of 2.
#     infra-cache-slabs: 4

#     # Number of incoming TCP buffers to allocate per thread. Default
#     # is 10. If set to 0, or if do-tcp is "no", no  TCP  queries  from
#     # clients  are  accepted. For larger installations increasing this
#     # value is a good idea.
#     incoming-num-tcp: 10

#     # Number of slabs in the key cache. Slabs reduce lock contention by
#     # threads. Must be set to a power of 2. Setting (close) to the number
#     # of cpus is a reasonable guess.
#     key-cache-slabs: 4

#     # Number  of  bytes  size  of  the  message  cache.
#     # Unbound recommendation is to Use roughly twice as much rrset cache memory
#     # as you use msg cache memory.
#     msg-cache-size: 855658496

#     # Number of slabs in the message cache. Slabs reduce lock contention by
#     # threads. Must be set to a power of 2. Setting (close) to the number of
#     # cpus is a reasonable guess.
#     msg-cache-slabs: 4

#     # The number of queries that every thread will service simultaneously. If
#     # more queries arrive that need servicing, and no queries can be jostled
#     # out (see jostle-timeout), then the queries are dropped.
#     # This is best set at half the number of the outgoing-range.
#     # This Unbound instance was compiled with libevent so it can efficiently
#     # use more than 1024 file descriptors.
#     num-queries-per-thread: 4096

#     # The number of threads to create to serve clients.
#     # This is set dynamically at run time to effectively use available CPUs
#     # resources
#     num-threads: 2

#     # Number of ports to open. This number of file descriptors can be opened
#     # per thread.
#     # This Unbound instance was compiled with libevent so it can efficiently
#     # use more than 1024 file descriptors.
#     outgoing-range: 8192

#     # Number of bytes size of the RRset cache.
#     # Use roughly twice as much rrset cache memory as msg cache memory
#     rrset-cache-size: 1711316992

#     # Number of slabs in the RRset cache. Slabs reduce lock contention by
#     # threads. Must be set to a power of 2.
#     rrset-cache-slabs: 4

#     # Do no insert authority/additional sections into response messages when
#     # those sections are not required. This reduces response size
#     # significantly, and may avoid TCP fallback for some responses. This may
#     # cause a slight speedup.
#     minimal-responses: yes

#     # # Fetch the DNSKEYs earlier in the validation process, when a DS record
#     # is encountered. This lowers the latency of requests at the expense of
#     # little more CPU usage.
#     prefetch: yes

#     # Fetch the DNSKEYs earlier in the validation process, when a DS record is
#     # encountered. This lowers the latency of requests at the expense of little
#     # more CPU usage.
#     prefetch-key: yes

#     # Have unbound attempt to serve old responses from cache with a TTL of 0 in
#     # the response without waiting for the actual resolution to finish. The
#     # actual resolution answer ends up in the cache later on.
#     serve-expired: yes

#     # Open dedicated listening sockets for incoming queries for each thread and
#     # try to set the SO_REUSEPORT socket option on each socket. May distribute
#     # incoming queries to threads more evenly.
#     so-reuseport: yes

#     ###########################################################################
#     # LOCAL ZONE
#     ###########################################################################

#     # # Include file for local-data and local-data-ptr
#     # include: /opt/unbound/etc/unbound/a-records.conf
#     # include: /opt/unbound/etc/unbound/srv-records.conf

#     # ###########################################################################
#     # # FORWARD ZONE
#     # ###########################################################################

#     # include: /opt/unbound/etc/unbound/forward-records.conf


# remote-control:
#     control-enable: no

server:
    verbosity: 1
    num-threads: 3
    interface: 0.0.0.0@53
    so-reuseport: yes
    edns-buffer-size: 1472
    delay-close: 10000
    cache-min-ttl: 60
    cache-max-ttl: 86400
    do-daemonize: no
    username: "_unbound"
    log-queries: no
    hide-version: yes
    hide-identity: yes
    identity: "DNS"
    harden-algo-downgrade: yes
    harden-short-bufsize: yes
    harden-large-queries: yes
    harden-glue: yes
    harden-dnssec-stripped: yes
    harden-below-nxdomain: yes
    harden-referral-path: no
    do-not-query-localhost: no
    prefetch: yes
    prefetch-key: yes
    qname-minimisation: yes
    aggressive-nsec: yes
    ratelimit: 1000
    rrset-roundrobin: yes
    minimal-responses: yes
    chroot: "/opt/unbound/etc/unbound"
    directory: "/opt/unbound/etc/unbound"
    auto-trust-anchor-file: "var/root.key"
    num-queries-per-thread: 4096
    outgoing-range: 8192
    msg-cache-size: 260991658
    rrset-cache-size: 260991658
    neg-cache-size: 4M
    serve-expired: yes
    unwanted-reply-threshold: 10000
    use-caps-for-id: yes
    val-clean-additional: yes
    tls-cert-bundle: /etc/ssl/certs/ca-certificates.crt
    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
    access-control: 127.0.0.1/32 allow
    access-control: 192.168.1.1/24 allow
    access-control: 172.16.0.0/12 allow
    access-control: 10.0.0.0/8 allow
    logfile: /var/log/unbound.log
    #include: /opt/unbound/etc/unbound/a-records.conf
    forward-zone:
        name: "."
        forward-addr: 1.1.1.1@853#cloudflare-dns.com
        forward-addr: 1.0.0.1@853#cloudflare-dns.com
        forward-addr: 2606:4700:4700::1111@853#cloudflare-dns.com
        forward-addr: 2606:4700:4700::1001@853#cloudflare-dns.com
        forward-tls-upstream: yes
    remote-control:
        control-enable: no