nixpkgs/pkgs/by-name/pi/pihole-ftl/pihole.toml

[dns]
  # Array of upstream DNS servers used by Pi-hole
  # Example: [ "8.8.8.8", "127.0.0.1#5335", "docker-resolver" ]
  #
  # Possible values are:
  #     array of IP addresses and/or hostnames, optionally with a port (#...)
  upstreams = []

  # Use this option to control deep CNAME inspection. Disabling it might be beneficial
  # for very low-end devices
  CNAMEdeepInspect = true

  # Should _esni. subdomains be blocked by default? Encrypted Server Name Indication
  # (ESNI) is certainly a good step into the right direction to enhance privacy on the
  # web. It prevents on-path observers, including ISPs, coffee shop owners and
  # firewalls, from intercepting the TLS Server Name Indication (SNI) extension by
  # encrypting it. This prevents the SNI from being used to determine which websites
  # users are visiting.
  # ESNI will obviously cause issues for pixelserv-tls which will be unable to generate
  # matching certificates on-the-fly when it cannot read the SNI. Cloudflare and Firefox
  # are already enabling ESNI. According to the IEFT draft (link above), we can easily
  # restore piselserv-tls's operation by replying NXDOMAIN to _esni. subdomains of
  # blocked domains as this mimics a "not configured for this domain" behavior.
  blockESNI = true

  # Should we overwrite the query source when client information is provided through
  # EDNS0 client subnet (ECS) information? This allows Pi-hole to obtain client IPs even
  # if they are hidden behind the NAT of a router. This feature has been requested and
  # discussed on Discourse where further information how to use it can be found:
  # https://discourse.pi-hole.net/t/support-for-add-subnet-option-from-dnsmasq-ecs-edns0-client-subnet/35940
  EDNS0ECS = true

  # Should FTL hide queries made by localhost?
  ignoreLocalhost = false

  # Should FTL analyze and show internally generated DNSSEC queries?
  showDNSSEC = true

  # Should FTL analyze *only* A and AAAA queries?
  analyzeOnlyAandAAAA = false

  # Controls whether and how FTL will reply with for address for which a local interface
  # exists. Changing this setting causes FTL to restart.
  #
  # Possible values are:
  #   - "NONE"
  #       Pi-hole will not respond automatically on PTR requests to local interface
  #       addresses. Ensure pi.hole and/or hostname records exist elsewhere.
  #   - "HOSTNAME"
  #       Serve the machine's hostname. The hostname is queried from the kernel through
  #       uname(2)->nodename. If the machine has multiple network interfaces, it can
  #       also have multiple nodenames. In this case, it is unspecified and up to the
  #       kernel which one will be returned. On Linux, the returned string is what has
  #       been set using sethostname(2) which is typically what has been set in
  #       /etc/hostname.
  #   - "HOSTNAMEFQDN"
  #       Serve the machine's hostname (see limitations above) as fully qualified domain
  #       by adding the local domain. If no local domain has been defined (config option
  #       dns.domain), FTL tries to query the domain name from the kernel using
  #       getdomainname(2). If this fails, FTL appends ".no_fqdn_available" to the
  #       hostname.
  #   - "PI.HOLE"
  #       Respond with "pi.hole".
  piholePTR = "PI.HOLE"

  # How should FTL handle queries when the gravity database is not available?
  #
  # Possible values are:
  #   - "BLOCK"
  #       Block all queries when the database is busy.
  #   - "ALLOW"
  #       Allow all queries when the database is busy.
  #   - "REFUSE"
  #       Refuse all queries which arrive while the database is busy.
  #   - "DROP"
  #       Just drop the queries, i.e., never reply to them at all. Despite "REFUSE"
  #       sounding similar to "DROP", it turned out that many clients will just
  #       immediately retry, causing up to several thousands of queries per second. This
  #       does not happen in "DROP" mode.
  replyWhenBusy = "ALLOW"

  # FTL's internal TTL to be handed out for blocked queries in seconds. This settings
  # allows users to select a value different from the dnsmasq config option local-ttl.
  # This is useful in context of locally used hostnames that are known to stay constant
  # over long times (printers, etc.).
  # Note that large values may render whitelisting ineffective due to client-side
  # caching of blocked queries.
  blockTTL = 2

  # Array of custom DNS records
  # Example: hosts = [ "127.0.0.1 mylocal", "192.168.0.1 therouter" ]
  #
  # Possible values are:
  #     Array of custom DNS records each one in HOSTS form: "IP HOSTNAME"
  hosts = []

  # If set, A and AAAA queries for plain names, without dots or domain parts, are never
  # forwarded to upstream nameservers
  domainNeeded = false

  # If set, the domain is added to simple names (without a period) in /etc/hosts in the
  # same way as for DHCP-derived names
  expandHosts = false

  # The DNS domain used by your Pi-hole.
  #
  # This DNS domain is purely local. FTL may answer queries from its local cache and
  # configuration but *never* forwards any requests upstream *unless* you have
  # configured a dns.revServer exactly for this domain. In the latter case, all queries
  # for this domain are sent exclusively to this server (including reverse lookups).
  #
  # For DHCP, this has two effects; firstly it causes the DHCP server to return the
  # domain to any hosts which request it, and secondly it sets the domain which it is
  # legal for DHCP-configured hosts to claim. The intention is to constrain hostnames so
  # that an untrusted host on the LAN cannot advertise its name via DHCP as e.g.
  # "google.com" and capture traffic not meant for it. If no domain suffix is specified,
  # then any DHCP hostname with a domain part (ie with a period) will be disallowed and
  # logged. If a domain is specified, then hostnames with a domain part are allowed,
  # provided the domain part matches the suffix. In addition, when a suffix is set then
  # hostnames without a domain part have the suffix added as an optional domain part.
  # For instance, we can set domain=mylab.com and have a machine whose DHCP hostname is
  # "laptop". The IP address for that machine is available both as "laptop" and
  # "laptop.mylab.com".
  #
  # You can disable setting a domain by setting this option to an empty string.
  #
  # Possible values are:
  #     <any valid domain>
  domain = "lan"

  # Should all reverse lookups for private IP ranges (i.e., 192.168.x.y, etc) which are
  # not found in /etc/hosts or the DHCP leases file be answered with "no such domain"
  # rather than being forwarded upstream?
  bogusPriv = true

  # Validate DNS replies using DNSSEC?
  dnssec = false

  # Interface to use for DNS (see also dnsmasq.listening.mode) and DHCP (if enabled)
  #
  # Possible values are:
  #     a valid interface name
  interface = ""

  # Add A, AAAA and PTR records to the DNS. This adds one or more names to the DNS with
  # associated IPv4 (A) and IPv6 (AAAA) records
  #
  # Possible values are:
  #     <name>[,<name>....],[<IPv4-address>],[<IPv6-address>][,<TTL>]
  hostRecord = ""

  # Pi-hole interface listening modes
  #
  # Possible values are:
  #   - "LOCAL"
  #       Allow only local requests. This setting accepts DNS queries only from hosts
  #       whose address is on a local subnet, i.e., a subnet for which an interface
  #       exists on the server. It is intended to be set as a default on installation,
  #       to allow unconfigured installations to be useful but also safe from being used
  #       for DNS amplification attacks if (accidentally) running public.
  #   - "SINGLE"
  #       Permit all origins, accept only on the specified interface. Respond only to
  #       queries arriving on the specified interface. The loopback (lo) interface is
  #       automatically added to the list of interfaces to use when this option is used.
  #       Make sure your Pi-hole is properly firewalled!
  #   - "BIND"
  #       By default, FTL binds the wildcard address. If this is not what you want, you
  #       can use this option as it forces FTL to really bind only the interfaces it is
  #       listening on. Note that this may result in issues when the interface may go
  #       down (cable unplugged, etc.). About the only time when this is useful is when
  #       running another nameserver on the same port on the same machine. This may also
  #       happen if you run a virtualization API such as libvirt. When this option is
  #       used, IP alias interface labels (e.g. enp2s0:0) are checked rather than
  #       interface names.
  #   - "ALL"
  #       Permit all origins, accept on all interfaces. Make sure your Pi-hole is
  #       properly firewalled! This truly allows any traffic to be replied to and is a
  #       dangerous thing to do as your Pi-hole could become an open resolver. You
  #       should always ask yourself if the first option doesn't work for you as well.
  #   - "NONE"
  #       Do not add any configuration concerning the listening mode to the dnsmasq
  #       configuration file. This is useful if you want to manually configure the
  #       listening mode in auxiliary configuration files. This option is really meant
  #       for advanced users only, support for this option may be limited.
  listeningMode = "LOCAL"

  # Log DNS queries and replies to pihole.log
  queryLogging = true

  # List of CNAME records which indicate that <cname> is really <target>. If the <TTL> is
  # given, it overwrites the value of local-ttl
  #
  # Possible values are:
  #     Array of CNAMEs each on in one of the following forms: "<cname>,<target>[,<TTL>]"
  cnameRecords = []

  # Port used by the DNS server
  port = 53

  # Reverse server (former also called "conditional forwarding") feature
  # Array of reverse servers each one in one of the following forms:
  # "<enabled>,<ip-address>[/<prefix-len>],<server>[#<port>][,<domain>]"
  #
  # Individual components:
  #
  # <enabled>: either "true" or "false"
  #
  # <ip-address>[/<prefix-len>]: Address range for the reverse server feature in CIDR
  # notation. If the prefix length is omitted, either 32 (IPv4) or 128 (IPv6) are
  # substituted (exact address match). This is almost certainly not what you want here.
  # Example: "192.168.0.0/24" for the range 192.168.0.1 - 192.168.0.255
  #
  # <server>[#<port>]: Target server to be used for the reverse server feature
  # Example: "192.168.0.1#53"
  #
  # <domain>: Domain used for the reverse server feature (e.g., "fritz.box")
  # Example: "fritz.box"
  #
  # Possible values are:
  #     array of reverse servers each one in one of the following forms:
  #     "<enabled>,<ip-address>[/<prefix-len>],<server>[#<port>][,<domain>]", e.g.,
  #     "true,192.168.0.0/24,192.168.0.1,fritz.box"
  revServers = []

  [dns.cache]
    # Cache size of the DNS server. Note that expiring cache entries naturally make room
    # for new insertions over time. Setting this number too high will have an adverse
    # effect as not only more space is needed, but also lookup speed gets degraded in the
    # 10,000+ range. dnsmasq may issue a warning when you go beyond 10,000+ cache entries.
    size = 10000

    # Query cache optimizer: If a DNS name exists in the cache, but its time-to-live has
    # expired only recently, the data will be used anyway (a refreshing from upstream is
    # triggered). This can improve DNS query delays especially over unreliable Internet
    # connections. This feature comes at the expense of possibly sometimes returning
    # out-of-date data and less efficient cache utilization, since old data cannot be
    # flushed when its TTL expires, so the cache becomes mostly least-recently-used. To
    # mitigate issues caused by massively outdated DNS replies, the maximum overaging of
    # cached records is limited. We strongly recommend staying below 86400 (1 day) with
    # this option.
    # Setting the TTL excess time to zero will serve stale cache data regardless how long
    # it has expired. This is not recommended as it may lead to stale data being served
    # for a long time. Setting this option to any negative value will disable this feature
    # altogether.
    optimizer = 3600

    # This setting allows you to specify the TTL used for queries blocked upstream. Once
    # the TTL expires, the query will be forwarded to the upstream server again to check
    # if the block is still valid. Defaults to caching for one day (86400 seconds).
    # Setting this value to zero disables caching of queries blocked upstream.
    upstreamBlockedTTL = 86400

  [dns.blocking]
    # Should FTL block queries?
    active = true

    # How should FTL reply to blocked queries?
    #
    # Possible values are:
    #   - "NULL"
    #       In NULL mode, which is both the default and recommended mode for Pi-hole
    #       FTLDNS, blocked queries will be answered with the "unspecified address"
    #       (0.0.0.0 or ::). The "unspecified address" is a reserved IP address specified
    #       by RFC 3513 - Internet Protocol Version 6 (IPv6) Addressing Architecture,
    #       section 2.5.2.
    #   - "IP_NODATA_AAAA"
    #       In IP-NODATA-AAAA mode, blocked queries will be answered with the local IPv4
    #       addresses of your Pi-hole. Blocked AAAA queries will be answered with
    #       NODATA-IPV6 and clients will only try to reach your Pi-hole over its static
    #       IPv4 address.
    #   - "IP"
    #       In IP mode, blocked queries will be answered with the local IP addresses of
    #       your Pi-hole.
    #   - "NX"
    #       In NXDOMAIN mode, blocked queries will be answered with an empty response
    #       (i.e., there won't be an answer section) and status NXDOMAIN. A NXDOMAIN
    #       response should indicate that there is no such domain to the client making the
    #       query.
    #   - "NODATA"
    #       In NODATA mode, blocked queries will be answered with an empty response (no
    #       answer section) and status NODATA. A NODATA response indicates that the domain
    #       exists, but there is no record for the requested query type.
    mode = "NULL"

    # Should FTL enrich blocked replies with EDNS0 information?
    #
    # Possible values are:
    #   - "NONE"
    #       In NONE mode, no additional EDNS information is added to blocked queries
    #   - "CODE"
    #       In CODE mode, blocked queries will be enriched with EDNS info-code BLOCKED (15)
    #   - "TEXT"
    #       In TEXT mode, blocked queries will be enriched with EDNS info-code BLOCKED (15)
    #       and a text message describing the reason for the block
    edns = "TEXT"

  [dns.specialDomains]
    # Should Pi-hole always reply with NXDOMAIN to A and AAAA queries of
    # use-application-dns.net to disable Firefox automatic DNS-over-HTTP? This is
    # following the recommendation on
    # https://support.mozilla.org/en-US/kb/configuring-networks-disable-dns-over-https
    mozillaCanary = true

    # Should Pi-hole always reply with NXDOMAIN to A and AAAA queries of mask.icloud.com
    # and mask-h2.icloud.com to disable Apple's iCloud Private Relay to prevent Apple
    # devices from bypassing Pi-hole? This is following the recommendation on
    # https://developer.apple.com/support/prepare-your-network-for-icloud-private-relay
    iCloudPrivateRelay = true

    # Should Pi-hole always reply with NODATA to all queries to zone resolver.arpa to
    # prevent devices from bypassing Pi-hole using Discovery of Designated Resolvers? This
    # is based on recommendations at the end of RFC 9462, section 4.
    designatedResolver = true

    [dns.reply.host]
      # Use a specific IPv4 address for the Pi-hole host? By default, FTL determines the
      # address of the interface a query arrived on and uses this address for replying to A
      # queries with the most suitable address for the requesting client. This setting can
      # be used to use a fixed, rather than the dynamically obtained, address when Pi-hole
      # responds to the following names: [ "pi.hole", "<the device's hostname>",
      # "pi.hole.<local domain>", "<the device's hostname>.<local domain>" ]
      force4 = false

      # Custom IPv4 address for the Pi-hole host
      #
      # Possible values are:
      #     <valid IPv4 address> or empty string ("")
      IPv4 = ""

      # Use a specific IPv6 address for the Pi-hole host? See description for the IPv4
      # variant above for further details.
      force6 = false

      # Custom IPv6 address for the Pi-hole host
      #
      # Possible values are:
      #     <valid IPv6 address> or empty string ("")
      IPv6 = ""

    [dns.reply.blocking]
      # Use a specific IPv4 address in IP blocking mode? By default, FTL determines the
      # address of the interface a query arrived on and uses this address for replying to A
      # queries with the most suitable address for the requesting client. This setting can
      # be used to use a fixed, rather than the dynamically obtained, address when Pi-hole
      # responds in the following cases: IP blocking mode is used and this query is to be
      # blocked, regular expressions with the ;reply=IP regex extension.
      force4 = false

      # Custom IPv4 address for IP blocking mode
      #
      # Possible values are:
      #     <valid IPv4 address> or empty string ("")
      IPv4 = ""

      # Use a specific IPv6 address in IP blocking mode? See description for the IPv4 variant
      # above for further details.
      force6 = false

      # Custom IPv6 address for IP blocking mode
      #
      # Possible values are:
      #     <valid IPv6 address> or empty string ("")
      IPv6 = ""

  [dns.rateLimit]
    # Rate-limited queries are answered with a REFUSED reply and not further processed by
    # FTL.
    # The default settings for FTL's rate-limiting are to permit no more than 1000 queries
    # in 60 seconds. Both numbers can be customized independently. It is important to note
    # that rate-limiting is happening on a per-client basis. Other clients can continue to
    # use FTL while rate-limited clients are short-circuited at the same time.
    # For this setting, both numbers, the maximum number of queries within a given time,
    # and the length of the time interval (seconds) have to be specified. For instance, if
    # you want to set a rate limit of 1 query per hour, the option should look like
    # RATE_LIMIT=1/3600. The time interval is relative to when FTL has finished starting
    # (start of the daemon + possible delay by DELAY_STARTUP) then it will advance in
    # steps of the rate-limiting interval. If a client reaches the maximum number of
    # queries it will be blocked until the end of the current interval. This will be
    # logged to /var/log/pihole/FTL.log, e.g. Rate-limiting 10.0.1.39 for at least 44
    # seconds. If the client continues to send queries while being blocked already and
    # this number of queries during the blocking exceeds the limit the client will
    # continue to be blocked until the end of the next interval (FTL.log will contain
    # lines like Still rate-limiting 10.0.1.39 as it made additional 5007 queries). As
    # soon as the client requests less than the set limit, it will be unblocked (Ending
    # rate-limitation of 10.0.1.39).
    # Rate-limiting may be disabled altogether by setting both values to zero (this
    # results in the same behavior as before FTL v5.7).
    # How many queries are permitted...
    count = 1000

    # ... in the set interval before rate-limiting?
    interval = 60

[dhcp]
  # Is the embedded DHCP server enabled?
  active = false

  # Start address of the DHCP address pool
  #
  # Possible values are:
  #     <valid IPv4 address> or empty string (""), e.g., "192.168.0.10"
  start = ""

  # End address of the DHCP address pool
  #
  # Possible values are:
  #     <valid IPv4 address> or empty string (""), e.g., "192.168.0.250"
  end = ""

  # Address of the gateway to be used (typically the address of your router in a home
  # installation)
  #
  # Possible values are:
  #     <valid IPv4 address> or empty string (""), e.g., "192.168.0.1"
  router = ""

  # The netmask used by your Pi-hole. For directly connected networks (i.e., networks on
  # which the machine running Pi-hole has an interface) the netmask is optional and may
  # be set to an empty string (""): it will then be determined from the interface
  # configuration itself. For networks which receive DHCP service via a relay agent, we
  # cannot determine the netmask itself, so it should explicitly be specified, otherwise
  # Pi-hole guesses based on the class (A, B or C) of the network address.
  #
  # Possible values are:
  #     <any valid netmask> (e.g., "255.255.255.0") or empty string ("") for
  #     auto-discovery
  netmask = ""

  # If the lease time is given, then leases will be given for that length of time. If not
  # given, the default lease time is one hour for IPv4 and one day for IPv6.
  #
  # Possible values are:
  #     The lease time can be in seconds, or minutes (e.g., "45m") or hours (e.g., "1h")
  #     or days (like "2d") or even weeks ("1w"). You may also use "infinite" as string
  #     but be aware of the drawbacks
  leaseTime = ""

  # Should Pi-hole make an attempt to also satisfy IPv6 address requests (be aware that
  # IPv6 works a whole lot different than IPv4)
  ipv6 = false

  # Enable DHCPv4 Rapid Commit Option specified in RFC 4039. Should only be enabled if
  # either the server is the only server for the subnet to avoid conflicts
  rapidCommit = false

  # Advertise DNS server multiple times to clients. Some devices will add their own
  # proprietary DNS servers to the list of DNS servers, which can cause issues with
  # Pi-hole. This option will advertise the Pi-hole DNS server multiple times to
  # clients, which should prevent this from happening.
  multiDNS = false

  # Enable logging for DHCP. This will log all relevant DHCP-related activity, including,
  # e.g., all the options sent to DHCP clients and the tags used to determine them (if
  # any). This can be useful for debugging DHCP issues. The generated output is saved to
  # the file specified by files.log.dnsmasq below.
  logging = false

  # Ignore unknown DHCP clients.
  # If this option is set, Pi-hole ignores all clients which are not explicitly
  # configured through dhcp.hosts. This can be useful to prevent unauthorized clients
  # from getting an IP address from the DHCP server.
  # It should be noted that this option is not a security feature, as clients can still
  # assign themselves an IP address and use the network. It is merely a convenience
  # feature to prevent unknown clients from getting a valid IP configuration assigned
  # automatically.
  # Note that you will need to configure new clients manually in dhcp.hosts before they
  # can use the network when this feature is enabled.
  ignoreUnknownClients = false

  # Per host parameters for the DHCP server. This allows a machine with a particular
  # hardware address to be always allocated the same hostname, IP address and lease time
  # or to specify static DHCP leases
  #
  # Possible values are:
  #     Array of static leases each on in one of the following forms:
  #     "[<hwaddr>][,id:<client_id>|*][,set:<tag>][,tag:<tag>][,<ipaddr>][,<hostname>][,<lease_time>][,ignore]"
  hosts = []

  [ntp.ipv4]
    # Should FTL act as network time protocol (NTP) server (IPv4)?
    active = true

    # IPv4 address to listen on for NTP requests
    #
    # Possible values are:
    #     <valid IPv4 address> or empty string ("") for wildcard (0.0.0.0)
    address = ""

  [ntp.ipv6]
    # Should FTL act as network time protocol (NTP) server (IPv6)?
    active = true

    # IPv6 address to listen on for NTP requests
    #
    # Possible values are:
    #     <valid IPv6 address> or empty string ("") for wildcard (::)
    address = ""

  [ntp.sync]
    # Should FTL try to synchronize the system time with an upstream NTP server?
    active = true

    # NTP upstream server to sync with, e.g., "pool.ntp.org". Note that the NTP server
    # should be located as close as possible to you in order to minimize the time offset
    # possibly introduced by different routing paths.
    #
    # Possible values are:
    #     valid NTP upstream server
    server = "pool.ntp.org"

    # Interval in seconds between successive synchronization attempts with the NTP server
    interval = 3600

    # Number of NTP syncs to perform and average before updating the system time
    count = 8

    [ntp.sync.rtc]
      # Should FTL update a real-time clock (RTC) if available?
      set = false

      # Path to the RTC device to update. Leave empty for auto-discovery
      #
      # Possible values are:
      #     Path to the RTC device, e.g., "/dev/rtc0"
      device = ""

      # Should the RTC be set to UTC?
      utc = true

[resolver]
  # Should FTL try to resolve IPv4 addresses to hostnames?
  resolveIPv4 = true

  # Should FTL try to resolve IPv6 addresses to hostnames?
  resolveIPv6 = true

  # Control whether FTL should use the fallback option to try to obtain client names from
  # checking the network table. This behavior can be disabled with this option.
  # Assume an IPv6 client without a host names. However, the network table knows -
  # though the client's MAC address - that this is the same device where we have a host
  # name for another IP address (e.g., a DHCP server managed IPv4 address). In this
  # case, we use the host name associated to the other address as this is the same
  # device.
  networkNames = true

  # With this option, you can change how (and if) hourly PTR requests are made to check
  # for changes in client and upstream server hostnames.
  #
  # Possible values are:
  #   - "IPV4_ONLY"
  #       Do hourly PTR lookups only for IPv4 addresses. This is the new default since
  #       Pi-hole FTL v5.3.2. It should resolve issues with more and more very
  #       short-lived PE IPv6 addresses coming up in a lot of networks.
  #   - "ALL"
  #       Do hourly PTR lookups for all addresses. This was the default until FTL
  #       v5.3(.1). It has been replaced as it can create a lot of PTR queries for those
  #       with many IPv6 addresses in their networks.
  #   - "UNKNOWN"
  #       Only resolve unknown hostnames. Already existing hostnames are never refreshed,
  #       i.e., there will be no PTR queries made for clients where hostnames are known.
  #       This also means that known hostnames will not be updated once known.
  #   - "NONE"
  #       Don't do any hourly PTR lookups. This means we look host names up exactly once
  #       (when we first see a client) and never again. You may miss future changes of
  #       host names.
  refreshNames = "IPV4_ONLY"

[database]
  # Should FTL load information from the database on startup to be aware of the most
  # recent history?
  DBimport = true

  # How long should queries be stored in the database [days]?
  # Setting this value to 0 will disable the database.
  maxDBdays = 91

  # How often do we store queries in FTL's database [seconds]?
  DBinterval = 60

  # Should FTL enable Write-Ahead Log (WAL) mode for the on-disk query database
  # (configured via files.database)?
  # It is recommended to leave this setting enabled for performance reasons. About the
  # only reason to disable WAL mode is if you are experiencing specific issues with it,
  # e.g., when using a database that is accessed from multiple hosts via a network
  # share. When this setting is disabled, FTL will use SQLite3's default journal mode
  # (rollback journal in DELETE mode).
  useWAL = true

  [database.network]
    # Should FTL analyze the local ARP cache? When disabled, client identification and the
    # network table will stop working reliably.
    parseARPcache = true

    # How long should IP addresses be kept in the network_addresses table [days]? IP
    # addresses (and associated host names) older than the specified number of days are
    # removed to avoid dead entries in the network overview table.
    expire = 91

[webserver]
  # On which domain is the web interface served?
  #
  # Possible values are:
  #     <valid domain>
  domain = "pi.hole"

  # Webserver access control list (ACL) allowing for restrictions to be put on the list
  # of IP addresses which have access to the web server. The ACL is a comma separated
  # list of IP subnets, where each subnet is prepended by either a - or a + sign. A plus
  # sign means allow, where a minus sign means deny. If a subnet mask is omitted, such
  # as -1.2.3.4, this means to deny only that single IP address. If this value is not
  # set (empty string), all accesses are allowed. Otherwise, the default setting is to
  # deny all accesses. On each request the full list is traversed, and the last (!)
  # match wins. IPv6 addresses may be specified in CIDR-form [a:b::c]/64.
  #
  # Example 1: acl = "+127.0.0.1,+[::1]"
  # ---> deny all access, except from 127.0.0.1 and ::1,
  # Example 2: acl = "+192.168.0.0/16"
  # ---> deny all accesses, except from the 192.168.0.0/16 subnet,
  # Example 3: acl = "+[::]/0" ---> allow only IPv6 access.
  #
  # Possible values are:
  #     <valid ACL>
  acl = ""

  # Ports to be used by the webserver.
  # Comma-separated list of ports to listen on. It is possible to specify an IP address
  # to bind to. In this case, an IP address and a colon must be prepended to the port
  # number. For example, to bind to the loopback interface on port 80 (IPv4) and to all
  # interfaces port 8080 (IPv4), use "127.0.0.1:80,8080". "[::]:80" can be used to
  # listen to IPv6 connections to port 80. IPv6 addresses of network interfaces can be
  # specified as well, e.g. "[::1]:80" for the IPv6 loopback interface. [::]:80 will
  # bind to port 80 IPv6 only.
  # In order to use port 80 for all interfaces, both IPv4 and IPv6, use either the
  # configuration "80,[::]:80" (create one socket for IPv4 and one for IPv6 only), or
  # "+80" (create one socket for both, IPv4 and IPv6). The '+' notation to use IPv4 and
  # IPv6 will only work if no network interface is specified. Depending on your
  # operating system version and IPv6 network environment, some configurations might not
  # work as expected, so you have to test to find the configuration most suitable for
  # your needs. In case "+80" does not work for your environment, you need to use
  # "80,[::]:80".
  # If the port is TLS/SSL, a letter 's' (secure) must be appended, for example,
  # "80,443s" will open port 80 and port 443, and connections on port 443 will be
  # encrypted. For non-encrypted ports, it is allowed to append letter 'r' (as in
  # redirect). Redirected ports will redirect all their traffic to the first configured
  # SSL port. For example, if webserver.port is "80r,443s", then all HTTP traffic coming
  # at port 80 will be redirected to HTTPS port 443.
  # When specifying 'o' (optional) behind a port, inability to use this port is not
  # considered an error. For instance, specifying "80o,8080o" will allow the webserver
  # to listen on either 80, 8080, both or even none of the two ports. This flag may be
  # combined with 'r' and 's' like "80or,443os,8080,4443s" (80 redirecting to SSL if
  # available, 443 encrypted if available, 8080 mandatory and unencrypted, 4443
  # mandatory and encrypted).
  # If this value is not set (empty string), the web server will not be started and,
  # hence, the API will not be available.
  #
  # Possible values are:
  #     comma-separated list of <[ip_address:]port>
  port = "80o,443os,[::]:80o,[::]:443os"

  # Maximum number of worker threads allowed.
  # The Pi-hole web server handles each incoming connection in a separate thread.
  # Therefore, the value of this option is effectively the number of concurrent HTTP
  # connections that can be handled. Any other connections are queued until they can be
  # processed by a unoccupied thread.
  # The total number of threads you see may be lower than the configured value as
  # threads are only created when needed due to incoming connections.
  # The value 0 means the number of threads is 50 (as per default settings of CivetWeb)
  # for backwards-compatible behavior.
  threads = 50

  # Additional HTTP headers added to the web server responses.
  # The headers are added to all responses, including those for the API.
  # Note about the default additional headers:
  # - X-DNS-Prefetch-Control: off: Usually browsers proactively perform domain name
  # resolution on links that the user may choose to follow. We disable DNS prefetching
  # here.
  # - Content-Security-Policy: [...] 'unsafe-inline' is both required by Chart.js
  # styling some elements directly, and index.html containing some inlined Javascript
  # code.
  # - X-Frame-Options: DENY: The page can not be displayed in a frame, regardless of the
  # site attempting to do so.
  # - X-Xss-Protection: 0: Disables XSS filtering in browsers that support it. This
  # header is usually enabled by default in browsers, and is not recommended as it can
  # hurt the security of the site.
  # (https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protection).
  # - X-Content-Type-Options: nosniff: Marker used by the server to indicate that the
  # MIME types advertised in the  Content-Type headers should not be changed and be
  # followed. This allows to opt-out of MIME type sniffing, or, in other words, it is a
  # way to say that the webmasters knew what they were doing. Site security testers
  # usually expect this header to be set.
  # - Referrer-Policy: strict-origin-when-cross-origin: A referrer will be sent for
  # same-site origins, but cross-origin requests will send no referrer information.
  # The latter four headers are set as expected by https://securityheaders.io
  #
  # Possible values are:
  #     array of HTTP headers
  headers = [
    "X-DNS-Prefetch-Control: off",
    "Content-Security-Policy: default-src 'self' 'unsafe-inline';",
    "X-Frame-Options: DENY",
    "X-XSS-Protection: 0",
    "X-Content-Type-Options: nosniff",
    "Referrer-Policy: strict-origin-when-cross-origin"
  ]

  # Should the web server serve all files in webserver.paths.webroot directory? If
  # disabled, only files within the path defined through webserver.paths.webhome and
  # /api will be served.
  serve_all = false

  [webserver.session]
    # Session timeout in seconds. If a session is inactive for more than this time, it will
    # be terminated. Sessions are continuously refreshed by the web interface, preventing
    # sessions from timing out while the web interface is open.
    # This option may also be used to make logins persistent for long times, e.g. 86400
    # seconds (24 hours), 604800 seconds (7 days) or 2592000 seconds (30 days). Note that
    # the total number of concurrent sessions is limited so setting this value too high
    # may result in users being rejected and unable to log in if there are already too
    # many sessions active.
    timeout = 1800

    # Should Pi-hole backup and restore sessions from the database? This is useful if you
    # want to keep your sessions after a restart of the web interface.
    restore = true

  [webserver.tls]
    # Path to the TLS (SSL) certificate file. All directories along the path must be
    # readable and accessible by the user running FTL (typically 'pihole'). This option is
    # only required when at least one of webserver.port is TLS. The file must be in PEM
    # format, and it must have both, private key and certificate (the *.pem file created
    # must contain a 'CERTIFICATE' section as well as a 'RSA PRIVATE KEY' section).
    # The *.pem file can be created using
    #     cp server.crt server.pem
    #     cat server.key >> server.pem
    # if you have these files instead
    #
    # Possible values are:
    #     <valid TLS certificate file (*.pem)>
    cert = "/etc/pihole/tls.pem"

  [webserver.paths]
    # Server root on the host
    #
    # Possible values are:
    #     <valid path>
    webroot = "/var/www/html"

    # Sub-directory of the root containing the web interface
    #
    # Possible values are:
    #     <valid subpath>, both slashes are needed!
    webhome = "/admin/"

    # Prefix where the web interface is served
    # This is useful when you are using a reverse proxy serving the web interface, e.g.,
    # at http://<ip>/pihole/admin/ instead of http://<ip>/admin/. In this example, the
    # prefix would be "/pihole". Note that the prefix has to be stripped away by the
    # reverse proxy, e.g., for traefik:
    # - traefik.http.routers.pihole.rule=PathPrefix(`/pihole`)
    # - traefik.http.middlewares.piholehttp.stripprefix.prefixes=/pihole
    # The prefix should start with a slash. If you don't use a prefix, leave this field
    # empty. Setting this field to an incorrect value may result in the web interface not
    # being accessible.
    # Don't use this setting if you are not using a reverse proxy!
    #
    # Possible values are:
    #     valid URL prefix or empty
    prefix = ""

  [webserver.interface]
    # Should the web interface use the boxed layout?
    boxed = true

    # Theme used by the Pi-hole web interface
    #
    # Possible values are:
    #   - "default-auto"
    #       Pi-hole auto
    #   - "default-light"
    #       Pi-hole day
    #   - "default-dark"
    #       Pi-hole midnight
    #   - "default-darker"
    #       Pi-hole deep-midnight
    #   - "high-contrast"
    #       High-contrast light
    #   - "high-contrast-dark"
    #       High-contrast dark
    #   - "lcars"
    #       Star Trek LCARS
    theme = "default-auto"

  [webserver.api]
    # Number of concurrent sessions allowed for the API. If the number of sessions exceeds
    # this value, no new sessions will be allowed until the number of sessions drops due
    # to session expiration or logout. Note that the number of concurrent sessions is
    # irrelevant if authentication is disabled as no sessions are used in this case.
    max_sessions = 16

    # Should FTL prettify the API output (add extra spaces, newlines and indentation)?
    prettyJSON = false

    # API password hash
    #
    # Possible values are:
    #     <valid Pi-hole password hash>
    pwhash = ""

    # Pi-hole 2FA TOTP secret. When set to something different than "", 2FA authentication
    # will be enforced for the API and the web interface. This setting is write-only, you
    # can not read the secret back.
    #
    # Possible values are:
    #     <valid TOTP secret (20 Bytes in Base32 encoding)>
    totp_secret = ""

    # Pi-hole application password.
    # After you turn on two-factor (2FA) verification and set up an Authenticator app, you
    # may run into issues if you use apps or other services that don't support two-step
    # verification. In this case, you can create and use an app password to sign in. An
    # app password is a long, randomly generated password that can be used instead of your
    # regular password + TOTP token when signing in to the API. The app password can be
    # generated through the API and will be shown only once. You can revoke the app
    # password at any time. If you revoke the app password, be sure to generate a new one
    # and update your app with the new password.
    #
    # Possible values are:
    #     <valid Pi-hole password hash>
    app_pwhash = ""

    # Should application password API sessions be allowed to modify config settings?
    # Setting this to true allows third-party applications using the application password
    # to modify settings, e.g., the upstream DNS servers, DHCP server settings, or
    # changing passwords. This setting should only be enabled if really needed and only if
    # you trust the applications using the application password.
    app_sudo = false

    # Should FTL create a temporary CLI password? This password is stored in clear in
    # /etc/pihole and can be used by the CLI (pihole ...  commands) to authenticate
    # against the API. Note that the password is only valid for the current session and
    # regenerated on each FTL restart. Sessions initiated with this password cannot modify
    # the Pi-hole configuration (change passwords, etc.) for security reasons but can
    # still use the API to query data and manage lists.
    cli_pw = true

    # Array of clients to be excluded from certain API responses (regex):
    # - Query Log (/api/queries)
    # - Top Clients (/api/stats/top_clients)
    # This setting accepts both IP addresses (IPv4 and IPv6) as well as hostnames.
    # Note that backslashes "\" need to be escaped, i.e. "\\" in this setting
    #
    # Example: [ "^192\\.168\\.2\\.56$", "^fe80::341:[0-9a-f]*$", "^localhost$" ]
    #
    # Possible values are:
    #     array of regular expressions describing clients
    excludeClients = []

    # Array of domains to be excluded from certain API responses (regex):
    # - Query Log (/api/queries)
    # - Top Clients (/api/stats/top_domains)
    # Note that backslashes "\" need to be escaped, i.e. "\\" in this setting
    #
    # Example: [ "(^|\\.)\\.google\\.de$", "\\.pi-hole\\.net$" ]
    #
    # Possible values are:
    #     array of regular expressions describing domains
    excludeDomains = []

    # How much history should be imported from the database and returned by the API
    # [seconds]? (max 24*60*60 = 86400)
    maxHistory = 86400

    # Up to how many clients should be returned in the activity graph endpoint
    # (/api/history/clients)?
    # This setting can be overwritten at run-time using the parameter N. Setting this to 0
    # will always send all clients. Be aware that this may be challenging for the GUI if
    # you have many (think > 1.000 clients) in your network
    maxClients = 10

    # How should the API compute the most active clients? If set to true, the API will
    # return the clients with the most queries globally (within 24 hours). If set to
    # false, the API will return the clients with the most queries per time slot
    # individually.
    client_history_global_max = true

    # Allow destructive API calls (e.g. deleting all queries, powering off the system, ...)
    allow_destructive = true

    [webserver.api.temp]
      # Which upper temperature limit should be used by Pi-hole? Temperatures above this
      # limit will be shown as "hot". The number specified here is in the unit defined below
      limit = 60.000000

      # Which temperature unit should be used for temperatures processed by FTL?
      #
      # Possible values are:
      #   - "C"
      #       Celsius
      #   - "F"
      #       Fahrenheit
      #   - "K"
      #       Kelvin
      unit = "C"

[files]
  # The file which contains the PID of FTL's main process.
  #
  # Possible values are:
  #     <any writable file>
  pid = "/run/pihole-FTL.pid"

  # The location of FTL's long-term database
  #
  # Possible values are:
  #     <any FTL database>
  database = "/etc/pihole/pihole-FTL.db"

  # The location of Pi-hole's gravity database
  #
  # Possible values are:
  #     <any Pi-hole gravity database>
  gravity = "/etc/pihole/gravity.db"

  # A temporary directory where Pi-hole can store files during gravity updates. This
  # directory must be writable by the user running gravity (typically pihole).
  #
  # Possible values are:
  #     <any existing world-writable writable directory>
  gravity_tmp = "/tmp"

  # The database containing MAC -> Vendor information for the network table
  #
  # Possible values are:
  #     <any Pi-hole macvendor database>
  macvendor = "/etc/pihole/macvendor.db"

  # The old config file of Pi-hole used before v6.0
  #
  # Possible values are:
  #     <any Pi-hole setupVars file>
  setupVars = "/etc/pihole/setupVars.conf"

  # An optional file containing a pcap capture of the network traffic. This file is used
  # for debugging purposes only. If you don't know what this is, you don't need it.
  # Setting this to an empty string disables pcap recording. The file must be writable
  # by the user running FTL (typically pihole). Failure to write to this file will
  # prevent the DNS resolver from starting. The file is appended to if it already
  # exists.
  #
  # Possible values are:
  #     <any writable pcap file>
  pcap = ""

  [files.log]
    # The location of FTL's log file
    #
    # Possible values are:
    #     <any writable file>
    ftl = "/var/log/pihole/FTL.log"

    # The log file used by the embedded dnsmasq DNS server
    #
    # Possible values are:
    #     <any writable file>
    dnsmasq = "/var/log/pihole/pihole.log"

    # The log file used by the webserver
    #
    # Possible values are:
    #     <any writable file>
    webserver = "/var/log/pihole/webserver.log"

[misc]
  # Using privacy levels you can specify which level of detail you want to see in your
  # Pi-hole statistics. Changing this setting will trigger a restart of FTL
  #
  # Possible values are:
  #   - 0
  #       Don't hide anything, all statistics are available.
  #   - 1
  #       Hide domains. This setting disables Top Domains and Top Ads
  #   - 2
  #       Hide domains and clients. This setting disables Top Domains, Top Ads, Top
  #       Clients and Clients over time.
  #   - 3
  #       Anonymize everything. This setting disabled almost any statistics and query
  #       analysis. There will be no long-term database logging and no Query Log. You
  #       will also loose most regex features.
  privacylevel = 0

  # During startup, in some configurations, network interfaces appear only late during
  # system startup and are not ready when FTL tries to bind to them. Therefore, you may
  # want FTL to wait a given amount of time before trying to start the DNS revolver.
  # This setting takes any integer value between 0 and 300 seconds. To prevent delayed
  # startup while the system is already running and FTL is restarted, the delay only
  # takes place within the first 180 seconds (hard-coded) after booting.
  delay_startup = 0

  # Set niceness of pihole-FTL. Defaults to -10 and can be disabled altogether by setting
  # a value of -999. The nice value is an attribute that can be used to influence the
  # CPU scheduler to favor or disfavor a process in scheduling decisions. The range of
  # the nice value varies across UNIX systems. On modern Linux, the range is -20 (high
  # priority = not very nice to other processes) to +19 (low priority).
  nice = -10

  # Should FTL translate its own stack addresses into code lines during the bug
  # backtrace? This improves the analysis of crashed significantly. It is recommended to
  # leave the option enabled. This option should only be disabled when addr2line is
  # known to not be working correctly on the machine because, in this case, the
  # malfunctioning addr2line can prevent from generating any backtrace at all.
  addr2line = true

  # Should FTL load additional dnsmasq configuration files from /etc/dnsmasq.d/?
  # Warning: This is an advanced setting and should only be used with care.
  # Incorrectly formatted or config files specifying options which can only be defined
  # once can result in conflicts with the automatic configuration of Pi-hole (see
  # /etc/pihole/dnsmasq.conf) and may stop DNS resolution from working.
  etc_dnsmasq_d = false

  # Additional lines to inject into the generated dnsmasq configuration.
  # Warning: This is an advanced setting and should only be used with care. Incorrectly
  # formatted or duplicated lines as well as lines conflicting with the automatic
  # configuration of Pi-hole can break the embedded dnsmasq and will stop DNS resolution
  # from working.
  # Use this option with extra care.
  #
  # Possible values are:
  #     array of valid dnsmasq config line options
  dnsmasq_lines = []

  # Log additional information about queries and replies to pihole.log
  # When this setting is enabled, the log has extra information at the start of each
  # line. This consists of a serial number which ties together the log lines associated
  # with an individual query, and the IP address of the requestor. This setting is only
  # effective if dns.queryLogging is enabled, too. This option is only useful for
  # debugging and is not recommended for normal use.
  extraLogging = false

  # Put configuration into read-only mode. This will prevent any changes to the
  # configuration file via the API or CLI. This setting useful when a configuration is
  # to be forced/modified by some third-party application (like infrastructure-as-code
  # providers) and should not be changed by any means.
  readOnly = false

  [misc.check]
    # Pi-hole is very lightweight on resources. Nevertheless, this does not mean that you
    # should run Pi-hole on a server that is otherwise extremely busy as queuing on the
    # system can lead to unnecessary delays in DNS operation as the system becomes less
    # and less usable as the system load increases because all resources are permanently
    # in use. To account for this, FTL regularly checks the system load. To bring this to
    # your attention, FTL warns about excessive load when the 15 minute system load
    # average exceeds the number of cores.
    # This check can be disabled with this setting.
    load = true

    # FTL stores history in shared memory to allow inter-process communication with forked
    # dedicated TCP workers. If FTL runs out of memory, it cannot continue to work as
    # queries cannot be analyzed any further. Hence, FTL checks if enough shared memory is
    # available on your system and warns you if this is not the case.
    # By default, FTL warns if the shared-memory usage exceeds 90%. You can set any
    # integer limit between 0 to 100 (interpreted as percentages) where 0 means that
    # checking of shared-memory usage is disabled.
    shmem = 90

    # FTL stores its long-term history in a database file on disk. Furthermore, FTL stores
    # log files. By default, FTL warns if usage of the disk holding any crucial file
    # exceeds 90%. You can set any integer limit between 0 to 100 (interpreted as
    # percentages) where 0 means that checking of disk usage is disabled.
    disk = 90

[debug]
  # Print debugging information about database actions. This prints performed SQL
  # statements as well as some general information such as the time it took to store the
  # queries and how many have been saved to the database.
  database = false

  # Prints a list of the detected interfaces on the startup of pihole-FTL. Also, prints
  # whether these interfaces are IPv4 or IPv6 interfaces.
  networking = false

  # Print information about shared memory locks. Messages will be generated when waiting,
  # obtaining, and releasing a lock.
  locks = false

  # Print extensive query information (domains, types, replies, etc.). This has always
  # been part of the legacy debug mode of pihole-FTL.
  queries = false

  # Print flags of queries received by the DNS hooks. Only effective when DEBUG_QUERIES
  # is enabled as well.
  flags = false

  # Print information about shared memory buffers. Messages are either about creating or
  # enlarging shmem objects or string injections.
  shmem = false

  # Print information about garbage collection (GC): What is to be removed, how many have
  # been removed and how long did GC take.
  gc = false

  # Print information about ARP table processing: How long did parsing take, whether read
  # MAC addresses are valid, and if the macvendor.db file exists.
  arp = false

  # Controls if FTLDNS should print extended details about regex matching into FTL.log.
  regex = false

  # Print extra debugging information concerning API calls. This includes the request,
  # the request parameters, and the internal details about how the algorithms decide
  # which data to present and in what form. This very verbose output should only be used
  # when debugging specific API issues and can be helpful, e.g., when a client cannot
  # connect due to an obscure API error. Furthermore, this setting enables logging of
  # all API requests (auth log) and details about user authentication attempts.
  api = false

  # Print extra debugging information about TLS connections. This includes the TLS
  # version, the cipher suite, the certificate chain and much more. This very verbose
  # output should only be used when debugging specific TLS issues and can be helpful,
  # e.g., when a client cannot connect due to an obscure TLS error as modern browsers do
  # not provide much information about the underlying TLS connection and most often give
  # only very generic error messages without much/any underlying technical information.
  tls = false

  # Print information about overTime memory operations, such as initializing or moving
  # overTime slots.
  overtime = false

  # Print information about status changes for individual queries. This can be useful to
  # identify unexpected unknown queries.
  status = false

  # Print information about capabilities granted to the pihole-FTL process. The current
  # capabilities are printed on receipt of SIGHUP, i.e., the current set of capabilities
  # can be queried without restarting pihole-FTL (by setting DEBUG_CAPS=true and
  # thereafter sending killall -HUP pihole-FTL).
  caps = false

  # Print information about DNSSEC activity
  dnssec = false

  # FTL uses dynamically allocated vectors for various tasks. This config option enables
  # extensive debugging information such as information about allocation, referencing,
  # deletion, and appending.
  vectors = false

  # Extensive information about hostname resolution like which DNS servers are used in
  # the first and second hostname resolving tries (only affecting internally generated
  # PTR queries).
  resolver = false

  # Print debugging information about received EDNS(0) data.
  edns0 = false

  # Log various important client events such as change of interface (e.g., client
  # switching from WiFi to wired or VPN connection), as well as extensive reporting
  # about how clients were assigned to its groups.
  clients = false

  # Log information related to alias-client processing.
  aliasclients = false

  # Log information regarding FTL's embedded event handling queue.
  events = false

  # Log information about script helpers, e.g., due to dhcp-script.
  helper = false

  # Print config parsing details
  config = false

  # Debug monitoring of /etc/pihole filesystem events
  inotify = false

  # Debug monitoring of the webserver (CivetWeb) events
  webserver = false

  # Temporary flag that may print additional information. This debug flag is meant to be
  # used whenever needed for temporary investigations. The logged content may change
  # without further notice at any time.
  extra = false

  # Reserved debug flag
  reserved = false

  # Print information about NTP synchronization
  ntp = false

  # Print information about netlink communication and parsing
  netlink = false

  # Set all debug flags at once. This is a convenience option to enable all debug flags
  # at once. Note that this option is not persistent, setting it to true will enable all
  # *remaining* debug flags but unsetting it will disable *all* debug flags.
  all = false