knot.conf(5)

NAME

knot.conf - Configuration file manual for Knot DNS server.

SYNOPSIS

knot.conf

DESCRIPTION
knot.conf serves as an example of the configuration for knotc(8) and knotd(8).

EXAMPLE

 #
 # There are 7 main sections of this config file:
 # system, interfaces, remotes, groups, zones, control and log
 #
 # Section 'system' contains general options for the server
 system {
  # Identity of the server (see RFC 4892).
  # Used for answer to CH TXT 'id.server' or 'hostname.bind'
  # Use string format "text"
  # Or on|off. When 'on', FQDN hostname will be used as default.
  identity off;
  # Version of the server (see RFC 4892).
  # Used for answer to CH TXT 'version.server' or 'version.bind'
  # Use string format "text"
  # Or on|off. When 'on', current server version will be used as default.
  version off;
  # Server identifier
  # Use string format "text"
  # Or hexstring 0x01ab00
  # Or on|off. When 'on', FQDN hostname will be used as default.
  nsid off;
  # This is a default directory to place slave zone files, journals etc.
  # default: ${localstatedir}/lib/knot, configured with --with-storage
  storage "/var/lib/knot";
  # Directory for storing run-time data
  # e.g. PID file and control sockets
  # default: ${localstatedir}/run/knot, configured with --with-rundir
  rundir "/var/run/knot";
  # Number of workers per interface
  # This option is used to force number of threads used per interface
  # Default: unset (auto-estimates optimal value from the number of online CPUs)
  # workers 3;
  # User for running server
  # May also specify user.group (e.g. knot.users)
  # user knot.users;
  # Maximum idle time between requests on a TCP connection
  # It is also possible to suffix with unit size [s/m/h/d]
  # f.e. 1s = 1 second, 1m = 1 minute, 1h = 1 hour, 1d = 1 day
  # Default: 60s
  max-conn-idle 60s;
  # Maximum time between newly accepted TCP connection and first query
  # This is useful to disconnect inactive connections faster
  # It is also possible to suffix with unit size [s/m/h/d]
  # f.e. 1s = 1 second, 1m = 1 minute, 1h = 1 hour, 1d = 1 day
  # Default: 10s
  max-conn-handshake 10s;
  # Maximum time to wait for a reply to SOA query
  # It is also possible to suffix with unit size [s/m/h/d]
  # f.e. 1s = 1 second, 1m = 1 minute, 1h = 1 hour, 1d = 1 day
  # Default: 10s
  max-conn-reply 10s;
  # Number of parallel transfers
  # This number also includes pending SOA queries
  # Minimal value is number of CPUs
  # Default: 10
  transfers 10;
  # Rate limit
  # in queries / second
  # Default: off (=0)
  rate-limit 0;
  # Rate limit bucket size
  # Number of hashtable buckets, set to reasonable value as default.
  # We chose a reasonably large prime number as it's used for hashtable size,
  # it is recommended to do so as well due to better distribution.
  # Rule of thumb is to set it to about 1.2 * (maximum_qps)
  # Memory cost is approx. 32B per bucket
  # Default: 393241
  rate-limit-size 393241;
  # Rate limit SLIP
  # Each Nth blocked response will be sent as truncated, this is a way to allow
  # legitimate requests to get a chance to reconnect using TCP
  # Default: 1
  rate-limit-slip 1;
  # Maximum EDNS0 UDP payload size
  # max-udp-payload 4096;
 }
 # Includes can be placed anywhere at any level in the configuration file. The
 # file name can be relative to current file or absolute.
 #
 # This include includes keys which are commented out in next section.
 include "knot.keys.conf";
 # Section 'keys' contains list of TSIG keys
 #keys {
 #
 # # TSIG key
 # #
 # # format: name key-type "<key>";
 # # where key-type may be one of the following:
 # # hmac-md5
 # # hmac-sha1
 # # hmac-sha224
 # # hmac-sha256
 # # hmac-sha384
 # # hmac-sha512
 # # and <key> is the private key
 # key0.server0 hmac-md5 "Wg==";
 #
 # # TSIG key for zone
 # key0.example.com hmac-md5 "==gW";
 #}
 # Section 'interfaces' contains definitions of listening interfaces.
 interfaces {
  # Interface entry
  #
  # Format 1: <name> { address <address>; [port <port>;] }
  ipv4 { # <name> is an arbitrary symbolic name
    address 127.0.0.1; # <address> may be ither IPv4 or IPv6 address
    port 53531; # port is required for XFR/IN and NOTIFY/OUT
  }
  # Format 2: <name> { address <address>@<port>; }
  # shortipv4 {
  # address 127.0.0.1@53532;
  #}
  # Format 1 (IPv6 interface)
  # ipv6 {
  # address ::1@53533;
  # }
  # Format 2 (IPv6 interface)
  # ipv6b {
  # address [::1]@53534;
  # }
 }
 # Section 'remotes' contains symbolic names for remote servers.
 # Syntax for 'remotes' is the same as for 'interfaces'.
 remotes {
  # Remote entry
  #
  # Format 1: <name> { address <address>; [port <port>;] }
  server0 { # <name> is an arbitrary symbolic name
    address 127.0.0.1; # <address> may be ither IPv4 or IPv6 address
    port 53531; # port is optional (default: 53)
    key key0.server0; # (optional) specification of TSIG key associated for this remote
    via ipv4; # (optional) source interface for queries
    via 82.35.64.59; # (optional) source interface for queries, direct IPv4
    via [::cafe]; # (optional) source interface for queries, direct IPv6
  }
  # Format 2: <name> { address <address>@<port>; }
  server1 {
    address 127.0.0.1@53001;
  }
  admin-alice {
    address 192.168.100.1;
  }
  admin-bob {
    address 192.168.100.2;
  }
 }
 groups {
  admins { admin-alice, admin-bob }
 }
 # Section 'control' specifies on which interface to listen for RC commands
 control {
  # Default: $(run_dir)/knot.sock
  listen-on "knot.sock";
  # As an alternative, you can use an IPv4/v6 address and port
  # Same syntax as for 'interfaces' items
  # listen-on { address 127.0.0.1@5533; }
  # Specifies ACL list for remote control
  # Same syntax as for ACLs in zones
  # List of remotes or groups delimited by comma
  # Notice: keep in mind that ACLs bear no effect with UNIX sockets
  # allow server0, admins;
 }
 # Section 'zones' contains information about zones to be served.
 zones {
  # Shared options for all listed zones
  #
  # Build differences from zone file changes. EXPERIMENTAL feature.
  # Possible values: on|off
  # Default value: off
  ixfr-from-differences off;
  # Enable semantic checks for all zones (if 'on')
  # Possible values: on|off
  # Default value: off
  semantic-checks off;
  # Disable ANY type queries for authoritative answers (if 'on')
  # Possible values: on|off
  # Default value: off
  disable-any off;
  # NOTIFY response timeout
  # Possible values: <1,...> (seconds)
  # Default value: 60
  notify-timeout 60;
  # Number of retries for NOTIFY
  # Possible values: <1,...>
  # Default value: 5
  notify-retries 5;
  # Timeout for syncing changes from zone database to zonefile
  # Possible values: <1..INT_MAX> (seconds)
  # Default value: 1h (1 hour)
  # It is also possible to suffix with unit size [s/m/h/d]
  # f.e. 1s = 1 day, 1m = 1 minute, 1h = 1 hour, 1d = 1 day
  zonefile-sync 1h;
  # File size limit for IXFR journal
  # Possible values: <1..INT_MAX>
  # Default value: N/A (infinite)
  # It is also possible to suffix with unit size [k/M/G]
  # f.e. 1k, 100M, 2G
  ixfr-fslimit 1G;
  # Zone entry
  #
  # Format: <zone-name> { file "<path-to-zone-file>"; }
  example.com { # <zone-name> is the DNS name of the zone (zone root)
    # <path-to-zone-file> may be either absolute or relative, in which case
    # it is considered relative to the current directory from which the server
    # was started.
    file "samples/example.com.zone";
    # Build differences from zone file changes
    # Possible values: on|off
    # Default value: off
    ixfr-from-differences off;
    # Disable ANY type queries for authoritative answers (if 'on')
    # Possible values: on|off
    # Default value: off
    disable-any off;
    # Enable zone semantic checks
    # Possible values: on|off
    # Default value: off
    semantic-checks on;
    # NOTIFY response timeout (specific for current zone)
    # Possible values: <1,...> (seconds)
    # Default value: 60
    notify-timeout 60;
    # Number of retries for NOTIFY (specific for current zone)
    # Possible values: <1,...>
    # Default value: 5
    notify-retries 5;
    # Timeout for syncing changes from zone database to zonefile
    # Possible values: <1..INT_MAX> (seconds)
    # Default value: inherited from zones.zonefile-sync
    # It is also possible to suffix with unit size [s/m/h/d]
    # f.e. 1s = 1 second, 1m = 1 minute, 1h = 1 hour, 1d = 1 day
    zonefile-sync 1h;
    # XFR master server
    xfr-in server0;
    # ACL list of XFR slaves
    xfr-out server0, server1;
    # ACL list of servers allowed to send NOTIFY queries
    notify-in server0;
    # List of servers to send NOTIFY to
    notify-out server0, server1;
    # List of servers to allow UPDATE queries
    update-in server0, admins;
  }
 }
 # Section 'log' configures logging of server messages.
 #
 # Logging recognizes 3 symbolic names of log devices:
 # stdout - Standard output
 # stderr - Standard error output
 # syslog - Syslog
 #
 # In addition, arbitrary number of log files may be specified (see below).
 #
 # Log messages are characterized by severity and category.
 # Supported severities:
 # debug - Debug messages. Must be turned on at compile time.
 # info - Informational messages.
 # notice - Notices and hints.
 # warning - Warnings. An action from the operator may be required.
 # error - Recoverable error. Some action should be taken.
 # fatal - Non-recoverable errors resulting in server shutdown.
 # (Not supported yet.)
 # all - All severities.
 #
 # Categories designate the source of the log message and roughly correspond
 # to server modules
 # Supported categories:
 # server - Messages related to general operation of the server.
 # zone - Messages related to zones, zone parsing and loading.
 # answering - Messages regarding query processing and response creation.
 # any - All categories
 #
 # More severities (separated by commas) may be listed for each category.
 # All applicable severities must be listed.
 # (I.e. specifying 'error' severity does mean: 'log error messages',
 # and NOT 'log all messages of severity error and above'.)
 #
 # Default settings (in case there are no entries in 'log' section or the section
 # is missing at all):
 #
 # stderr { any error; }
 # syslog { any error; }
 log {
  # Log entry
  #
  # Format 1:
  # <log> {
  # <category1> <severity1> [, <severity2> ...];
  # <category2> <severity1> [, <severity2> ...];
  # ...
  # }
  syslog { # <log> is a symbolic name of a log device (see above)
    # log errors of any category
    any error; # for <category> and <severity> see above
    # log also warnings and notices from category 'zone'
    zone warning, notice;
    # log info from server
    server info;
  }
  # Log fatal, warnings and errors to stderr
  stderr {
    any error, warning;
  }
  # Format 2:
  # file <path> {
  # <category1> <severity1> [, <severity2> ...];
  # <category2> <severity1> [, <severity2> ...];
  # }
  file "/tmp/knot-sample/knotd.debug" { # <path> is absolute or relative path to log file
    server debug;
  }
 }

SEE ALSO

knotd(8), knotc(8)