named.conf - configuration file for named

named.conf is the configuration file for named. Statements are enclosed in braces and terminated with a semi-colon. Clauses in the statements are also semi-colon terminated. The usual comment styles are supported:

C style: /* */

C++ style: // to end of line

Unix style: # to end of line

acl string { address_match_element; ... };

key domain_name {
	algorithm string;
	secret string;
};

masters string [ port integer ] {
	( masters | ipv4_address [port integer] |
	ipv6_address [port integer] ) [ key string ]; ...
};

server ( ipv4_address | ipv6_address ) {
	bogus boolean;
	edns boolean;
	provide-ixfr boolean;
	request-ixfr boolean;
	keys server_key;
	transfers integer;
	transfer-format ( many-answers | one-answer );
	transfer-source ( ipv4_address | * )
		[ port ( integer | * ) ];
	transfer-source-v6 ( ipv6_address | * )
		[ port ( integer | * ) ];
	support-ixfr boolean; // obsolete
};

trusted-keys {
	domain_name flags protocol algorithm key; ... 
};

controls {
	inet ( ipv4_address | ipv6_address | * )
		[ port ( integer | * ) ]
		allow { address_match_element; ... }
		[ keys { string; ... } ];
	unix unsupported; // not implemented
};

logging {
	channel string {
		file log_file;
		syslog optional_facility;
		null;
		stderr;
		severity log_severity;
		print-time boolean;
		print-severity boolean;
		print-category boolean;
	};
	category string { string; ... };
};

lwres {
	listen-on [ port integer ] {
		( ipv4_address | ipv6_address ) [ port integer ]; ...
	};
	view string optional_class;
	search { string; ... };
	ndots integer;
};

options {
	avoid-v4-udp-ports { port; ... };
	avoid-v6-udp-ports { port; ... };
	blackhole { address_match_element; ... };
	coresize size;
	datasize size;
	directory quoted_string;
	dump-file quoted_string;
	files size;
	heartbeat-interval integer;
	host-statistics boolean; // not implemented
	host-statistics-max number; // not implemented
	hostname ( quoted_string | none );
	interface-interval integer;
	listen-on [ port integer ] { address_match_element; ... };
	listen-on-v6 [ port integer ] { address_match_element; ... };
	match-mapped-addresses boolean;
	memstatistics-file quoted_string;
	pid-file ( quoted_string | none );
	port integer;
	querylog boolean;
	recursing-file quoted_string;
	random-device quoted_string;
	recursive-clients integer;
	serial-query-rate integer;
	server-id ( quoted_string | none |;
	stacksize size;
	statistics-file quoted_string;
	statistics-interval integer; // not yet implemented
	tcp-clients integer;
	tcp-listen-queue integer;
	tkey-dhkey quoted_string integer;
	tkey-gssapi-credential quoted_string;
	tkey-domain quoted_string;
	transfers-per-ns integer;
	transfers-in integer;
	transfers-out integer;
	use-ixfr boolean;
	version ( quoted_string | none );
	allow-recursion { address_match_element; ... };
	sortlist { address_match_element; ... };
	topology { address_match_element; ... }; // not implemented
	auth-nxdomain boolean; // default changed
	minimal-responses boolean;
	recursion boolean;
	rrset-order {
		[ class string ] [ type string ]
		[ name quoted_string ] string string; ...
	};
	provide-ixfr boolean;
	request-ixfr boolean;
	rfc2308-type1 boolean; // not yet implemented
	additional-from-auth boolean;
	additional-from-cache boolean;
	query-source querysource4;
	query-source-v6 querysource6;
	cleaning-interval integer;
	min-roots integer; // not implemented
	lame-ttl integer;
	max-ncache-ttl integer;
	max-cache-ttl integer;
	transfer-format ( many-answers | one-answer );
	max-cache-size size_no_default;
	check-names ( master | slave | response )
		( fail | warn | ignore );
	cache-file quoted_string;
	suppress-initial-notify boolean; // not yet implemented
	preferred-glue string;
	dual-stack-servers [ port integer ] {
		( quoted_string [port integer] |
		ipv4_address [port integer] |
		ipv6_address [port integer] ); ...
	}
	edns-udp-size integer;
	root-delegation-only [ exclude { quoted_string; ... } ];
	disable-algorithms string { string; ... };
	dnssec-enable boolean;
	dnssec-lookaside string trust-anchor string;
	dnssec-must-be-secure string boolean;
	dialup dialuptype;
	ixfr-from-differences ixfrdiff;
	allow-query { address_match_element; ... };
	allow-transfer { address_match_element; ... };
	allow-update-forwarding { address_match_element; ... };
	notify notifytype;
	notify-source ( ipv4_address | * ) [ port ( integer | * ) ];
	notify-source-v6 ( ipv6_address | * ) [ port ( integer | * ) ];
	also-notify [ port integer ] { ( ipv4_address | ipv6_address )
		[ port integer ]; ... };
	allow-notify { address_match_element; ... };
	forward ( first | only );
	forwarders [ port integer ] {
		( ipv4_address | ipv6_address ) [ port integer ]; ...
	};
	max-journal-size size_no_default;
	max-transfer-time-in integer;
	max-transfer-time-out integer;
	max-transfer-idle-in integer;
	max-transfer-idle-out integer;
	max-retry-time integer;
	min-retry-time integer;
	max-refresh-time integer;
	min-refresh-time integer;
	multi-master boolean;
	sig-validity-interval integer;
	transfer-source ( ipv4_address | * )
		[ port ( integer | * ) ];
	transfer-source-v6 ( ipv6_address | * )
		[ port ( integer | * ) ];
	alt-transfer-source ( ipv4_address | * )
		[ port ( integer | * ) ];
	alt-transfer-source-v6 ( ipv6_address | * )
		[ port ( integer | * ) ];
	use-alt-transfer-source boolean;
	zone-statistics boolean;
	key-directory quoted_string;
	allow-v6-synthesis { address_match_element; ... }; // obsolete
	deallocate-on-exit boolean; // obsolete
	fake-iquery boolean; // obsolete
	fetch-glue boolean; // obsolete
	has-old-clients boolean; // obsolete
	maintain-ixfr-base boolean; // obsolete
	max-ixfr-log-size size; // obsolete
	multiple-cnames boolean; // obsolete
	named-xfer quoted_string; // obsolete
	serial-queries integer; // obsolete
	treat-cr-as-space boolean; // obsolete
	use-id-pool boolean; // obsolete
};

view string optional_class {
	match-clients { address_match_element; ... };
	match-destinations { address_match_element; ... };
	match-recursive-only boolean;
	key string {
		algorithm string;
		secret string;
	};
	zone string optional_class {
		...
	};
	server ( ipv4_address | ipv6_address ) {
		...
	};
	trusted-keys {
		string integer integer integer quoted_string; ...
	};
	allow-recursion { address_match_element; ... };
	sortlist { address_match_element; ... };
	topology { address_match_element; ... }; // not implemented
	auth-nxdomain boolean; // default changed
	minimal-responses boolean;
	recursion boolean;
	rrset-order {
		[ class string ] [ type string ]
		[ name quoted_string ] string string; ...
	};
	provide-ixfr boolean;
	request-ixfr boolean;
	rfc2308-type1 boolean; // not yet implemented
	additional-from-auth boolean;
	additional-from-cache boolean;
	query-source querysource4;
	query-source-v6 querysource6;
	cleaning-interval integer;
	min-roots integer; // not implemented
	lame-ttl integer;
	max-ncache-ttl integer;
	max-cache-ttl integer;
	transfer-format ( many-answers | one-answer );
	max-cache-size size_no_default;
	check-names ( master | slave | response )
		( fail | warn | ignore );
	cache-file quoted_string;
	suppress-initial-notify boolean; // not yet implemented
	preferred-glue string;
	dual-stack-servers [ port integer ] {
		( quoted_string [port integer] |
		ipv4_address [port integer] |
		ipv6_address [port integer] ); ...
	};
	edns-udp-size integer;
	root-delegation-only [ exclude { quoted_string; ... } ];
	disable-algorithms string { string; ... };
	dnssec-enable boolean;
	dnssec-lookaside string trust-anchor string;
	dnssec-must-be-secure string boolean;
	dialup dialuptype;
	ixfr-from-differences ixfrdiff;
	allow-query { address_match_element; ... };
	allow-transfer { address_match_element; ... };
	allow-update-forwarding { address_match_element; ... };
	notify notifytype;
	notify-source ( ipv4_address | * ) [ port ( integer | * ) ];
	notify-source-v6 ( ipv6_address | * ) [ port ( integer | * ) ];
	also-notify [ port integer ] { ( ipv4_address | ipv6_address )
		[ port integer ]; ... };
	allow-notify { address_match_element; ... };
	forward ( first | only );
	forwarders [ port integer ] {
		( ipv4_address | ipv6_address ) [ port integer ]; ...
	};
	max-journal-size size_no_default;
	max-transfer-time-in integer;
	max-transfer-time-out integer;
	max-transfer-idle-in integer;
	max-transfer-idle-out integer;
	max-retry-time integer;
	min-retry-time integer;
	max-refresh-time integer;
	min-refresh-time integer;
	multi-master boolean;
	sig-validity-interval integer;
	transfer-source ( ipv4_address | * )
		[ port ( integer | * ) ];
	transfer-source-v6 ( ipv6_address | * )
		[ port ( integer | * ) ];
	alt-transfer-source ( ipv4_address | * )
		[ port ( integer | * ) ];
	alt-transfer-source-v6 ( ipv6_address | * )
		[ port ( integer | * ) ];
	use-alt-transfer-source boolean;
	zone-statistics boolean;
	key-directory quoted_string;
	allow-v6-synthesis { address_match_element; ... }; // obsolete
	fetch-glue boolean; // obsolete
	maintain-ixfr-base boolean; // obsolete
	max-ixfr-log-size size; // obsolete
};

zone string optional_class {
	type ( master | slave | stub | hint |
		forward | delegation-only );
	file quoted_string;
	masters [ port integer ] {
		( masters |
		ipv4_address [port integer] |
		ipv6_address [ port integer ] ) [ key string ]; ...
	};
	database string;
	delegation-only boolean;
	check-names ( fail | warn | ignore );
	dialup dialuptype;
	ixfr-from-differences boolean;
	allow-query { address_match_element; ... };
	allow-transfer { address_match_element; ... };
	allow-update { address_match_element; ... };
	allow-update-forwarding { address_match_element; ... };
	update-policy {
		( grant | deny ) string
		( name | subdomain | wildcard | self ) string
		rrtypelist; ...
	};
	notify notifytype;
	notify-source ( ipv4_address | * ) [ port ( integer | * ) ];
	notify-source-v6 ( ipv6_address | * ) [ port ( integer | * ) ];
	also-notify [ port integer ] { ( ipv4_address | ipv6_address )
		[ port integer ]; ... };
	allow-notify { address_match_element; ... };
	forward ( first | only );
	forwarders [ port integer ] {
		( ipv4_address | ipv6_address ) [ port integer ]; ...
	};
	max-journal-size size_no_default;
	max-transfer-time-in integer;
	max-transfer-time-out integer;
	max-transfer-idle-in integer;
	max-transfer-idle-out integer;
	max-retry-time integer;
	min-retry-time integer;
	max-refresh-time integer;
	min-refresh-time integer;
	multi-master boolean;
	sig-validity-interval integer;
	transfer-source ( ipv4_address | * )
		[ port ( integer | * ) ];
	transfer-source-v6 ( ipv6_address | * )
		[ port ( integer | * ) ];
	alt-transfer-source ( ipv4_address | * )
		[ port ( integer | * ) ];
	alt-transfer-source-v6 ( ipv6_address | * )
		[ port ( integer | * ) ];
	use-alt-transfer-source boolean;
	zone-statistics boolean;
	key-directory quoted_string;
	ixfr-base quoted_string; // obsolete
	ixfr-tmp-file quoted_string; // obsolete
	maintain-ixfr-base boolean; // obsolete
	max-ixfr-log-size size; // obsolete
	pubkey integer integer integer quoted_string; // obsolete
};

/etc/named.conf

named(8), rndc(8), BIND 9 Adminstrators Reference Manual().