options {
	port @PORT@;
	pid-file "named.pid";
	listen-on { 10.53.0.2; };
	listen-on-v6 { none; };
	dnssec-validation no;
};

key "a" {
	algorithm hmac-sha256;
	secret "FrSt77yPTFx6hTs4i2tKLB9LmE0=";
};

key "b" {
	algorithm hmac-sha256;
	secret "hXfwwwiag2QGqblopofai9NuW28q/1rH4CaTnA==";
};

/*
 * Reference cycles in remote-servers lists must be skipped, not
 * followed: named used to recurse into them endlessly and crash on
 * startup (GL #6287).
 */
primaries "loop-direct" { "loop-direct"; 10.53.0.99 port @PORT@; };
primaries "loop-tail" { 10.53.0.99 port @PORT@; "loop-tail"; };
primaries "loop-a" { "loop-b"; };
primaries "loop-b" { "loop-a"; 10.53.0.99 port @PORT@; };

/* Reusing a list outside the active recursion path is not a cycle. */
primaries "common" { 192.0.2.1; };

zone "cycle-direct" {
	type secondary;
	primaries { "loop-direct"; };
};

zone "cycle-tail" {
	type secondary;
	primaries { "loop-tail"; };
};

zone "cycle-mutual" {
	type secondary;
	primaries { "loop-a"; };
};

zone "repeated-list-references" {
	type secondary;
	primaries {
		"common" key "a";
		"common" key "b";
	};
};