[named] option 'update-policy' is not allowed in 'slave' zone '???.com'

-- Unit named.service has begun starting up.
Jul 28 09:19:21 n1 bash[27128]: /etc/named.rfc1912.zones:47: option 'update-policy' is not allowed in 'slave' zone '???.com'

(1) 까닭

    Slave 네임 서버에서 update-policy를 쓰는 것은 허용되지 않는다.

(2) 풀기

  /etc/named.rfc1912.zones 파일에 들어간 update-policy 내용을 지우거나 주석문으로 만든다.

...
zone "???.com" IN {
	type slave;
	file "???.com.zone";
	master { ???.???.???.???; }
	...
	update-policy {
		...
	};
};
...

↓

...
zone "???.com" IN {
	type slave;
	file "???.com.zone";
	master { ???.???.???.???; }
	...
	//update-policy {
	//	...
	//};
};
...