1zone <string> [ <class> ] { 2 type mirror; 3 allow-notify { <address_match_element>; ... }; 4 allow-query { <address_match_element>; ... }; 5 allow-query-on { <address_match_element>; ... }; 6 allow-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... }; 7 allow-update-forwarding { <address_match_element>; ... }; 8 also-notify [ port <integer> ] [ source ( <ipv4_address> | * ) ] [ source-v6 ( <ipv6_address> | * ) ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; 9 check-names ( fail | warn | ignore ); 10 database <string>; 11 file <quoted_string>; 12 ixfr-from-differences <boolean>; 13 journal <quoted_string>; 14 masterfile-format ( raw | text ); 15 masterfile-style ( full | relative ); 16 max-ixfr-ratio ( unlimited | <percentage> ); 17 max-journal-size ( default | unlimited | <sizeval> ); 18 max-records <integer>; 19 max-records-per-type <integer>; 20 max-refresh-time <integer>; 21 max-retry-time <integer>; 22 max-transfer-idle-in <integer>; 23 max-transfer-idle-out <integer>; 24 max-transfer-time-in <integer>; 25 max-transfer-time-out <integer>; 26 max-types-per-name <integer>; 27 min-refresh-time <integer>; 28 min-retry-time <integer>; 29 multi-master <boolean>; 30 notify ( explicit | master-only | primary-only | <boolean> ); 31 notify-delay <integer>; 32 notify-source ( <ipv4_address> | * ); 33 notify-source-v6 ( <ipv6_address> | * ); 34 primaries [ port <integer> ] [ source ( <ipv4_address> | * ) ] [ source-v6 ( <ipv6_address> | * ) ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; 35 request-expire <boolean>; 36 request-ixfr <boolean>; 37 transfer-source ( <ipv4_address> | * ); 38 transfer-source-v6 ( <ipv6_address> | * ); 39 try-tcp-refresh <boolean>; 40 zero-no-soa-ttl <boolean>; 41 zone-statistics ( full | terse | none | <boolean> ); 42}; 43