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 { <address_match_element>; ... }; 7 allow-update-forwarding { <address_match_element>; ... }; 8 also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ]; ... }; 9 alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; 10 alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; 11 check-names ( fail | warn | ignore ); 12 database <string>; 13 file <quoted_string>; 14 ixfr-from-differences <boolean>; 15 journal <quoted_string>; 16 masterfile-format ( map | raw | text ); 17 masterfile-style ( full | relative ); 18 masters [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ]; ... }; 19 max-ixfr-ratio ( unlimited | <percentage> ); 20 max-journal-size ( default | unlimited | <sizeval> ); 21 max-records <integer>; 22 max-refresh-time <integer>; 23 max-retry-time <integer>; 24 max-transfer-idle-in <integer>; 25 max-transfer-idle-out <integer>; 26 max-transfer-time-in <integer>; 27 max-transfer-time-out <integer>; 28 min-refresh-time <integer>; 29 min-retry-time <integer>; 30 multi-master <boolean>; 31 notify ( explicit | master-only | primary-only | <boolean> ); 32 notify-delay <integer>; 33 notify-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; 34 notify-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; 35 primaries [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ]; ... }; 36 request-expire <boolean>; 37 request-ixfr <boolean>; 38 transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; 39 transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; 40 try-tcp-refresh <boolean>; 41 use-alt-transfer-source <boolean>; 42 zero-no-soa-ttl <boolean>; 43 zone-statistics ( full | terse | none | <boolean> ); 44}; 45