Concise Guide to DNS and BIND, The

The controls Statement

Syntax

controls {
  [ inet ip_addr
    port ip_port
    allow { address_match_list; }; ]
  [ unix path_name
    perm number
    owner number
    group number; ]
};

Definition and Usage

The controls statement declares control channels to be used by system administrators to affect the operation of the local name server. These control channels are used by the ndc utility to send commands to and retrieve non-DNS results from a name server.

A unix control channel is a FIFO in the file system, and access to it is controlled by normal file system permissions. It is created by named with the specified file mode bits (see chmod(1)), user and group owner. Note that, unlike chmod, the mode bits specified for perm will normally have a leading 0 so the ...