rndc






rndc − name server control utility

rndc [−b source−address] [−c config−file] [−k key−file]
[−s server] [−p port] [−V] [−y key_id] {command}



     rndc controls the operation of a name server. It
supersedes the ndc utility that was provided in old BIND
releases. If rndc is invoked with no command line options or
arguments, it prints a short summary of the supported
commands and the available options and their arguments.

     rndc communicates with the name server over a TCP
connection, sending commands authenticated with digital
signatures. In the current versions of rndc and named, the
only supported authentication algorithm is HMAC−MD5, which
uses a shared secret on each end of the connection. This
provides TSIG−style authentication for the command request
and the name server’s response. All commands sent over the
channel must be signed by a key_id known to the server.

     rndc reads a configuration file to determine how to
contact the name server and decide what algorithm and key it
should use.



     −b source−address
     Use source−address as the source address for the
     connection to the server. Multiple instances are
     permitted to allow setting of both the IPv4 and IPv6
     source addresses.

     −c config−file
     Use config−file as the configuration file instead of
     the default, /etc/rndc.conf.

     −k key−file
     Use key−file as the key file instead of the default,
     /etc/rndc.key. The key in /etc/rndc.key will be used to
     authenticate commands sent to the server if the
     config−file does not exist.

     −s server
     server is the name or address of the server which
     matches a server statement in the configuration file
     for rndc. If no server is supplied on the command line,
     the host named by the default−server clause in the
     options statement of the rndc configuration file will
     be used.

     −p port
     Send commands to TCP port port instead of BIND 9’s









                             ‐2‐


     default control channel port, 953.

     −V
     Enable verbose logging.

     −y key_id
     Use the key key_id from the configuration file.  key_id
     must be known by named with the same algorithm and
     secret string in order for control message validation
     to succeed. If no key_id is specified, rndc will first
     look for a key clause in the server statement of the
     server being used, or if no server statement is present
     for that host, then the default−key clause of the
     options statement. Note that the configuration file
     contains shared secrets which are used to send
     authenticated control commands to name servers. It
     should therefore not have general read or write access.

     For the complete set of commands supported by rndc, see
the BIND 9 Administrator Reference Manual or run rndc
without arguments to see its help message.



     rndc does not yet support all the commands of the BIND
8 ndc utility.

     There is currently no way to provide the shared secret
for a key_id without using the configuration file.

     Several error messages could be clearer.



     rndc.conf(5), rndc−confgen(8), named(8), named.conf(5),
ndc(8), BIND 9 Administrator Reference Manual.



     Internet Systems Consortium

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Inc. ("ISC")
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