rndc-confgen - rndc key generation tool
rndc-confgen [-a] [-b keysize] [-c keyfile] [-h] [-k keyname] [-p port]
[-r randomfile] [-s address] [-t chrootdir] [-u user]
rndc-confgen generates configuration files for rndc. It can be used as
a convenient alternative to writing the rndc.conf file and the
corresponding controls and key statements in named.conf by hand.
Alternatively, it can be run with the -a option to set up a rndc.key
file and avoid the need for a rndc.conf file and a controls statement
Do automatic rndc configuration. This creates a file rndc.key in
/etc (or whatever sysconfdir was specified as when BIND was built)
that is read by both rndc and named on startup. The rndc.key file
defines a default command channel and authentication key allowing
rndc to communicate with named on the local host with no further
Running rndc-confgen -a allows BIND 9 and rndc to be used as
drop-in replacements for BIND 8 and ndc, with no changes to the
existing BIND 8 named.conf file.
If a more elaborate configuration than that generated by
rndc-confgen -a is required, for example if rndc is to be used
remotely, you should run rndc-confgen without the -a option and set
up a rndc.conf and named.conf as directed.
Specifies the size of the authentication key in bits. Must be
between 1 and 512 bits; the default is 128.
Used with the -a option to specify an alternate location for
Prints a short summary of the options and arguments to
Specifies the key name of the rndc authentication key. This must be
a valid domain name. The default is rndc-key.
Specifies the command channel port where named listens for
connections from rndc. The default is 953.
Specifies a source of random data for generating the authorization.
If the operating system does not provide a /dev/random or
equivalent device, the default source of randomness is keyboard
input. randomdev specifies the name of a character device or file
containing random data to be used instead of the default. The
special value keyboard indicates that keyboard input should be
Specifies the IP address where named listens for command channel
connections from rndc. The default is the loopback address
Used with the -a option to specify a directory where named will run
chrooted. An additional copy of the rndc.key will be written
relative to this directory so that it will be found by the chrooted
Used with the -a option to set the owner of the rndc.key file
generated. If -t is also specified only the file in the chroot area
has its owner changed.
To allow rndc to be used with no manual configuration, run
To print a sample rndc.conf file and corresponding controls and key
statements to be manually inserted into named.conf, run
rndc(8), rndc.conf(5), named(8), BIND 9 Administrator Reference Manual.
Internet Systems Consortium
Copyright (C) 2004, 2005, 2007, 2009 Internet Systems Consortium, Inc.
Copyright (C) 2001, 2003 Internet Software Consortium.