NAME
ddns-confgen - ddns key generation tool
SYNOPSIS
ddns-confgen [-a algorithm] [-h] [-k keyname] [-r randomfile] [-s name
| -z zone] [-q] [name]
DESCRIPTION
ddns-confgen generates a key for use by nsupdate and named. It
simplifies configuration of dynamic zones by generating a key and
providing the nsupdate and named.conf syntax that will be needed to use
it, including an example update-policy statement.
If a domain name is specified on the command line, it will be used in
the name of the generated key and in the sample named.conf syntax. For
example, ddns-confgen example.com would generate a key called
"ddns-key.example.com", and sample named.conf command that could be
used in the zone definition for "example.com".
Note that named itself can configure a local DDNS key for use with
nsupdate -l. ddns-confgen is only needed when a more elaborate
configuration is required: for instance, if nsupdate is to be used from
a remote system.
OPTIONS
-a algorithm
Specifies the algorithm to use for the TSIG key. Available choices
are: hmac-md5, hmac-sha1, hmac-sha224, hmac-sha256, hmac-sha384 and
hmac-sha512. The default is hmac-sha256.
-h
Prints a short summary of the options and arguments to
ddns-confgen.
-k keyname
Specifies the key name of the DDNS authentication key. The default
is ddns-key when neither the -s nor -z option is specified;
otherwise, the default is ddns-key as a separate label followed by
the argument of the option, e.g., ddns-key.example.com. The key
name must have the format of a valid domain name, consisting of
letters, digits, hyphens and periods.
-q
Quiet mode: Print only the key, with no explanatory text or usage
examples.
-r randomfile
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
used.
-s name
Single host mode: The example named.conf text shows how to set an
update policy for the specified name using the "name" nametype. The
default key name is ddns-key.name. Note that the "self" nametype
cannot be used, since the name to be updated may differ from the
key name. This option cannot be used with the -z option.
-z zone
zone mode: The example named.conf text shows how to set an update
policy for the specified zone using the "zonesub" nametype,
allowing updates to all subdomain names within that zone. This
option cannot be used with the -s option.
SEE ALSO
nsupdate(1), named.conf(5), named(8), BIND 9 Administrator Reference
Manual.
AUTHOR
Internet Systems Consortium
COPYRIGHT
Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")