ddns-confgen — ddns key generation tool
ddns-confgen [-a ] [algorithm-h] [-k ] [keyname-r ] [ -s randomfilename | -z zone ] [-q] [name]
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.
algorithmSpecifies 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.
Prints a short summary of the options and arguments to ddns-confgen.
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.
Quiet mode: Print only the key, with no explanatory text or usage examples.
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.
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.
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.
BIND Version 9.9