ddns-confgen — ddns key generation tool
tsig-keygen [-a ] [algorithm-h] [-r ] [name]randomfile
ddns-confgen [-a ] [algorithm-h] [-k ] [keyname-q] [-r ] [ -s randomfilename | -z zone ]
tsig-keygen and ddns-confgen are invocation methods for a utility that generates keys for use in TSIG signing. The resulting keys can be used, for example, to secure dynamic DNS updates to a zone or for the rndc command channel.
When run as tsig-keygen, a domain name
can be specified on the command line which will be used as
the name of the generated key. If no name is specified,
the default is tsig-key.
When run as ddns-confgen, the generated key is accompanied by configuration text and instructions that can be used with nsupdate and named when setting up dynamic DNS, including an example update-policy statement. (This usage similar to the rndc-confgen command for setting up command channel security.)
Note that named itself can configure a local DDNS key for use with nsupdate -l: it does this when a zone is configured with update-policy local;. 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. Options are case-insensitive, and the "hmac-" prefix may be omitted.
Prints a short summary of options and arguments.
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.
(ddns-confgen only.) Quiet mode: Print only the key, with no explanatory text or usage examples; This is essentially identical to tsig-keygen.
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
(ddns-confgen only.)
Generate configuration example to allow dynamic updates
of a single hostname. 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
(ddns-confgen only.)
Generate configuration example to allow dynamic updates
of a zone: 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 9.11.0b1