Tribblix: manual page: ddns-confgen.8

DDNS-CONFGEN(8) BIND 9 DDNS-CONFGEN(8)

NAME

ddns-confgen - ddns key generation tool

SYNOPSIS

ddns-confgen [-a algorithm] [-h] [-k keyname] [-q] [-s name] [-z
zone]

DESCRIPTION

ddns-confgen is an 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.

The key name can specified using -k parameter and defaults to
ddns-key. 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 is 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.

OPTIONS

-a algorithm
This option 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. Options are case-insensitive, and the "hmac-"
prefix may be omitted.

-h This option prints a short summary of options and arguments.

-k keyname
This option 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 This option enables quiet mode, which prints only the key,
with no explanatory text or usage examples. This is
essentially identical to tsig-keygen.

-s name
This option generates a 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.

-z zone
This option generates a 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.

AUTHOR

Internet Systems Consortium

COPYRIGHT