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       ddns-confgen - ddns key generation tool


       ddns-confgen [-a algorithm] [-h] [-k keyname] [-r randomfile] [-s name
                    | -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 would generate a key called
       "", and sample named.conf command that could be
       used in the zone definition for "".

       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.


       -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.

           Prints a short summary of the options and arguments to

       -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.,  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

       -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

       -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 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.


       nsupdate(1), named.conf(5), named(8), BIND 9 Administrator Reference


       Internet Systems Consortium


       Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")