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.. ddns-confgen - ddns key generation tool ddns-confgen [-a algorithm] [-h] [-k keyname] [-q] [-s name] [-z zone] 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. NDENT 0.0

-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 \(dqhmac-\(dq prefix may be omitted. NINDENT NDENT 0.0

-h This option prints a short summary of options and arguments. NINDENT NDENT 0.0

-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. NINDENT NDENT 0.0

-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. NINDENT NDENT 0.0

-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 \(dqname\(dq nametype. The default key name is ddns-key.name. Note that the \(dqself\(dq 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. NINDENT NDENT 0.0

-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 \(dqzonesub\(dq nametype, allowing updates to all subdomain names within that zone. This option cannot be used with the \%-s option. NINDENT

\%nsupdate(1), \%named.conf(5), \%named(8), BIND 9 Administrator Reference Manual. Internet Systems Consortium 2024, Internet Systems Consortium Generated by docutils manpage writer.
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