4.7. ddns-confgen --- TSIG key generator¶
ddns-confgen [-a <algorithm>] [-h] [-k <key-name>] [-q] [-s <name> | -z <zone>]
ddns-confgen generates keys for use in TSIG signing. The resulting keys can be used, for example, to secure dynamic DNS updates to a zone.
-q option is specified, 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
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.
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.
Prints a short summary of options and arguments.
Specifies the key name of the DDNS authentication key. The default is ddns-key when neither the
-zoptions are 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.
Generate configuration example to allow dynamic updates of a single hostname. The example named.conf(5) configuration 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
Generate configuration example to allow dynamic updates of a zone: The example named.conf(5) configuration 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
4.7.4. See also¶
nsupdate(1), named.conf(5), named(8)
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