1DDNS-CONFGEN(8)                      BIND9                     DDNS-CONFGEN(8)
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NAME

6       ddns-confgen - ddns key generation tool
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SYNOPSIS

9       tsig-keygen [-a algorithm] [-h] [-r randomfile] [name]
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11       ddns-confgen [-a algorithm] [-h] [-k keyname] [-q] [-r randomfile]
12                    [-s name | -z zone]
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DESCRIPTION

15       tsig-keygen and ddns-confgen are invocation methods for a utility that
16       generates keys for use in TSIG signing. The resulting keys can be used,
17       for example, to secure dynamic DNS updates to a zone or for the rndc
18       command channel.
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20       When run as tsig-keygen, a domain name can be specified on the command
21       line which will be used as the name of the generated key. If no name is
22       specified, the default is tsig-key.
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24       When run as ddns-confgen, the generated key is accompanied by
25       configuration text and instructions that can be used with nsupdate and
26       named when setting up dynamic DNS, including an example update-policy
27       statement. (This usage similar to the rndc-confgen command for setting
28       up command channel security.)
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30       Note that named itself can configure a local DDNS key for use with
31       nsupdate -l: it does this when a zone is configured with update-policy
32       local;.  ddns-confgen is only needed when a more elaborate
33       configuration is required: for instance, if nsupdate is to be used from
34       a remote system.
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OPTIONS

37       -a algorithm
38           Specifies the algorithm to use for the TSIG key. Available choices
39           are: hmac-md5, hmac-sha1, hmac-sha224, hmac-sha256, hmac-sha384 and
40           hmac-sha512. The default is hmac-sha256. Options are
41           case-insensitive, and the "hmac-" prefix may be omitted.
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43       -h
44           Prints a short summary of options and arguments.
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46       -k keyname
47           Specifies the key name of the DDNS authentication key. The default
48           is ddns-key when neither the -s nor -z option is specified;
49           otherwise, the default is ddns-key as a separate label followed by
50           the argument of the option, e.g., ddns-key.example.com.  The key
51           name must have the format of a valid domain name, consisting of
52           letters, digits, hyphens and periods.
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54       -q
55           (ddns-confgen only.) Quiet mode: Print only the key, with no
56           explanatory text or usage examples; This is essentially identical
57           to tsig-keygen.
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59       -r randomfile
60           Specifies a source of random data for generating the authorization.
61           If the operating system does not provide a /dev/random or
62           equivalent device, the default source of randomness is keyboard
63           input.  randomdev specifies the name of a character device or file
64           containing random data to be used instead of the default. The
65           special value keyboard indicates that keyboard input should be
66           used.
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68       -s name
69           (ddns-confgen only.) Generate configuration example to allow
70           dynamic updates of a single hostname. The example named.conf text
71           shows how to set an update policy for the specified name using the
72           "name" nametype. The default key name is ddns-key.name. Note that
73           the "self" nametype cannot be used, since the name to be updated
74           may differ from the key name. This option cannot be used with the
75           -z option.
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77       -z zone
78           (ddns-confgen only.) Generate configuration example to allow
79           dynamic updates of a zone: The example named.conf text shows how to
80           set an update policy for the specified zone using the "zonesub"
81           nametype, allowing updates to all subdomain names within that zone.
82           This option cannot be used with the -s option.
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SEE ALSO

85       nsupdate(1), named.conf(5), named(8), BIND 9 Administrator Reference
86       Manual.
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AUTHOR

89       Internet Systems Consortium, Inc.
90
92       Copyright © 2009, 2014-2016, 2018 Internet Systems Consortium, Inc.
93       ("ISC")
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97ISC                               2014-03-06                   DDNS-CONFGEN(8)
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