1DDNS-CONFGEN(8)                     BIND 9                     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] [-s
12       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 to be used as the name of the generated key. If no name is  speci‐
22       fied, the default is tsig-key.
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24       When  run as ddns-confgen, the generated key is accompanied by configu‐
25       ration text and instructions that can be used with nsupdate  and  named
26       when  setting up dynamic DNS, including an example update-policy state‐
27       ment. (This usage is similar to the rndc-confgen command for setting up
28       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 configuration
33       is required: for instance, if nsupdate is to be used from a remote sys‐
34       tem.
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OPTIONS

37       -a algorithm
38              This  option  specifies  the  algorithm to use for the TSIG key.
39              Available  choices  are:   hmac-md5,   hmac-sha1,   hmac-sha224,
40              hmac-sha256,   hmac-sha384,  and  hmac-sha512.  The  default  is
41              hmac-sha256. Options are case-insensitive, and the "hmac-"  pre‐
42              fix may be omitted.
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44       -h     This option prints a short summary of options and arguments.
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46       -k keyname
47              This  option  specifies  the key name of the DDNS authentication
48              key. The default is ddns-key when neither the -s nor  -z  option
49              is  specified;  otherwise, the default is ddns-key as a separate
50              label followed by the argument of the option, e.g., ddns-key.ex‐
51              ample.com.  The  key name must have the format of a valid domain
52              name, consisting of letters, digits, hyphens, and periods.
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54       -q (ddns-confgen only)
55              This option enables quiet mode, which prints only the key,  with
56              no explanatory text or usage examples. This is essentially iden‐
57              tical to tsig-keygen.
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59       -s name (ddns-confgen only)
60              This option generates a configuration example to  allow  dynamic
61              updates  of a single hostname. The example named.conf text shows
62              how to set an update policy for the  specified  name  using  the
63              "name"  nametype.  The  default  key name is ddns-key.name. Note
64              that the "self" nametype cannot be used, since the  name  to  be
65              updated may differ from the key name. This option cannot be used
66              with the -z option.
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68       -z zone (ddns-confgen only)
69              This option generates a configuration example to  allow  dynamic
70              updates  of a zone. The example named.conf text shows how to set
71              an update policy for the  specified  zone  using  the  "zonesub"
72              nametype,  allowing  updates  to all subdomain names within that
73              zone.  This option cannot be used with the -s option.
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SEE ALSO

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

80       Internet Systems Consortium
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83       2021, Internet Systems Consortium
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889.16.16-RH                                                     DDNS-CONFGEN(8)
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