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42 <div class=
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43 <a name=
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44 <div class=
"refnamediv">
46 <p><span class=
"application">ddns-confgen
</span> — ddns key generation tool
</p>
48 <div class=
"refsynopsisdiv">
50 <div class=
"cmdsynopsis"><p><code class=
"command">ddns-confgen
</code> [
<code class=
"option">-a
<em class=
"replaceable"><code>algorithm
</code></em></code>] [
<code class=
"option">-h
</code>] [
<code class=
"option">-k
<em class=
"replaceable"><code>keyname
</code></em></code>] [
<code class=
"option">-r
<em class=
"replaceable"><code>randomfile
</code></em></code>] [ -s
<em class=
"replaceable"><code>name
</code></em> | -z
<em class=
"replaceable"><code>zone
</code></em> ] [
<code class=
"option">-q
</code>] [name]
</p></div>
52 <div class=
"refsect1" lang=
"en">
53 <a name=
"id2639866"></a><h2>DESCRIPTION
</h2>
54 <p><span><strong class=
"command">ddns-confgen
</strong></span>
55 generates a key for use by
<span><strong class=
"command">nsupdate
</strong></span>
56 and
<span><strong class=
"command">named
</strong></span>. It simplifies configuration
57 of dynamic zones by generating a key and providing the
58 <span><strong class=
"command">nsupdate
</strong></span> and
<span><strong class=
"command">named.conf
</strong></span>
59 syntax that will be needed to use it, including an example
60 <span><strong class=
"command">update-policy
</strong></span> statement.
63 If a domain name is specified on the command line, it will
64 be used in the name of the generated key and in the sample
65 <span><strong class=
"command">named.conf
</strong></span> syntax. For example,
66 <span><strong class=
"command">ddns-confgen example.com
</strong></span> would
67 generate a key called
"ddns-key.example.com", and sample
68 <span><strong class=
"command">named.conf
</strong></span> command that could be used
69 in the zone definition for
"example.com".
72 Note that
<span><strong class=
"command">named
</strong></span> itself can configure a
73 local DDNS key for use with
<span><strong class=
"command">nsupdate -l
</strong></span>.
74 <span><strong class=
"command">ddns-confgen
</strong></span> is only needed when a
75 more elaborate configuration is required: for instance, if
76 <span><strong class=
"command">nsupdate
</strong></span> is to be used from a remote system.
79 <div class=
"refsect1" lang=
"en">
80 <a name=
"id2640022"></a><h2>OPTIONS
</h2>
81 <div class=
"variablelist"><dl>
82 <dt><span class=
"term">-a
<em class=
"replaceable"><code>algorithm
</code></em></span></dt>
84 Specifies the algorithm to use for the TSIG key. Available
85 choices are: hmac-md5, hmac-sha1, hmac-sha224, hmac-sha256,
86 hmac-sha384 and hmac-sha512. The default is hmac-sha256.
88 <dt><span class=
"term">-h
</span></dt>
90 Prints a short summary of the options and arguments to
91 <span><strong class=
"command">ddns-confgen
</strong></span>.
93 <dt><span class=
"term">-k
<em class=
"replaceable"><code>keyname
</code></em></span></dt>
95 Specifies the key name of the DDNS authentication key.
96 The default is
<code class=
"constant">ddns-key
</code> when neither
97 the
<code class=
"option">-s
</code> nor
<code class=
"option">-z
</code> option is
98 specified; otherwise, the default
99 is
<code class=
"constant">ddns-key
</code> as a separate label
100 followed by the argument of the option, e.g.,
101 <code class=
"constant">ddns-key.example.com.
</code>
102 The key name must have the format of a valid domain name,
103 consisting of letters, digits, hyphens and periods.
105 <dt><span class=
"term">-q
</span></dt>
107 Quiet mode: Print only the key, with no explanatory text or
110 <dt><span class=
"term">-r
<em class=
"replaceable"><code>randomfile
</code></em></span></dt>
112 Specifies a source of random data for generating the
113 authorization. If the operating system does not provide a
114 <code class=
"filename">/dev/random
</code> or equivalent device, the
115 default source of randomness is keyboard input.
116 <code class=
"filename">randomdev
</code> specifies the name of a
117 character device or file containing random data to be used
118 instead of the default. The special value
119 <code class=
"filename">keyboard
</code> indicates that keyboard input
122 <dt><span class=
"term">-s
<em class=
"replaceable"><code>name
</code></em></span></dt>
124 Single host mode: The example
<span><strong class=
"command">named.conf
</strong></span> text
125 shows how to set an update policy for the specified
126 <em class=
"replaceable"><code>name
</code></em>
127 using the
"name" nametype.
128 The default key name is
129 ddns-key.
<em class=
"replaceable"><code>name
</code></em>.
130 Note that the
"self" nametype cannot be used, since
131 the name to be updated may differ from the key name.
132 This option cannot be used with the
<code class=
"option">-z
</code> option.
134 <dt><span class=
"term">-z
<em class=
"replaceable"><code>zone
</code></em></span></dt>
136 zone mode: The example
<span><strong class=
"command">named.conf
</strong></span> text
137 shows how to set an update policy for the specified
138 <em class=
"replaceable"><code>zone
</code></em>
139 using the
"zonesub" nametype, allowing updates to all subdomain
141 that
<em class=
"replaceable"><code>zone
</code></em>.
142 This option cannot be used with the
<code class=
"option">-s
</code> option.
146 <div class=
"refsect1" lang=
"en">
147 <a name=
"id2643772"></a><h2>SEE ALSO
</h2>
148 <p><span class=
"citerefentry"><span class=
"refentrytitle">nsupdate
</span>(
1)
</span>,
149 <span class=
"citerefentry"><span class=
"refentrytitle">named.conf
</span>(
5)
</span>,
150 <span class=
"citerefentry"><span class=
"refentrytitle">named
</span>(
8)
</span>,
151 <em class=
"citetitle">BIND
9 Administrator Reference Manual
</em>.
154 <div class=
"refsect1" lang=
"en">
155 <a name=
"id2643811"></a><h2>AUTHOR
</h2>
156 <p><span class=
"corpauthor">Internet Systems Consortium
</span>
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