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42 <div class="refentry" lang="en">
43 <a name="man.dnssec-coverage"></a><div class="titlepage"></div>
44 <div class="refnamediv">
46 <p><span class="application">dnssec-coverage</span> — checks future DNSKEY coverage for a zone</p>
48 <div class="refsynopsisdiv">
50 <div class="cmdsynopsis"><p><code class="command">dnssec-coverage</code> [<code class="option">-K <em class="replaceable"><code>directory</code></em></code>] [<code class="option">-f <em class="replaceable"><code>file</code></em></code>] [<code class="option">-d <em class="replaceable"><code>DNSKEY TTL</code></em></code>] [<code class="option">-m <em class="replaceable"><code>max TTL</code></em></code>] [<code class="option">-r <em class="replaceable"><code>interval</code></em></code>] [<code class="option">-c <em class="replaceable"><code>compilezone path</code></em></code>] [zone]</p></div>
52 <div class="refsect1" lang="en">
53 <a name="id2614656"></a><h2>DESCRIPTION</h2>
54 <p><span><strong class="command">dnssec-coverage</strong></span>
55 verifies that the DNSSEC keys for a given zone or a set of zones
56 have timing metadata set properly to ensure no future lapses in DNSSEC
60 If <code class="option">zone</code> is specified, then keys found in
61 the key repository matching that zone are scanned, and an ordered
62 list is generated of the events scheduled for that key (i.e.,
63 publication, activation, inactivation, deletion). The list of
64 events is walked in order of occurrence. Warnings are generated
65 if any event is scheduled which could cause the zone to enter a
66 state in which validation failures might occur: for example, if
67 the number of published or active keys for a given algorithm drops
68 to zero, or if a key is deleted from the zone too soon after a new
69 key is rolled, and cached data signed by the prior key has not had
70 time to expire from resolver caches.
73 If <code class="option">zone</code> is not specified, then all keys in the
74 key repository will be scanned, and all zones for which there are
75 keys will be analyzed. (Note: This method of reporting is only
76 accurate if all the zones that have keys in a given repository
77 share the same TTL parameters.)
80 <div class="refsect1" lang="en">
81 <a name="id2614750"></a><h2>OPTIONS</h2>
82 <div class="variablelist"><dl>
83 <dt><span class="term">-f <em class="replaceable"><code>file</code></em></span></dt>
85 If a <code class="option">file</code> is specified, then the zone is
86 read from that file; the largest TTL and the DNSKEY TTL are
87 determined directly from the zone data, and the
88 <code class="option">-m</code> and <code class="option">-d</code> options do
89 not need to be specified on the command line.
91 <dt><span class="term">-K <em class="replaceable"><code>directory</code></em></span></dt>
93 Sets the directory in which keys can be found. Defaults to the
94 current working directory.
96 <dt><span class="term">-m <em class="replaceable"><code>maximum TTL</code></em></span></dt>
99 Sets the value to be used as the maximum TTL for the zone or
100 zones being analyzed when determining whether there is a
101 possibility of validation failure. When a zone-signing key is
102 deactivated, there must be enough time for the record in the
103 zone with the longest TTL to have expired from resolver caches
104 before that key can be purged from the DNSKEY RRset. If that
105 condition does not apply, a warning will be generated.
108 The length of the TTL can be set in seconds, or in larger units
109 of time by adding a suffix: 'mi' for minutes, 'h' for hours,
110 'd' for days, 'w' for weeks, 'mo' for months, 'y' for years.
113 This option is mandatory unless the <code class="option">-f</code> has
114 been used to specify a zone file. (If <code class="option">-f</code> has
115 been specified, this option may still be used; it will override
116 the value found in the file.)
119 <dt><span class="term">-d <em class="replaceable"><code>DNSKEY TTL</code></em></span></dt>
122 Sets the value to be used as the DNSKEY TTL for the zone or
123 zones being analyzed when determining whether there is a
124 possibility of validation failure. When a key is rolled (that
125 is, replaced with a new key), there must be enough time
126 for the old DNSKEY RRset to have expired from resolver caches
127 before the new key is activated and begins generating
128 signatures. If that condition does not apply, a warning
132 The length of the TTL can be set in seconds, or in larger units
133 of time by adding a suffix: 'mi' for minutes, 'h' for hours,
134 'd' for days, 'w' for weeks, 'mo' for months, 'y' for years.
137 This option is mandatory unless the <code class="option">-f</code> has
138 been used to specify a zone file, or a default key TTL was
139 set with the <code class="option">-L</code> to
140 <span><strong class="command">dnssec-keygen</strong></span>. (If either of those is true,
141 this option may still be used; it will override the value found
142 in the zone or key file.)
145 <dt><span class="term">-r <em class="replaceable"><code>resign interval</code></em></span></dt>
148 Sets the value to be used as the resign interval for the zone
149 or zones being analyzed when determining whether there is a
150 possibility of validation failure. This value defaults to
151 22.5 days, which is also the default in
152 <span><strong class="command">named</strong></span>. However, if it has been changed
153 by the <code class="option">sig-validity-interval</code> option in
154 <code class="filename">named.conf</code>, then it should also be
158 The length of the interval can be set in seconds, or in larger
159 units of time by adding a suffix: 'mi' for minutes, 'h' for hours,
160 'd' for days, 'w' for weeks, 'mo' for months, 'y' for years.
163 <dt><span class="term">-c <em class="replaceable"><code>compilezone path</code></em></span></dt>
165 Specifies a path to a <span><strong class="command">named-compilezone</strong></span> binary.
170 <div class="refsect1" lang="en">
171 <a name="id2615479"></a><h2>SEE ALSO</h2>
173 <span class="citerefentry"><span class="refentrytitle">dnssec-checkds</span>(8)</span>,
174 <span class="citerefentry"><span class="refentrytitle">dnssec-dsfromkey</span>(8)</span>,
175 <span class="citerefentry"><span class="refentrytitle">dnssec-keygen</span>(8)</span>,
176 <span class="citerefentry"><span class="refentrytitle">dnssec-signzone</span>(8)</span>
179 <div class="refsect1" lang="en">
180 <a name="id2615523"></a><h2>AUTHOR</h2>
181 <p><span class="corpauthor">Internet Systems Consortium</span>
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