DNSSEC-COVERAGE(8)                  BIND 9                  DNSSEC-COVERAGE(8)

NAME
       dnssec-coverage - checks future DNSKEY coverage for a zone

SYNOPSIS
       dnssec-coverage [-Kdirectory] [-llength] [-ffile] [-dDNSKEY TTL] [-mmax
       TTL] [-rinterval] [-ccompilezone path] [-k] [-z] [zone...]

DESCRIPTION
       dnssec-coverage verifies that the DNSSEC keys for a given zone or a set
       of zones have timing metadata set properly to ensure no future lapses
       in DNSSEC coverage.

       If zone is specified, then keys found in the key repository matching
       that zone are scanned, and an ordered list is generated of the events
       scheduled for that key (i.e., publication, activation, inactivation,
       deletion). The list of events is walked in order of occurrence.
       Warnings are generated if any event is scheduled which could cause the
       zone to enter a state in which validation failures might occur: for
       example, if the number of published or active keys for a given
       algorithm drops to zero, or if a key is deleted from the zone too soon
       after a new key is rolled, and cached data signed by the prior key has
       not had time to expire from resolver caches.

       If zone is not specified, then all keys in the key repository will be
       scanned, and all zones for which there are keys will be analyzed.
       (Note: This method of reporting is only accurate if all the zones that
       have keys in a given repository share the same TTL parameters.)

OPTIONS
       -K directory
          Sets the directory in which keys can be found. Defaults to the
          current working directory.

       -f file
          If a file is specified, then the zone is read from that file; the
          largest TTL and the DNSKEY TTL are determined directly from the zone
          data, and the -m and -d options do not need to be specified on the
          command line.

       -l duration
          The length of time to check for DNSSEC coverage. Key events
          scheduled further into the future than duration will be ignored, and
          assumed to be correct.

          The value of duration can be set in seconds, or in larger units of
          time by adding a suffix: mi for minutes, h for hours, d for days, w
          for weeks, mo for months, y for years.

       -m maximum TTL
          Sets the value to be used as the maximum TTL for the zone or zones
          being analyzed when determining whether there is a possibility of
          validation failure. When a zone-signing key is deactivated, there
          must be enough time for the record in the zone with the longest TTL
          to have expired from resolver caches before that key can be purged
          from the DNSKEY RRset. If that condition does not apply, a warning
          will be generated.

          The length of the TTL can be set in seconds, or in larger units of
          time by adding a suffix: mi for minutes, h for hours, d for days, w
          for weeks, mo for months, y for years.

          This option is not necessary if the -f has been used to specify a
          zone file. If -f has been specified, this option may still be used;
          it will override the value found in the file.

          If this option is not used and the maximum TTL cannot be retrieved
          from a zone file, a warning is generated and a default value of 1
          week is used.

       -d DNSKEY TTL
          Sets the value to be used as the DNSKEY TTL for the zone or zones
          being analyzed when determining whether there is a possibility of
          validation failure. When a key is rolled (that is, replaced with a
          new key), there must be enough time for the old DNSKEY RRset to have
          expired from resolver caches before the new key is activated and
          begins generating signatures. If that condition does not apply, a
          warning will be generated.

          The length of the TTL can be set in seconds, or in larger units of
          time by adding a suffix: mi for minutes, h for hours, d for days, w
          for weeks, mo for months, y for years.

          This option is not necessary if -f has been used to specify a zone
          file from which the TTL of the DNSKEY RRset can be read, or if a
          default key TTL was set using ith the -L to dnssec-keygen. If either
          of those is true, this option may still be used; it will override
          the values found in the zone file or the key file.

          If this option is not used and the key TTL cannot be retrieved from
          the zone file or the key file, then a warning is generated and a
          default value of 1 day is used.

       -r resign interval
          Sets the value to be used as the resign interval for the zone or
          zones being analyzed when determining whether there is a possibility
          of validation failure. This value defaults to 22.5 days, which is
          also the default in named. However, if it has been changed by the
          sig-validity-interval option in named.conf, then it should also be
          changed here.

          The length of the interval can be set in seconds, or in larger units
          of time by adding a suffix: mi for minutes, h for hours, d for days,
          w for weeks, mo for months, y for years.

       -k
          Only check KSK coverage; ignore ZSK events. Cannot be used with -z.

       -z
          Only check ZSK coverage; ignore KSK events. Cannot be used with -k.

       -c compilezone path
          Specifies a path to a named-compilezone binary. Used for testing.

SEE ALSO
       dnssec-checkds(8), dnssec-dsfromkey(8), dnssec-keygen(8),
       dnssec-signzone(8)

AUTHOR
       Internet Systems Consortium

COPYRIGHT
       2021, Internet Systems Consortium

9.16.18                           2021-06-18                DNSSEC-COVERAGE(8)