NAME

       dnssec-coverage - checks future DNSKEY coverage for a zone

SYNOPSIS

       dnssec-coverage [-K directory] [-l length] [-f file] [-d DNSKEY TTL] [-m max TTL]
                       [-r interval] [-c compilezone 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, Inc.

COPYRIGHT

       Copyright © 2013-2016 Internet Systems Consortium, Inc. ("ISC")