+
+
+
Name
+
dnssec-coverage — checks future DNSKEY coverage for a zone
+
+
+
Synopsis
+
dnssec-coverage [-K directory] [-f file] [-d DNSKEY TTL] [-m max TTL] [-r interval] [-c compilezone path] [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
+
+- -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.
+
- -K
directory
+
+ Sets the directory in which keys can be found. Defaults to the
+ current working directory.
+
- -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 mandatory unless the -f has
+ been used to specify a zone file. (If -f has
+ been specified, this option may still be used; it will overrde
+ the value found in the file.)
+
+
+- -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 mandatory unless the -f has
+ been used to specify a zone file, or a default key TTL was
+ set with the -L to
+ dnssec-keygen. (If either of those is true,
+ this option may still be used; it will overrde the value found
+ in the zone or key file.)
+
+
+- -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.
+
+
+- -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
+
+
+