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. Warn-
ings 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 cur-
rent 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 sched-
uled further into the future than duration will be ignored, and as-
sumed 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 be-
gins 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 de-
fault 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 de-
fault 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-sign-
zone(8)
AUTHOR
Internet Systems Consortium
COPYRIGHT
2020, Internet Systems Consortium
9.16.8-Debian 2020-10-13 DNSSEC-COVERAGE(8)