[ Bottom of Page | Previous Page | Next Page | Contents | Index | Library Home | Legal | Search ]

Commands Reference, Volume 2

dnssec-signzone Command


DNSSEC zone signing tool.


dnssec-signzone [-a] [-c class] [ -d directory ] [-s start-time] [-e end-time] [-h] [ -i interval ] [ -n nthreads ] [ -o origin ] [ -p ] [-r randomdev] [ -t ] [-v level] zonefile key...



The dnssec-signzone command signs a zone. It generates NXT and SIG records and produces a signed version of the zone. If there is a signedkey file from the zone's parent, the parent's signatures will be incorporated into the generated signed zone file. The security status of delegations from the the signed zone (that is, whether the child zones are secure or not) is determined by the presence or absence of a signedkey file for each child zone.


-a Verify all generated signatures.
-c class Specifies the DNS class of the zone.
-d directory Look for signedkey files in directory as the directory.
-s start-time Specify the date and time when the generated SIG records become valid. This can be either an absolute or relative time. An absolute start time is indicated by a number in YYYYMMDDHHMMSS notation; 20000530144500 denotes 14:45:00 UTC on May 30th, 2000. A relative start time is indicated by +N, which is N seconds from the current time. If no start-time is specified, the current time is used.
-e end-time Specify the date and time when the generated SIG records expire. As with start-time, an absolute time is indicated in YYYYMMDDHHMMSS notation. A time relative to the start time is indicated with +N, which is N seconds from the start time. A time realtive to the current time is indicated with now+N. If no end-time is specified, 30 days from the start time is used as a default.
-f output-file The name of the output file containing the signed zone. The default is to append .signed to the input file.
-h Prints a short summary of the options and arguments to dnssec-signzone.
-i interval When a previously signed zone is passed as input, records may be resigned. The interval option specifies the cycle interval as an offset from the current time (in seconds). If a SIG record expires after the cycle interval, it is retained. Otherwise, it is considered to be expiring soon, and it will be replaced. The default cycle interval is one quarter of the difference between the signature end and start times. So if neither end-time or start-time are specified, dnssec-signzone generates signatures that are valid for 30 days, with a cycle interval of 7.5 days. Therefore, if any existing SIG records are due to expire in less than 7.5 days, they would be replaced.
-n ncpus Specifies the number of threads to use. By default, one thread is started for each detected CPU.
-o origin The zone origin. If not specified, the name of the zone file is assumed to be the origin.
-p Use pseudo-random data when signing the zone. This is faster, but less secure, than using real random data. This option may be useful when signing large zones or when the entropy source is limited.
-r randomdev Specifies the source of randomness. If the operating system does not provide a /dev/random or equivalent device, the default source of randomness is keyboard input. randomdev specifies the name of a character device or file containing random data to be used instead of the default. The special value keyboard indicates that keyboard input should be used.
-t Print statistics at completion.
-v level Sets the debugging level.


zonefile The file containing the zone to be signed. Sets the debugging level.
key The keys used to sign the child's keyset.


The following command signs the example.com zone with the DSA key generated in the dnssec-keygen man page. The zone's keys must be in the zone. If there are signedkey files associated with this zone or any child zones, they must be in the current directory, example.com, the following command would be issued:

dnssec-signzone -o example.com db.example.com Kexample.com.+003+26160

In this example, dnssec-signzone creates the file db.example.com.signed. This file should be referenced in a zone statement in a named.conf file.

Related Information

The dnssec-keygen, dnssec-makekeyset, and dnssec-signkey commands.

BIND 9 Administrator Reference Manual

RFC 2535.

[ Top of Page | Previous Page | Next Page | Contents | Index | Library Home | Legal | Search ]