NAME¶
ddns-confgen - ddns key generation tool
SYNOPSIS¶
tsig-keygen [-a algorithm]
[-h] [-r randomfile] [name]
ddns-confgen [-a algorithm]
[-h] [-k keyname] [-q]
[-r randomfile] [-s name |
-z zone]
DESCRIPTION¶
tsig-keygen and ddns-confgen are invocation methods
for a utility that generates keys for use in TSIG signing. The resulting
keys can be used, for example, to secure dynamic DNS updates to a zone or
for the rndc command channel.
When run as tsig-keygen, a domain name can be specified on
the command line which will be used as the name of the generated key. If no
name is specified, the default is tsig-key.
When run as ddns-confgen, the generated key is accompanied
by configuration text and instructions that can be used with nsupdate
and named when setting up dynamic DNS, including an example
update-policy statement. (This usage similar to the
rndc-confgen command for setting up command channel security.)
Note that named itself can configure a local DDNS key for
use with nsupdate -l: it does this when a zone is configured with
update-policy local;. ddns-confgen is only needed when a more
elaborate configuration is required: for instance, if nsupdate is to
be used from a remote system.
OPTIONS¶
-a algorithm
Specifies the algorithm to use for the TSIG key.
Available choices are: hmac-md5, hmac-sha1, hmac-sha224, hmac-sha256,
hmac-sha384 and hmac-sha512. The default is hmac-sha256. Options are
case-insensitive, and the "hmac-" prefix may be omitted.
-h
Prints a short summary of options and arguments.
-k keyname
Specifies the key name of the DDNS authentication key.
The default is ddns-key when neither the -s nor -z option
is specified; otherwise, the default is ddns-key as a separate label
followed by the argument of the option, e.g., ddns-key.example.com. The
key name must have the format of a valid domain name, consisting of letters,
digits, hyphens and periods.
-q
(ddns-confgen only.) Quiet mode: Print only the
key, with no explanatory text or usage examples; This is essentially identical
to tsig-keygen.
-r randomfile
Specifies a source of random data for generating the
authorization. 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.
-s name
(ddns-confgen only.) Generate configuration
example to allow dynamic updates of a single hostname. The example
named.conf text shows how to set an update policy for the specified
name using the "name" nametype. The default key name is
ddns-key.name. Note that the "self" nametype cannot be used,
since the name to be updated may differ from the key name. This option cannot
be used with the -z option.
-z zone
(ddns-confgen only.) Generate configuration
example to allow dynamic updates of a zone: The example named.conf text
shows how to set an update policy for the specified zone using the
"zonesub" nametype, allowing updates to all subdomain names within
that zone. This option cannot be used with the -s option.
AUTHOR¶
Internet Systems Consortium, Inc.
COPYRIGHT¶
Copyright © 2009, 2014-2016, 2018 Internet Systems
Consortium, Inc. ("ISC")