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DDNS-CONFGEN(8)			    BIND 9		       DDNS-CONFGEN(8)

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 to be used as the name of the generated key. If no name is	speci-
       fied, the default is tsig-key.

       When  run as ddns-confgen, the generated	key is accompanied by configu-
       ration text and instructions that can be	used with nsupdate  and	 named
       when  setting up	dynamic	DNS, including an example update-policy	state-
       ment. (This usage is 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 sys-
       tem.

OPTIONS
       -a algorithm
	      This  option  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-"  pre-
	      fix may be omitted.

       -h     This option prints a short summary of options and	arguments.

       -k keyname
	      This  option  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.ex-
	      ample.com.  The  key name	must have the format of	a valid	domain
	      name, consisting of letters, digits, hyphens, and	periods.

       -q (ddns-confgen	only)
	      This option enables quiet	mode, which prints only	the key,  with
	      no explanatory text or usage examples. This is essentially iden-
	      tical to tsig-keygen.

       -s name (ddns-confgen only)
	      This option generates a 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)
	      This option generates a 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.

SEE ALSO
       nsupdate(1), named.conf(5), named(8), BIND  9  Administrator  Reference
       Manual.

AUTHOR
       Internet	Systems	Consortium

COPYRIGHT
       2021, Internet Systems Consortium

9.16.21				  2021-09-07		       DDNS-CONFGEN(8)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | AUTHOR | COPYRIGHT

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