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+   Copyright (C) 2019-2021 Internet Systems Consortium, Inc. ("ISC")
+
+   This Source Code Form is subject to the terms of the Mozilla Public
+   License, v. 2.0. If a copy of the MPL was not distributed with this
+   file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+   See the COPYRIGHT file distributed with this work for additional
+   information regarding copyright ownership.
+
+
+``kea-dhcp-ddns`` - DHCP-DDNS process in Kea
+--------------------------------------------
+
+Synopsis
+~~~~~~~~
+
+:program:`kea-dhcp-ddns` [**-v**] [**-V**] [**-W**] [**-d**] [**-c** config-file] [**-t** config-file]
+
+Description
+~~~~~~~~~~~
+
+The ``kea-dhcp-ddns`` service process requests an update of DNS mapping
+based on DHCP lease-change events. It runs as a separate process that
+expects to receive Name Change Requests from Kea DHCP servers.
+
+Arguments
+~~~~~~~~~
+
+The arguments are as follows:
+
+``-v``
+   Displays the version.
+
+``-V``
+   Displays the extended version.
+
+``-W``
+   Displays the configuration report.
+
+``-d``
+   Sets the logging level to debug with extra verbosity. This is primarily for
+   development purposes in stand-alone mode.
+
+``-c config-file``
+   Specifies the configuration file with the configuration for the DHCP-DDNS server. It
+   may also contain configuration entries for other Kea services.
+
+``-t config-file``
+   Checks the syntax of the configuration file and reports the first error,
+   if any. Note that not all parameters are completely checked; in
+   particular, a service socket is not opened.
+
+Documentation
+~~~~~~~~~~~~~
+
+Kea comes with an extensive Kea Administrator Reference Manual that covers
+all aspects of running the Kea software - compilation, installation,
+configuration, configuration examples, and much more. Kea also features a
+Kea Messages Manual, which lists all possible messages Kea can print
+with a brief description for each of them. Both documents are
+available in various formats (.txt, .html, .pdf) with the Kea
+distribution. The Kea documentation is available at
+https://kea.readthedocs.io.
+
+Kea source code is documented in the Kea Developer's Guide,
+available at https://reports.kea.isc.org/dev_guide/.
+
+The Kea project website is available at https://kea.isc.org.
+
+Mailing Lists and Support
+~~~~~~~~~~~~~~~~~~~~~~~~~
+
+There are two public mailing lists available for the Kea project. **kea-users**
+(kea-users at lists.isc.org) is intended for Kea users, while **kea-dev**
+(kea-dev at lists.isc.org) is intended for Kea developers, prospective
+contributors, and other advanced users. Both lists are available at
+https://lists.isc.org. The community provides best-effort support
+on both of those lists.
+
+ISC provides professional support for Kea services. See
+https://www.isc.org/kea/ for details.
+
+History
+~~~~~~~
+
+The ``b10-dhcp-ddns`` process was first coded in May 2013 by Thomas
+Markwalder.
+
+Kea became a standalone server and the BIND 10 framework was removed. The
+DHCP-DDNS server binary was renamed to kea-dhcp-ddns in July 2014. Kea
+1.0.0 was released in December 2015.
+
+See Also
+~~~~~~~~
+
+:manpage:`kea-dhcp4(8)`, :manpage:`kea-dhcp6(8)`,
+:manpage:`kea-ctrl-agent(8)`, :manpage:`kea-admin(8)`, :manpage:`keactrl(8)`,
+:manpage:`perfdhcp(8)`, :manpage:`kea-netconf(8)`, :manpage:`kea-lfc(8)`,
+Kea Administrator Reference Manual.