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<!DOCTYPE html>
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<title>Jagornet DHCP Server 4.0: Community Edition User Guide</title>
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<body class="book">
<div id="header">
<h1>Jagornet DHCP Server 4.0: Community Edition User Guide</h1>
<div class="details">
<span id="author" class="author">A. Gregory Rabil</span><br>
<span id="email" class="email"><a href="mailto:[email protected]">[email protected]</a></span><br>
</div>
<div id="toc" class="toc">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel1">
<li><a href="#_introduction">Introduction</a>
<ul class="sectlevel2">
<li><a href="#_welcome">Welcome</a></li>
<li><a href="#_features">Features</a></li>
</ul>
</li>
<li><a href="#_getting_started">Getting Started</a>
<ul class="sectlevel2">
<li><a href="#_system_requirements">System requirements</a></li>
<li><a href="#_installation">Installation</a></li>
<li><a href="#_running_the_server">Running the Server</a></li>
<li><a href="#_logging">Logging</a></li>
</ul>
</li>
<li><a href="#_configuration">Configuration</a>
<ul class="sectlevel2">
<li><a href="#_hierarchy">Hierarchy</a></li>
<li><a href="#_server_policies">Server Policies</a></li>
<li><a href="#_channel_resources">Channel Resources</a></li>
<li><a href="#_lease_database">Lease Database</a></li>
<li><a href="#_binding_manager">Binding Manager</a></li>
<li><a href="#_dynamic_dns_updates">Dynamic DNS Updates</a></li>
<li><a href="#_protocol_settings">Protocol Settings</a></li>
<li><a href="#_dhcpv4_policies">DHCPv4 Policies</a></li>
<li><a href="#_dhcpv6_policies">DHCPv6 Policies</a></li>
<li><a href="#_high_availability">High Availability</a></li>
<li><a href="#_rest_api">REST API</a></li>
<li><a href="#_dhcp_options">DHCP Options</a></li>
<li><a href="#_generic_options">Generic Options</a></li>
<li><a href="#_filters">Filters</a></li>
<li><a href="#_links">Links</a></li>
<li><a href="#_pools">Pools</a></li>
<li><a href="#_static_bindings">Static Bindings</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>A. Gregory Rabil <a href="mailto:[email protected]">[email protected]</a>
Copyright © 2022 <a href="http://jagornet.com">Jagornet Technologies, LLC</a>
2022-08-02</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_introduction">Introduction</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_welcome">Welcome</h3>
<div class="paragraph">
<p>Welcome to Jagornet DHCP Server Community Edition Version 4.0.
Please visit these links for the latest news and information on Jagornet DHCP Server.</p>
</div>
<div class="paragraph">
<p><a href="http://www.jagornet.com">Jagornet Technologies Website</a></p>
</div>
<div class="paragraph">
<p><a href="https://github.com/jagornet/dhcp">Jagornet DHCP Community Server on Github</a></p>
</div>
</div>
<div class="sect2">
<h3 id="_features">Features</h3>
<div class="paragraph">
<p>Jagornet DHCP Server is an open source Dynamic Host Configuration Protocol server for
IPv4 (DHCPv4) and IPv6 (DHCPv6) implemented in Java.
The server supports the following features:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Standards compliant DHCPv4 server</p>
</li>
<li>
<p>Core DHCPv4 RFCs:</p>
<div class="ulist">
<ul>
<li>
<p>DHCPv4 - <a href="http://www.ietf.org/rfc/rfc2131.txt">RFC 2131</a></p>
</li>
<li>
<p>DHCPv4 Options - <a href="http://www.ietf.org/rfc/rfc2132.txt">RFC 2132</a></p>
</li>
</ul>
</div>
</li>
<li>
<p>Certified IPv6 Phase II DHCPv6 server - <a href="http://www.ipv6ready.org">IPv6 Ready Logo</a></p>
</li>
<li>
<p>Core DHCPv6 RFCs:</p>
<div class="ulist">
<ul>
<li>
<p>Stateful DHCPv6 - <a href="http://www.ietf.org/rfc/rfc3315.txt">RFC 3315</a></p>
</li>
<li>
<p>Prefix Delegation - <a href="http://www.ietf.org/rfc/rfc3633.txt">RFC 3633</a></p>
</li>
<li>
<p>DNS Options - <a href="http://www.ietf.org/rfc/rfc3646.txt">RFC 3646</a></p>
</li>
<li>
<p>Stateless DHCPv6 - <a href="http://www.ietf.org/rfc/rfc3736.txt">RFC 3736</a></p>
</li>
</ul>
</div>
</li>
<li>
<p>Other</p>
<div class="ulist">
<ul>
<li>
<p>High Availability (HA) - Primary/Backup failover</p>
</li>
<li>
<p>Dynamic DNS for DHCPv4/v6 - <a href="http://www.ietf.org/rfc/rfc4703.txt">RFC 4703</a>, <a href="http://www.ietf.org/rfc/rfc4704.txt">RFC 4704</a></p>
</li>
<li>
<p>Highly-scalable, multithreaded architecture using <a href="http://netty.io">Netty</a></p>
</li>
<li>
<p>Flexible XML/JSON/YAML configuration file format - <a href="https://raw.githubusercontent.com/jagornet/dhcp-docs/main/dhcpserver.xsd">Schema</a></p>
</li>
<li>
<p>Open API 3.0 REST API using <a href="https://jersey.github.io">Jersey</a></p>
</li>
<li>
<p>Optimized Docker/OCI Images using <a href="https://github.com/GoogleContainerTools/jib">Jib</a></p>
</li>
</ul>
</div>
</li>
</ul>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_getting_started">Getting Started</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_system_requirements">System requirements</h3>
<div class="paragraph">
<p>Jagornet DHCP Server requires any platform with a certified Java 8+ runtime environment.</p>
</div>
<div class="paragraph">
<p>The server has been successfully tested on Linux (RHEL/CentOS), Windows and Mac OS
using the Oracle JRE 8 and OpenJDK 8 for the respective platforms.</p>
</div>
</div>
<div class="sect2">
<h3 id="_installation">Installation</h3>
<div class="paragraph">
<p>Java 8+ runtime must be available on the host where the Jagornet DHCP server will be
installed. The JAVA_HOME environment variable should be set to the home directory of
your Java 8+ JRE.</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Create the installation directory on the host system and expand the compressed
installation file for your target platform.</p>
<div class="ulist">
<ul>
<li>
<p>Linux/Unix/Mac</p>
<div class="ulist">
<ul>
<li>
<p>Installation folder: <code>/opt/jagornet</code></p>
</li>
<li>
<p>Compressed install file: <code>jagornet-dhcpserver-dist-4.0.0-all.tar.gz</code></p>
</li>
<li>
<p><code>JAGORNET_DHCP_HOME=/opt/jagornet/jagornet-dhcpserver-dist-4.0.0</code></p>
</li>
</ul>
</div>
</li>
<li>
<p>Windows</p>
<div class="ulist">
<ul>
<li>
<p>Installation folder: <code>C:\jagornet</code></p>
</li>
<li>
<p>Compressed install file: <code>jagornet-dhcpserver-dist-4.0.0-all.zip</code></p>
</li>
<li>
<p><code>JAGORNET_DHCP_HOME=C:\jagornet\jagornet-dhcpserver-dist-4.0.0</code></p>
</li>
</ul>
</div>
</li>
</ul>
</div>
</li>
<li>
<p>After extracting the compressed files, a jagornet-dhcpserver-dist-4.0.0 directory will
be created in the installation folder, with the following contents.</p>
<div class="ulist">
<ul>
<li>
<p><code>JAGORNET_DHCP_HOME/bin</code> - executable command line files. See the section on <a href="#_running_the_server">Running the Server</a>.</p>
</li>
<li>
<p><code>JAGORNET_DHCP_HOME/config</code> - configuration files. See the section on Configuration.</p>
</li>
<li>
<p><code>JAGORNET_DHCP_HOME/db</code> - database directory. See the section on Binding Database.</p>
</li>
<li>
<p><code>JAGORNET_DHCP_HOME/docs</code> - documentation files.</p>
</li>
<li>
<p><code>JAGORNET_DHCP_HOME/lib</code> - Java library files.</p>
</li>
<li>
<p><code>JAGORNET_DHCP_HOME/log</code> - server output files. See the section on Logging.</p>
</li>
</ul>
</div>
</li>
</ol>
</div>
</div>
<div class="sect2">
<h3 id="_running_the_server">Running the Server</h3>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
To start the Jagornet DHCP Server, you must have superuser or administrator
access rights on the host system because the server must bind to privileged port
numbers 67 for DHCPv4 and 547 for DHCPv6 to service client requests. Optionally,
the server can be instructed to bind to different port numbers for testing purposes
only. See the <a href="#_startup_options">Startup Options</a> for more information.
</td>
</tr>
</table>
</div>
<div class="admonitionblock important">
<table>
<tr>
<td class="icon">
<div class="title">Important</div>
</td>
<td class="content">
Ensure that the host system’s firewall, if any, is configured to
enable inbound and outbound traffic for the UDP ports of the DHCPv4 and DHCPv6 server.
</td>
</tr>
</table>
</div>
<div class="admonitionblock important">
<table>
<tr>
<td class="icon">
<div class="title">Important</div>
</td>
<td class="content">
Ensure that DHCP relay agents on network routers are configured to relay
DHCP traffic from the client subnet(s) to the IP address of the Jagornet DHCP server.
Enable DHCPv4 and DHCPv6 UDP port traffic on all intervening network equipment.
</td>
</tr>
</table>
</div>
<div class="sect3">
<h4 id="_startup_options">Startup Options</h4>
<div class="paragraph">
<p>The main Java class of the Jagornet DHCP Server supports the following usage:</p>
</div>
<div class="literalblock">
<div class="content">
<pre>usage: com.jagornet.dhcp.server.JagornetDhcpServer [options]
Jagornet DHCP Server Community Edition 4.0.0
Copyright Jagornet Technologies 2009-2022. All Rights Reserved.
-4b,--v4bcast <interface> DHCPv4 broadcast interface (default = none).
Use this option to specify the interface for
the server to receive and send broadcast
DHCPv4 packets. The default IPv4 address on
the specified interface will be used for
determining the DHCPv4 client link within
the server configuration file.
-4p,--v4port <portnum> DHCPv4 Port number (default = 67).
-4u,--v4ucast <addresses> DHCPv4 Unicast addresses (default = all IPv4
addresses). Use this option to instruct the
server to bind to a specific list of IPv4
addresses, separated by spaces. These
addresses should be configured on one or
more DHCPv4 relay agents connected to DHCPv4
client links.
-6m,--v6mcast <interfaces> DHCPv6 Multicast interfaces (default =
none). Use this option without arguments to
instruct the server to bind to all
multicast-enabled IPv6 interfaces on the
host. Optionally, use arguments to list
specific interfaces, separated by spaces.
-6p,--v6port <portnum> DHCPv6 Port number (default = 547).
-6u,--v6ucast <addresses> DHCPv6 Unicast addresses (default = all IPv6
addresses). Use this option to instruct the
server to bind to a specific list of global
IPv6 addresses, separated by spaces. These
addresses should be configured on one or
more DHCPv6 relay agents connected to DHCPv6
client links.
-?,--help Show this help page.
-c,--configfile <filename> Configuration file (default =
/Users/agrabil/opt/gitlocal/jagornet-dhcp/Ja
gornet-DHCP/dhcp-server/config/dhcpserver.xm
l).
-ha,--haddr <address> HTTPS address (default = all IP addresses).
Use this option to instruct the server to
bind to a specific IP address for HTTPS
communications. Set the value to 'none'
(without quotes) to disable HTTPS for
standalone server.
-hp,--hport <portnum> HTTPS Port number (default = 9067).
-li,--list-interfaces Show detailed host interface list, then
exit.
-tc,--test-configfile <filename> Test configuration file, then exit.
-v,--version Show version information, then exit.</pre>
</div>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
Users should NOT directly invoke the main Java class, but are encouraged
to use the wrapper scripts which ensure the proper environment, classpath and
Java VM arguments. See the following sections for Linux/Unix/Mac or Windows
host systems.
</td>
</tr>
</table>
</div>
</div>
<div class="sect3">
<h4 id="_linux_mac">Linux/Mac</h4>
<div class="paragraph">
<p>The $JAGORNET_DHCP_HOME/bin/dhcpserver script can be used to operate the server
from a command shell. This script supports the following options:</p>
</div>
<div class="paragraph">
<p><code>start [startup options]</code> - starts the server with any startup options provided.</p>
</div>
<div class="paragraph">
<p><code>stop</code> - stops the server.</p>
</div>
<div class="paragraph">
<p><code>restart [startup options]</code> - stop and start the server.</p>
</div>
<div class="paragraph">
<p><code>status</code> - check if the server is running.</p>
</div>
<div class="paragraph">
<p><code>version</code> - display server version and exit. A convenience option which can be used instead of 'start -v' or 'start --version'.</p>
</div>
<div class="paragraph">
<p><code>test-configfile <configfile></code> - test server configuration file and exit. A convenience option instead of 'start -tc <filename>' or 'start --test-configfile <filename>'.</p>
</div>
<div class="paragraph">
<p><code>list-interfaces</code> - list host interfaces and exit. A convenience method instead of 'start -li' or 'start --list-interfaces'.</p>
</div>
<div class="paragraph">
<p>Startup examples:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Display the server version and exit (any of the following):</p>
<div class="literalblock">
<div class="content">
<pre>$JAGORNET_DHCP_HOME/bin/dhcpserver version
$JAGORNET_DHCP_HOME/bin/dhcpserver start -v
$JAGORNET_DHCP_HOME/bin/dhcpserver start --version</pre>
</div>
</div>
</li>
<li>
<p>Display the startup options and exit (any of the following):</p>
<div class="literalblock">
<div class="content">
<pre>$JAGORNET_DHCP_HOME/bin/dhcpserver start -?
$JAGORNET_DHCP_HOME/bin/dhcpserver start --help</pre>
</div>
</div>
</li>
<li>
<p>Start the server with the default options (DHCPv4 unicast on all interfaces, no DHCPv4 broadcast, DHCPv6 unicast on all interfaces, no DHCPv6 multicast):</p>
<div class="literalblock">
<div class="content">
<pre>$JAGORNET_DHCP_HOME/bin/dhcpserver start</pre>
</div>
</div>
</li>
<li>
<p>Start the server on a test DHCPv4 port with support for broadcast on the IPv4 broadcast-enabled interface named 'eth0':</p>
<div class="literalblock">
<div class="content">
<pre>$JAGORNET_DHCP_HOME/bin/dhcpserver start -4p 10067 -4b eth0</pre>
</div>
</div>
</li>
<li>
<p>Start the server on a test DHCPv6 port with support for multicast on all IPv6 multicast-enabled interfaces:</p>
<div class="literalblock">
<div class="content">
<pre>$JAGORNET_DHCP_HOME/bin/dhcpserver start -6p 10547 -6m</pre>
</div>
</div>
</li>
<li>
<p>Start the server with support for DHCPv4 broadcast on the interface named 'eth0' and DHCPv6 multicast on the interface named 'eth1':</p>
<div class="literalblock">
<div class="content">
<pre>$JAGORNET_DHCP_HOME/bin/dhcpserver start -4b eth0 -6m eth1</pre>
</div>
</div>
</li>
<li>
<p>Start the server with an alternate configuration file, one specific unicast address, and two specific multicast interfaces:</p>
<div class="literalblock">
<div class="content">
<pre>$JAGORNET_DHCP_HOME/bin/dhcpserver start -c conf/my-dhcpserver.xml -6u 2001:db8::1 -6m eth0 eth1</pre>
</div>
</div>
</li>
</ol>
</div>
</div>
<div class="sect3">
<h4 id="_windows">Windows</h4>
<div class="sect4">
<h5 id="_windows_service">Windows Service</h5>
<div class="paragraph">
<p>Jagornet DHCP Server can operate as a Microsoft Windows Service courtesy of
<a href="http://yajsw.sourceforge.net">Yet Another Java Service Wrapper (YAJSW)</a>.
Startup options must be provided in <code>JAGORNET_DHCP_HOME\bin\yajsw-stable-11.0\conf\wrapper.conf</code>.
Edit this file using a standard text editor (i.e. notepad.exe), and locate the following set of commented properties:</p>
</div>
<div class="literalblock">
<div class="content">
<pre># Application parameters. Add parameters as needed starting from 1
# YAJSW: to specify the main class please use wrapper.java.app.mainclass=
#wrapper.app.parameter.1=
#wrapper.app.parameter.2=
#wrapper.app.parameter.#=
Provide desired startup options by adding uncommented wrapper.app.parameter.# entries for each option and each option value. For example:</pre>
</div>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Start the server on a test DHCPv4 port with support for broadcast on the IPv4 broadcast-enabled interface named 'eth0':</p>
<div class="literalblock">
<div class="content">
<pre>wrapper.app.parameter.1=-4p