1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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5 | %general-entities;
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6 |
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7 | <!ENTITY dhcp-download-http "http://gd.tuwien.ac.at/infosys/servers/isc/dhcp/dhcp-&dhcp-version;.tar.gz">
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8 | <!ENTITY dhcp-download-ftp "ftp://ftp.isc.org/isc/dhcp/dhcp-&dhcp-version;.tar.gz">
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9 | <!ENTITY dhcp-size "852 KB">
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10 | <!ENTITY dhcp-buildsize "29.6 MB">
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11 | <!ENTITY dhcp-time "0.23 SBU">
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12 | ]>
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13 |
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14 | <sect1 id="dhcp" xreflabel="DHCP-&dhcp-version;">
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15 | <sect1info>
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16 | <othername>$LastChangedBy$</othername>
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17 | <date>$Date$</date>
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18 | </sect1info>
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19 | <?dbhtml filename="dhcp.html"?>
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20 | <title><acronym>DHCP</acronym>-&dhcp-version;</title>
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21 |
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22 | <sect2>
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23 | <title>Introduction to <application><acronym>DHCP</acronym></application></title>
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24 |
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25 | <para>The <application><acronym>DHCP</acronym></application> package contains
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26 | both the client and server programs for <acronym>DHCP</acronym>.
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27 | <command>dhclient</command> (the client) is useful for connecting your computer
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28 | to a network which uses <acronym>DHCP</acronym> to assign network addresses.
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29 | <command>dhcpd</command> (the server) is useful for assigning network addresses
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30 | on your private network.</para>
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31 |
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32 | <sect3><title>Package information</title>
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33 | <itemizedlist spacing='compact'>
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34 | <listitem><para>Download (HTTP): <ulink
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35 | url="&dhcp-download-http;"/></para></listitem>
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36 | <listitem><para>Download (FTP): <ulink
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37 | url="&dhcp-download-ftp;"/></para></listitem>
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38 | <listitem><para>Download size: &dhcp-size;</para></listitem>
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39 | <listitem><para>Estimated Disk space required:
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40 | &dhcp-buildsize;</para></listitem>
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41 | <listitem><para>Estimated build time:
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42 | &dhcp-time;</para></listitem></itemizedlist>
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43 | </sect3>
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44 |
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45 | <sect3><title><application>dhcp</application> dependencies</title>
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46 | <sect4><title>Required</title>
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47 | <para><xref linkend="net-tools"/>. You may omit net-tools by using the
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48 | following patch to utilize iproute2: <ulink
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49 | url="&patch-root;/dhcp-&dhcp-version;-iproute2-1.patch"/>.</para></sect4>
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50 | </sect3>
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51 |
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52 | </sect2>
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53 |
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54 | <sect2>
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55 | <title>Installation of <application><acronym>DHCP</acronym></application></title>
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56 |
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57 | <note><para>You must have Packet Socket support compiled in the kernel and
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58 | Socket Filtering either compiled in or as a kernel module.</para></note>
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59 |
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60 | <para>Install <application><acronym>DHCP</acronym></application> by running
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61 | the following commands:</para>
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62 |
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63 | <screen><userinput><command>patch -Np1 -i ../dhcp-&dhcp-version;-iproute2-1.patch &&
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64 | ./configure &&
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65 | make &&
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66 | make LIBDIR=/usr/lib INCDIR=/usr/include install</command></userinput></screen>
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67 |
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68 | </sect2>
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69 |
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70 | <sect2>
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71 | <title>Command explanations</title>
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72 |
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73 | <para><parameter>LIBDIR=/usr/lib INCDIR=/usr/include</parameter>: This
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74 | command installs the library and include files in <filename
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75 | class="directory">/usr</filename> instead of <filename
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76 | class="directory">/usr/local</filename>.</para>
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77 |
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78 | </sect2>
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79 |
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80 | <sect2>
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81 | <title>Configuring <application><acronym>DHCP</acronym></application></title>
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82 |
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83 | <sect3><title>Config files</title>
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84 | <para><filename>/etc/dhclient.conf</filename></para>
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85 | </sect3>
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86 |
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87 | <sect3><title>Configuration Information</title>
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88 |
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89 | <para>Information on configuring the <acronym>DHCP</acronym> client can be
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90 | found in <xref linkend="connect-dhcp"/>.</para>
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91 |
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92 | <para>Note that you only need the <acronym>DHCP</acronym> server if
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93 | you want to issue <acronym>LAN</acronym> addresses over your network. The
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94 | <acronym>DHCP</acronym> client doesn't need this script to be used. Also note
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95 | that this script is coded for the <emphasis role="strong">eth1</emphasis>
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96 | interface, which may need to be modified for your hardware configuration.</para>
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97 |
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98 | <para>Install the <filename>/etc/rc.d/init.d/dhcp</filename>
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99 | init script included in the <xref linkend="intro-important-bootscripts"/> package.</para>
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100 |
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101 | <screen><userinput><command>make install-dhcp</command></userinput></screen>
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102 |
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103 | <para>The lease file must exist on startup. The following command will
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104 | satisfy that requirement:</para>
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105 |
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106 | <screen><userinput><command>touch /var/state/dhcp/dhcpd.leases</command></userinput></screen>
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107 |
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108 | <para>The following commands will create a base configuration file for a
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109 | <acronym>DHCP</acronym> server. There are several options that you may want to
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110 | add (information that is passed back to the <acronym>DHCP</acronym> client) and
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111 | those are covered in the man pages for <filename>dhcp.conf</filename>.</para>
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112 |
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113 | <screen><userinput><command>cat > /etc/dhcpd.conf << "EOF"</command>
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114 | default-lease-time 72000;
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115 | max-lease-time 144000;
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116 | ddns-update-style ad-hoc;
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117 |
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118 | subnet <replaceable>[192.168.5.0]</replaceable> netmask <replaceable>[255.255.255.0]</replaceable> {
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119 | range <replaceable>[192.168.5.10] [192.168.5.240]</replaceable>;
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120 | option broadcast-address <replaceable>[195.168.5.255]</replaceable>;
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121 | option routers <replaceable>[192.168.5.1]</replaceable>;
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122 | }
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123 | <command>EOF</command></userinput></screen>
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124 |
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125 | <para>All addresses should be changed to meet your circumstance.</para>
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126 |
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127 | </sect3>
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128 |
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129 | </sect2>
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130 |
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131 | <sect2>
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132 | <title>Contents</title>
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133 |
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134 | <para>The <application><acronym>DHCP</acronym></application> package contains
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135 | <command>dhclient</command>, <command>dhcpd</command> and
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136 | <command>dhcrelay</command>.</para>
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137 |
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138 | </sect2>
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139 |
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140 | <sect2><title>Description</title>
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141 |
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142 | <sect3><title>dhclient</title>
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143 | <para><command>dhclient</command> is the implementation of the
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144 | <acronym>DHCP</acronym> client.</para></sect3>
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145 |
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146 | <sect3><title>dhcpd</title>
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147 | <para><command>dhcpd</command> implements Dynamic Host Configuration Protocol
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148 | (<acronym>DHCP</acronym>) and Internet Bootstrap Protocol
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149 | (<acronym>BOOTP</acronym>) requests for network addresses.</para></sect3>
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150 |
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151 | <sect3><title>dhcrelay</title>
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152 | <para><command>dhcrelay</command> provides a means to accept <acronym>DHCP
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153 | </acronym> and <acronym>BOOTP</acronym> requests on a subnet without a
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154 | <acronym>DHCP</acronym> server and relay them to a <acronym>DHCP</acronym>
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155 | server on another subnet.</para></sect3>
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156 |
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157 | </sect2>
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158 |
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159 | </sect1>
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160 |
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