[0931098] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[6732c094] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[0931098] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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[697cb83f] | 6 |
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[ac02266] | 7 | <!ENTITY dhcp-download-http " ">
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[697cb83f] | 8 | <!ENTITY dhcp-download-ftp "ftp://ftp.isc.org/isc/dhcp/&dhcp-version;/dhcp-&dhcp-version;.tar.gz">
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| 9 | <!ENTITY dhcp-md5sum "0ca7181024651f6323951d5498c8020b">
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| 10 | <!ENTITY dhcp-size "7.9 MB">
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| 11 | <!ENTITY dhcp-buildsize "150 MB">
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| 12 | <!ENTITY dhcp-time "1.2 SBU">
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[0931098] | 13 | ]>
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| 14 |
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[40330fcd] | 15 | <sect1 id="dhcp" xreflabel="DHCP-&dhcp-version;">
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[6ad98e12] | 16 | <?dbhtml filename="dhcp.html"?>
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| 17 |
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| 18 | <sect1info>
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| 19 | <othername>$LastChangedBy$</othername>
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| 20 | <date>$Date$</date>
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| 21 | </sect1info>
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| 22 |
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| 23 | <title>DHCP-&dhcp-version;</title>
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| 24 |
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| 25 | <indexterm zone="dhcp">
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[697cb83f] | 26 | <primary sortas="a-DHCP">DHCP</primary>
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[6ad98e12] | 27 | </indexterm>
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| 28 |
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| 29 | <sect2 role="package">
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[697cb83f] | 30 | <title>Introduction to ISC DHCP</title>
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[6ad98e12] | 31 |
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[697cb83f] | 32 | <para>
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| 33 | The <application>ISC DHCP</application> package contains both the client and
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| 34 | server programs for DHCP. <command>dhclient</command> (the client) is
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| 35 | used for connecting to a network which uses DHCP to assign network
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| 36 | addresses. <command>dhcpd</command> (the server) is used for assigning
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| 37 | network addresses on private networks.
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| 38 | </para>
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[6ad98e12] | 39 |
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[697cb83f] | 40 | &lfs71_checked;
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[fa3e12e1] | 41 |
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[6ad98e12] | 42 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 43 | <itemizedlist spacing="compact">
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| 44 | <listitem>
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[697cb83f] | 45 | <para>
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| 46 | Download (HTTP): <ulink url="&dhcp-download-http;"/>
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| 47 | </para>
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[6ad98e12] | 48 | </listitem>
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| 49 | <listitem>
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[697cb83f] | 50 | <para>
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| 51 | Download (FTP): <ulink url="&dhcp-download-ftp;"/>
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| 52 | </para>
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[6ad98e12] | 53 | </listitem>
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| 54 | <listitem>
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[697cb83f] | 55 | <para>
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| 56 | Download MD5 sum: &dhcp-md5sum;
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| 57 | </para>
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[6ad98e12] | 58 | </listitem>
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| 59 | <listitem>
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[697cb83f] | 60 | <para>
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| 61 | Download size: &dhcp-size;
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| 62 | </para>
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[6ad98e12] | 63 | </listitem>
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| 64 | <listitem>
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[697cb83f] | 65 | <para>
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| 66 | Estimated disk space required: &dhcp-buildsize;
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| 67 | </para>
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[6ad98e12] | 68 | </listitem>
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| 69 | <listitem>
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[697cb83f] | 70 | <para>
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| 71 | Estimated build time: &dhcp-time;
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| 72 | </para>
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[6ad98e12] | 73 | </listitem>
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| 74 | </itemizedlist>
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| 75 |
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[413bf97] | 76 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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[697cb83f] | 77 | <itemizedlist spacing="compact">
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[b89d0335] | 78 | <listitem>
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[697cb83f] | 79 | <para>
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| 80 | Required Patch:
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| 81 | <ulink url="&patch-root;/dhcp-&dhcp-version;-client-script-1.patch"/>
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| 82 | </para>
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[b89d0335] | 83 | </listitem>
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[413bf97] | 84 | <listitem>
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[697cb83f] | 85 | <para>
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| 86 | Optional Patch:
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| 87 | <ulink url="&patch-root;/dhcp-&dhcp-version;-missing_ipv6-1.patch"/>
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| 88 | </para>
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[413bf97] | 89 | </listitem>
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| 90 | </itemizedlist>
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| 91 |
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[3cb0c57] | 92 | <para condition="html" role="usernotes">User Notes:
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[697cb83f] | 93 | <ulink url="&blfs-wiki;/dhcp"/>
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| 94 | </para>
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[6ad98e12] | 95 | </sect2>
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| 96 |
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[697cb83f] | 97 | <sect2 role="kernel" id="dhcp-kernel">
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[6ad98e12] | 98 | <title>Kernel Configuration</title>
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| 99 |
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[697cb83f] | 100 | <para>
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| 101 | You must have Packet Socket support (Networking Support ⇒
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| 102 | Networking Options ⇒ Packet Socket) compiled into the kernel.
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| 103 | If you do not have IPv6 support (Networking Support ⇒
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| 104 | Networking Options ⇒ The IPv6 Protocol) compiled in, then you
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| 105 | must use the missing_ipv6 patch.
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| 106 | </para>
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[6ad98e12] | 107 |
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| 108 | <indexterm zone="dhcp dhcp-kernel">
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[697cb83f] | 109 | <primary sortas="d-DHCP">DHCP</primary>
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[6ad98e12] | 110 | </indexterm>
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| 111 |
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| 112 | </sect2>
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| 113 |
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| 114 | <sect2 role="installation">
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[697cb83f] | 115 | <title>Installation of ISC DHCP</title>
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[6ad98e12] | 116 |
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[697cb83f] | 117 | <para>
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| 118 | If you have not compiled IPv6 support into the kernel, apply the
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| 119 | missing_ipv6 patch:
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| 120 | </para>
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[b89d0335] | 121 |
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[fa3e12e1] | 122 | <screen><userinput>patch -Np1 -i ../dhcp-&dhcp-version;-missing_ipv6-1.patch</userinput></screen>
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[b89d0335] | 123 |
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[697cb83f] | 124 | <para>Install <application>ISC DHCP</application> by running
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[6ad98e12] | 125 | the following commands:</para>
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| 126 |
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[697cb83f] | 127 | <screen><userinput>patch -Np1 -i ../dhcp-&dhcp-version;-client-script-1.patch &&
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| 128 | CFLAGS="-D_PATH_DHCLIENT_SCRIPT='\"/sbin/dhclient-script\"' \
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| 129 | -D_PATH_DHCPD_CONF='\"/etc/dhcp/dhcpd.conf\"' \
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| 130 | -D_PATH_DHCLIENT_CONF='\"/etc/dhcp/dhclient.conf\"'" \
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| 131 | ./configure --prefix=/usr \
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| 132 | --sysconfdir=/etc/dhcp \
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| 133 | --localstatedir=/var \
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| 134 | --with-srv-lease-file=/var/lib/dhcpd/dhcpd.leases \
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| 135 | --with-srv6-lease-file=/var/lib/dhcpd/dhcpd6.leases \
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| 136 | --with-cli-lease-file=/var/lib/dhclient/dhclient.leases \
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| 137 | --with-cli6-lease-file=/var/lib/dhclient/dhclient6.leases &&
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| 138 | make</userinput></screen>
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| 139 |
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| 140 | <para>
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| 141 | To test the results, issue: <command>make check</command>
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| 142 | </para>
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| 143 |
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| 144 | <para>
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| 145 | If you only want to install the <application>ISC DHCP</application> client,
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| 146 | issue the following commands as the
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| 147 | <systemitem class="username">root</systemitem> user:
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| 148 | </para>
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| 149 |
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| 150 | <screen role="root"><userinput>make -C client install &&
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| 151 | mv -v /usr/sbin/dhclient /sbin &&
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| 152 | install -v -m755 client/scripts/linux /sbin/dhclient-script</userinput></screen>
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[fa3e12e1] | 153 |
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[697cb83f] | 154 | <para>
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| 155 | Skip to <xref linkend="dhclient-config"/> in order to configure the client
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| 156 | </para>
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[6ad98e12] | 157 |
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[697cb83f] | 158 | <para>
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| 159 | If you only want to install the <application>ISC DHCP</application> server,
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| 160 | issue the following command as the
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| 161 | <systemitem class="username">root</systemitem> user:
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| 162 | </para>
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[fa3e12e1] | 163 |
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[697cb83f] | 164 | <screen role="root"><userinput>make -C server install</userinput></screen>
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[fa3e12e1] | 165 |
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[697cb83f] | 166 | <para>
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| 167 | Skip to <xref linkend="dhcpd-config"/> in order to configure the server.
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| 168 | </para>
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[275b1da] | 169 |
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[697cb83f] | 170 | <para>
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| 171 | Alternatively, you can install whole package which includes the client,
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| 172 | server, relay, static libraries and development headers by running the
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| 173 | following commands as the
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| 174 | <systemitem class="username">root</systemitem> user:
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| 175 | </para>
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[04a6794] | 176 |
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[697cb83f] | 177 | <screen role="root"><userinput>make install &&
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| 178 | mv -v /usr/sbin/dhclient /sbin &&
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[ac02266] | 179 | install -v -m755 client/scripts/linux /sbin/dhclient-script</userinput></screen>
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[fa3e12e1] | 180 |
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[697cb83f] | 181 | </sect2>
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[fa3e12e1] | 182 |
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[697cb83f] | 183 | <sect2 role="configuration">
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| 184 | <title>Configuring ISC DHCP</title>
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[fa3e12e1] | 185 |
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[697cb83f] | 186 | <sect3 id="dhcp-config">
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| 187 | <title>Config Files</title>
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[fa3e12e1] | 188 |
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[697cb83f] | 189 | <para>
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| 190 | <filename>/etc/dhcp/dhclient.conf</filename> and
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| 191 | <filename>/etc/dhcp/dhcpd.conf</filename>
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| 192 | </para>
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[0931098] | 193 |
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[697cb83f] | 194 | <indexterm zone="dhcp dhcp-config">
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| 195 | <primary sortas="e-etc-dhcp-dhclient.conf">/etc/dhcp/dhclient.conf</primary>
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| 196 | </indexterm>
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[0931098] | 197 |
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[697cb83f] | 198 | <indexterm zone="dhcp dhcp-config">
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| 199 | <primary sortas="e-etc-dhcp-dhcpd.conf">/etc/dhcp/dhcpd.conf</primary>
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| 200 | </indexterm>
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[0931098] | 201 |
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[697cb83f] | 202 | </sect3>
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[fa3e12e1] | 203 |
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[697cb83f] | 204 | <sect3 id="dhclient-config">
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| 205 | <title>Client Configuration</title>
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| 206 |
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| 207 | <para>
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| 208 | Create basic <filename>/etc/dhcp/dhclient.conf</filename>
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| 209 | by running the following command as the
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| 210 | <systemitem class="username">root</systemitem> user:
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| 211 | </para>
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| 212 |
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| 213 | <screen role="root"><userinput>cat > /etc/dhcp/dhclient.conf << "EOF"
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| 214 | <literal># Begin /etc/dhcp/dhclient.conf
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| 215 | #
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| 216 | # Basic dhclient.conf(5)
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| 217 |
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| 218 | #prepend domain-name-servers 127.0.0.1;
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| 219 | request subnet-mask, broadcast-address, time-offset, routers,
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| 220 | domain-name, domain-name-servers, domain-search, host-name,
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| 221 | netbios-name-servers, netbios-scope, interface-mtu,
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| 222 | ntp-servers;
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| 223 | require subnet-mask, domain-name-servers;
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| 224 | #timeout 60;
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| 225 | #retry 60;
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| 226 | #reboot 10;
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| 227 | #select-timeout 5;
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| 228 | #initial-interval 2;
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| 229 |
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| 230 | # End /etc/dhcp/dhclient.conf</literal>
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| 231 | EOF</userinput></screen>
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[fa3e12e1] | 232 |
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[697cb83f] | 233 | <para>
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| 234 | See <command>man 5 dhclient.conf</command> for additional options.
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| 235 | </para>
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[fa3e12e1] | 236 |
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[697cb83f] | 237 | <para>
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| 238 | Now create the <filename class="directory">/var/lib/dhclient</filename>
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| 239 | directory which will contain DHCP Client leases by running the following
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| 240 | command as the <systemitem class="username">root</systemitem> user:
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| 241 | </para>
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[fa3e12e1] | 242 |
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[697cb83f] | 243 | <screen role="root"><userinput>install -v -dm 755 /var/lib/dhclient</userinput></screen>
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[fa3e12e1] | 244 |
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[697cb83f] | 245 | <para>
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| 246 | At this point you can test if <command>dhclient</command> is
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| 247 | behaving as expected by running the following command as the
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| 248 | <systemitem class="username">root</systemitem> user:
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| 249 | </para>
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[0931098] | 250 |
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[697cb83f] | 251 | <screen role="root"><userinput>dhclient <replaceable><eth0></replaceable></userinput></screen>
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[0931098] | 252 |
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[697cb83f] | 253 | <para>
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| 254 | Replace <replaceable><eth0></replaceable> with your
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| 255 | desired interface. If you want more verbose output, add the
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| 256 | <command>-v</command> parameter to the command above.
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| 257 | </para>
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[0931098] | 258 |
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[697cb83f] | 259 | <para id="dhclient-service">
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| 260 | If you want to configure network interfaces at boot using
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| 261 | <command>dhclient</command>, you need to install the
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| 262 | <filename>/lib/services/dhclient</filename> script
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| 263 | included in <xref linkend="bootscripts"/> package:
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| 264 | </para>
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[04a6794] | 265 |
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[697cb83f] | 266 | <screen role="root"><userinput>make install-service-dhclient</userinput></screen>
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[04a6794] | 267 |
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[697cb83f] | 268 | <indexterm zone="dhcp dhclient-service">
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| 269 | <primary sortas="f-dhclient">dhclient (service script)</primary>
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[6ad98e12] | 270 | </indexterm>
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[04a6794] | 271 |
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[697cb83f] | 272 | <para id="dhclient-ifconfig">
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| 273 | Next, create the <filename>/etc/sysconfig/ifconfig.eth0</filename>
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| 274 | configuration file with the following commands as the
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| 275 | <systemitem class="username">root</systemitem> user:
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| 276 | </para>
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| 277 |
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| 278 | <screen role="root"><userinput>cat > /etc/sysconfig/ifconfig.eth0 << "EOF"
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| 279 | <literal>ONBOOT="yes"
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| 280 | IFACE="eth0"
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| 281 | SERVICE="dhclient"
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| 282 | DHCP_START=""
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| 283 | DHCP_STOP=""
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| 284 |
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| 285 | # Set PRINTIP="yes" to have the script print
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| 286 | # the DHCP assigned IP address
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| 287 | PRINTIP="no"
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| 288 |
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| 289 | # Set PRINTALL="yes" to print the DHCP assigned values for
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| 290 | # IP, SM, DG, and 1st NS. This requires PRINTIP="yes".
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| 291 | PRINTALL="no"</literal>
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| 292 | EOF</userinput></screen>
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| 293 |
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| 294 | <indexterm zone="dhcp dhclient-ifconfig">
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| 295 | <primary sortas="e-etc-sysconfig-...-dhclient">/etc/sysconfig/ifconfig.eth0</primary>
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[6ad98e12] | 296 | </indexterm>
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[0931098] | 297 |
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[697cb83f] | 298 | <para>
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| 299 | Adjust the file to suit your needs.
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| 300 | </para>
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[0931098] | 301 |
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[697cb83f] | 302 | <para>
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| 303 | For more information on the appropriate <envar>DHCP_START</envar>
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| 304 | and <envar>DHCP_STOP</envar> values see
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| 305 | <command>man 8 dhclient</command>.
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| 306 | </para>
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[0931098] | 307 |
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[697cb83f] | 308 | </sect3>
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[0931098] | 309 |
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[697cb83f] | 310 | <sect3 id="dhcpd-config">
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| 311 | <title>Server Configuration</title>
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[4774914f] | 312 |
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[697cb83f] | 313 | <para>
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| 314 | Note that you only need the DHCP server if you want to issue
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| 315 | LAN addresses over your network. The DHCP client doesn't need
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| 316 | the server in order to function properly.
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| 317 | </para>
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[04a6794] | 318 |
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[697cb83f] | 319 | <para>
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| 320 | Start with creating <filename>/etc/dhcp/dhcpd.conf</filename>
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| 321 | by running the following command as the
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| 322 | <systemitem class="username">root</systemitem> user:
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| 323 | </para>
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[0931098] | 324 |
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[697cb83f] | 325 | <screen role="root"><userinput>cat > /etc/dhcp/dhcpd.conf << "EOF"
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| 326 | <literal># Begin /etc/dhcp/dhcpd.conf
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| 327 | #
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| 328 | # Example dhcpd.conf(5)
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[0931098] | 329 |
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[697cb83f] | 330 | # Use this to enble / disable dynamic dns updates globally.
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| 331 | ddns-update-style none;
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[0931098] | 332 |
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[697cb83f] | 333 | # option definitions common to all supported networks...
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| 334 | option domain-name "example.org";
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| 335 | option domain-name-servers ns1.example.org, ns2.example.org;
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[0931098] | 336 |
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[697cb83f] | 337 | default-lease-time 600;
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| 338 | max-lease-time 7200;
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[6ad98e12] | 339 |
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[697cb83f] | 340 | # This is a very basic subnet declaration.
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| 341 | subnet 10.254.239.0 netmask 255.255.255.224 {
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| 342 | range 10.254.239.10 10.254.239.20;
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| 343 | option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
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| 344 | }
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[0931098] | 345 |
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[697cb83f] | 346 | # End /etc/dhcp/dhcpd.conf</literal>
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[6ad98e12] | 347 | EOF</userinput></screen>
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| 348 |
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[697cb83f] | 349 | <para>
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| 350 | Adjust the file to suit your needs. See
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| 351 | <command>man 5 dhcpd.conf</command> for additional options.
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| 352 | </para>
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| 353 |
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| 354 | <para>
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| 355 | Now create the <filename class="directory">/var/lib/dhcpd</filename>
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| 356 | directory which will contain DHCP Server leases by running the following
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| 357 | command as the <systemitem class="username">root</systemitem> user:
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| 358 | </para>
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| 359 |
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| 360 | <screen role="root"><userinput>install -v -dm 755 /var/lib/dhcpd</userinput></screen>
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| 361 |
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| 362 | <para>
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| 363 | If you want to start the DHCP Server at boot, install
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| 364 | the <filename>/etc/rc.d/init.d/dhcpd</filename>
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| 365 | init script included in the <xref linkend="bootscripts"/>
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| 366 | package:
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| 367 | </para>
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| 368 |
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| 369 | <screen role="root"><userinput>make install-dhcpd</userinput></screen>
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| 370 |
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| 371 | <indexterm zone="dhcp dhcpd-config">
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| 372 | <primary sortas="f-dhcpd">dhcpd</primary>
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| 373 | </indexterm>
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| 374 |
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| 375 | <para>
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| 376 | You will need to edit the
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| 377 | <filename>/etc/sysconfig/dhcpd</filename> in order
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| 378 | to set the interface on which <command>dhcpd</command>
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| 379 | will serve the DHCP requests.
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| 380 | </para>
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[6ad98e12] | 381 |
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| 382 | </sect3>
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| 383 |
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| 384 | </sect2>
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| 385 |
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| 386 | <sect2 role="content">
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| 387 | <title>Contents</title>
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| 388 |
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| 389 | <segmentedlist>
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| 390 | <segtitle>Installed Programs</segtitle>
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| 391 | <segtitle>Installed Libraries</segtitle>
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| 392 | <segtitle>Installed Directories</segtitle>
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| 393 |
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| 394 | <seglistitem>
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[697cb83f] | 395 | <seg>
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| 396 | dhclient, dhclient-script, dhcpd, dhcrelay and omshell
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| 397 | </seg>
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| 398 | <seg>
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| 399 | libdhcpctl.a, libdst.a and libomapi.a
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| 400 | </seg>
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| 401 | <seg>
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| 402 | /usr/include/dhcpctl,
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| 403 | /usr/include/isc-dhcp,
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| 404 | /usr/include/omapip,
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| 405 | /var/lib/dhclient and
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| 406 | /var/lib/dhcpd
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| 407 | </seg>
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[6ad98e12] | 408 | </seglistitem>
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| 409 | </segmentedlist>
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| 410 |
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| 411 | <variablelist>
|
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| 412 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 413 | <?dbfo list-presentation="list"?>
|
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| 414 | <?dbhtml list-presentation="table"?>
|
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| 415 |
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| 416 | <varlistentry id="dhclient">
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| 417 | <term><command>dhclient</command></term>
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| 418 | <listitem>
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[697cb83f] | 419 | <para>
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| 420 | is the implementation of the DHCP client.
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| 421 | </para>
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[6ad98e12] | 422 | <indexterm zone="dhcp dhclient">
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| 423 | <primary sortas="b-dhclient">dhclient</primary>
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| 424 | </indexterm>
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| 425 | </listitem>
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| 426 | </varlistentry>
|
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| 427 |
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[fa3e12e1] | 428 | <varlistentry id="dhclient-script">
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| 429 | <term><command>dhclient-script</command></term>
|
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| 430 | <listitem>
|
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[697cb83f] | 431 | <para>
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| 432 | is used by dhclient to (re)configure interfaces. It can make
|
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| 433 | extra changes by invoking custom dhclient-{entry,exit}-hooks.
|
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| 434 | </para>
|
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[fa3e12e1] | 435 | <indexterm zone="dhcp dhclient-script">
|
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| 436 | <primary sortas="b-dhclient-script">dhclient-script</primary>
|
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| 437 | </indexterm>
|
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| 438 | </listitem>
|
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| 439 | </varlistentry>
|
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| 440 |
|
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[6ad98e12] | 441 | <varlistentry id="dhcpd">
|
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| 442 | <term><command>dhcpd</command></term>
|
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| 443 | <listitem>
|
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[697cb83f] | 444 | <para>
|
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| 445 | implements Dynamic Host Configuration Protocol (DHCP) and
|
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| 446 | Internet Bootstrap Protocol (BOOTP) requests for network
|
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| 447 | addresses.
|
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| 448 | </para>
|
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[6ad98e12] | 449 | <indexterm zone="dhcp dhcpd">
|
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| 450 | <primary sortas="b-dhcpd">dhcpd</primary>
|
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| 451 | </indexterm>
|
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| 452 | </listitem>
|
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| 453 | </varlistentry>
|
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| 454 |
|
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| 455 | <varlistentry id="dhcrelay">
|
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| 456 | <term><command>dhcrelay</command></term>
|
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| 457 | <listitem>
|
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[697cb83f] | 458 | <para>
|
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| 459 | provides a means to accept DHCP and BOOTP requests on a subnet
|
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| 460 | without a DHCP server and relay them to a DHCP server on another
|
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| 461 | subnet.
|
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| 462 | </para>
|
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[6ad98e12] | 463 | <indexterm zone="dhcp dhcrelay">
|
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| 464 | <primary sortas="b-dhcrelay">dhcrelay</primary>
|
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| 465 | </indexterm>
|
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| 466 | </listitem>
|
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| 467 | </varlistentry>
|
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| 468 |
|
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| 469 | <varlistentry id="omshell">
|
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| 470 | <term><command>omshell</command></term>
|
---|
| 471 | <listitem>
|
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[697cb83f] | 472 | <para>
|
---|
| 473 | provides an interactive way to connect to, query and
|
---|
| 474 | possibly change the ISC DHCP Server's state via OMAPI, the
|
---|
| 475 | Object Management API.
|
---|
| 476 | </para>
|
---|
[6ad98e12] | 477 | <indexterm zone="dhcp omshell">
|
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| 478 | <primary sortas="b-omshell">omshell</primary>
|
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| 479 | </indexterm>
|
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| 480 | </listitem>
|
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| 481 | </varlistentry>
|
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| 482 |
|
---|
| 483 | </variablelist>
|
---|
| 484 |
|
---|
| 485 | </sect2>
|
---|
[04a6794] | 486 |
|
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[f45b1953] | 487 | </sect1>
|
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