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 bind-download-http "http://gd.tuwien.ac.at/infosys/servers/isc/bind9/&bind-version;/bind-&bind-version;.tar.gz">
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8 | <!ENTITY bind-download-ftp "ftp://ftp.isc.org/isc/bind9/&bind-version;/bind-&bind-version;.tar.gz">
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9 | <!ENTITY bind-size "4.4 MB">
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10 | <!ENTITY bind-buildsize "88 MB">
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11 | <!ENTITY bind-time "0.89 SBU">
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12 |
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13 | ]>
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14 |
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15 | <sect1 id="bind" xreflabel="BIND-&bind-version;">
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16 | <?dbhtml filename="bind.html"?>
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17 | <title><acronym>BIND</acronym>-&bind-version;</title>
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18 |
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19 | <sect2>
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20 | <title>Introduction to <application><acronym>BIND</acronym></application></title>
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21 |
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22 | <para>The <application><acronym>BIND</acronym></application> package
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23 | provides a <acronym>DNS</acronym> server and client utilities. If you
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24 | are only interested in the utilities, refer to the <xref linkend="bind-utils"/>.</para>
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25 |
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26 | <sect3><title>Package information</title>
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27 | <itemizedlist spacing='compact'>
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28 | <listitem><para>Download (HTTP): <ulink url="&bind-download-http;"/></para></listitem>
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29 | <listitem><para>Download (FTP): <ulink url="&bind-download-ftp;"/></para></listitem>
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30 | <listitem><para>Download size: &bind-size;</para></listitem>
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31 | <listitem><para>Estimated Disk space required: &bind-buildsize;</para></listitem>
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32 | <listitem><para>Estimated build time: &bind-time;</para></listitem></itemizedlist>
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33 | </sect3>
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34 |
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35 | <sect3><title><application><acronym>BIND</acronym></application> dependencies</title>
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36 | <sect4><title>Optional</title>
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37 | <para><xref linkend="openssl"/> and <xref linkend="openjade"/>
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38 | </para></sect4>
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39 | </sect3>
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40 |
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41 | </sect2>
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42 |
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43 | <sect2>
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44 | <title>Installation of <application><acronym>BIND</acronym></application></title>
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45 |
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46 | <para>Install <application><acronym>BIND</acronym></application> by
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47 | running the following commands:</para>
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48 |
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49 | <screen><userinput><command>./configure --prefix=/usr --sysconfdir=/etc &&
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50 | make &&
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51 | make install</command></userinput></screen>
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52 |
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53 | </sect2>
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54 |
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55 | <sect2>
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56 | <title>Configuring
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57 | <application><acronym>BIND</acronym></application></title>
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58 |
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59 | <sect3><title>Config files</title>
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60 | <para><filename>named.conf</filename>, <filename>root.hints</filename>,
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61 | <filename>127.0.0</filename>, <filename>rndc.conf</filename></para>
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62 | </sect3>
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63 |
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64 | <sect3><title>Configuration Information</title>
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65 |
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66 | <para>We will configure
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67 | <application><acronym>BIND</acronym></application> to run in a chroot
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68 | jail as an unprivileged user (named). This configuration is more secure
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69 | in that a <acronym>DNS</acronym> compromise can only affect a few files
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70 | in the named user's <envar>HOME</envar> directory.</para>
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71 |
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72 | <para>First we create the unprivileged user and group named:</para>
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73 |
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74 | <screen><userinput><command>groupadd named &&
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75 | useradd -m -g named -s /bin/false named</command></userinput></screen>
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76 |
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77 | <para>Then we set up some files, directories and devices needed by
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78 | <application><acronym>BIND</acronym></application>:</para>
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79 |
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80 | <screen><userinput><command>cd /home/named &&
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81 | mkdir -p dev etc/namedb/slave var/run &&
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82 | mknod /home/named/dev/null c 1 3 &&
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83 | mknod /home/named/dev/random c 1 8 &&
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84 | chmod 666 /home/named/dev/{null,random} &&
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85 | mkdir /home/named/etc/namedb/pz &&
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86 | cp /etc/localtime /home/named/etc</command></userinput></screen>
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87 |
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88 | <para>Create the <filename>named.conf</filename> file from which named
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89 | will read the location of zone files, root name servers and secure
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90 | <acronym>DNS</acronym> keys:</para>
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91 |
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92 | <screen><userinput><command>cat > /home/named/etc/named.conf << "EOF"</command>
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93 | options {
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94 | directory "/etc/namedb";
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95 | pid-file "/var/run/named.pid";
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96 | statistics-file "/var/run/named.stats";
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97 |
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98 | };
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99 | controls {
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100 | inet 127.0.0.1 allow { localhost; } keys { rndc_key; };
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101 | };
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102 | key "rndc_key" {
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103 | algorithm hmac-md5;
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104 | secret "<replaceable>[c3Ryb25nIGVub3VnaCBmb3IgYSBtYW4gYnV0IG1hZGUgZm9yIGEgd29tYW4K]</replaceable>";
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105 | };
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106 | zone "." {
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107 | type hint;
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108 | file "root.hints";
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109 | };
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110 | zone "0.0.127.in-addr.arpa" {
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111 | type master;
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112 | file "pz/127.0.0";
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113 | };
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114 | <command>EOF</command></userinput></screen>
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115 |
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116 | <para>Create a zone file with the following contents:</para>
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117 |
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118 | <screen><userinput><command>cat > /home/named/etc/namedb/pz/127.0.0 << "EOF"</command>
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119 | $TTL 3D
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120 | @ IN SOA ns.local.domain. hostmaster.local.domain. (
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121 | 1 ; Serial
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122 | 8H ; Refresh
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123 | 2H ; Retry
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124 | 4W ; Expire
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125 | 1D) ; Minimum TTL
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126 | NS ns.local.domain.
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127 | 1 PTR localhost.
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128 | <command>EOF</command></userinput></screen>
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129 |
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130 | <para>Create the <filename>root.hints</filename> file with the following
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131 | commands:</para>
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132 |
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133 | <note><para>Caution must be used to ensure no leading spaces in this
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134 | file.</para></note>
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135 |
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136 | <screen><userinput><command>cat > /home/named/etc/namedb/root.hints << "EOF"</command>
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137 | . 6D IN NS A.ROOT-SERVERS.NET.
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138 | . 6D IN NS B.ROOT-SERVERS.NET.
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139 | . 6D IN NS C.ROOT-SERVERS.NET.
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140 | . 6D IN NS D.ROOT-SERVERS.NET.
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141 | . 6D IN NS E.ROOT-SERVERS.NET.
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142 | . 6D IN NS F.ROOT-SERVERS.NET.
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143 | . 6D IN NS G.ROOT-SERVERS.NET.
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144 | . 6D IN NS H.ROOT-SERVERS.NET.
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145 | . 6D IN NS I.ROOT-SERVERS.NET.
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146 | . 6D IN NS J.ROOT-SERVERS.NET.
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147 | . 6D IN NS K.ROOT-SERVERS.NET.
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148 | . 6D IN NS L.ROOT-SERVERS.NET.
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149 | . 6D IN NS M.ROOT-SERVERS.NET.
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150 | A.ROOT-SERVERS.NET. 6D IN A 198.41.0.4
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151 | B.ROOT-SERVERS.NET. 6D IN A 128.9.0.107
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152 | C.ROOT-SERVERS.NET. 6D IN A 192.33.4.12
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153 | D.ROOT-SERVERS.NET. 6D IN A 128.8.10.90
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154 | E.ROOT-SERVERS.NET. 6D IN A 192.203.230.10
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155 | F.ROOT-SERVERS.NET. 6D IN A 192.5.5.241
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156 | G.ROOT-SERVERS.NET. 6D IN A 192.112.36.4
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157 | H.ROOT-SERVERS.NET. 6D IN A 128.63.2.53
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158 | I.ROOT-SERVERS.NET. 6D IN A 192.36.148.17
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159 | J.ROOT-SERVERS.NET. 6D IN A 192.58.128.30
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160 | K.ROOT-SERVERS.NET. 6D IN A 193.0.14.129
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161 | L.ROOT-SERVERS.NET. 6D IN A 198.32.64.12
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162 | M.ROOT-SERVERS.NET. 6D IN A 202.12.27.33
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163 | <command>EOF</command></userinput></screen>
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164 |
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165 | <para>The <filename>root.hints</filename> file is a list of root name
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166 | servers. This file must be updated periodically with the
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167 | <command>dig</command> utility.
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168 | Consult the <ulink url="http://www.bind9.net/Bv9ARM.html"><application><acronym>BIND</acronym></application> 9 Administrator Reference Manual</ulink> for
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169 | details.</para>
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170 |
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171 | <para>Create the <filename>rndc.conf</filename> with the following commands:</para>
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172 |
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173 | <screen><userinput><command>cat > /etc/rndc.conf << "EOF"</command>
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174 | key rndc_key {
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175 | algorithm "hmac-md5";
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176 | secret
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177 | "<replaceable>[c3Ryb25nIGVub3VnaCBmb3IgYSBtYW4gYnV0IG1hZGUgZm9yIGEgd29tYW4K]</replaceable>";
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178 | };
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179 | options {
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180 | default-server localhost;
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181 | default-key rndc_key;
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182 | };
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183 | <command>EOF</command></userinput></screen>
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184 |
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185 | <para>The <filename>rndc.conf</filename> file contains information for
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186 | controlling named operations with the <command>rndc</command>
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187 | utility.</para>
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188 |
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189 | <para>Create or modify <filename>resolv.conf</filename> to use the new
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190 | name server with the following commands:</para>
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191 |
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192 | <note><para>Replace yourdomain.com with your own valid domain
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193 | name.</para></note>
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194 |
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195 | <screen><userinput><command>cp /etc/resolv.conf /etc/resolv.conf.bak &&
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196 | cat > /etc/resolv.conf << "EOF"</command>
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197 | search <replaceable>[yourdomain.com]</replaceable>
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198 | nameserver 127.0.0.1
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199 | <command>EOF</command></userinput></screen>
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200 |
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201 | <para>Set permissions on the chroot jail with the following
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202 | command:</para>
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203 |
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204 | <screen><userinput><command>chown -R named.named /home/named</command></userinput></screen>
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205 |
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206 | <para>To start the DNS server at boot, install the <filename>/etc/rc.d/init.d/bind</filename>
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207 | init script included in the <xref linkend="intro-important-bootscripts"/> package.</para>
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208 |
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209 | <screen><userinput><command>make install-bind</command></userinput></screen>
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210 |
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211 | <para>Now start <application><acronym>BIND</acronym></application> with
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212 | the new boot script:</para>
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213 |
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214 | <screen><userinput><command>/etc/rc.d/init.d/bind start</command></userinput></screen>
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215 |
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216 | </sect3>
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217 |
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218 | <sect3><title>Testing <application><acronym>BIND</acronym></application></title>
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219 |
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220 | <para>Test out the new
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221 | <application><acronym>BIND</acronym></application> 9 installation. First
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222 | query the local host address with <command>dig</command>:</para>
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223 |
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224 | <screen><userinput><command>dig -x 127.0.0.1</command></userinput></screen>
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225 |
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226 | <para>Now try an external name lookup, taking note of the speed
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227 | difference in repeated lookups due to the caching. Run the dig command
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228 | twice on the same address:</para>
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229 |
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230 | <para><screen><userinput><command>dig beyond.linuxfromscratch.org &&
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231 | dig beyond.linuxfromscratch.org</command></userinput></screen>
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232 | You can see almost instantaneous results with the named caching lookups.
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233 | Consult <filename>bind-&bind-version;/doc/arm/Bv9ARM.html</filename>,
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234 | the <application><acronym>BIND</acronym></application> Administrator
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235 | Reference Manual for further configuration options.</para>
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236 |
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237 | </sect3>
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238 |
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239 | </sect2>
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240 |
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241 | <sect2>
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242 | <title>Contents</title>
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243 |
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244 | <para>The <application><acronym>BIND</acronym></application> package contains
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245 | <command>dig</command>,
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246 | <command>host</command>,
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247 | <command>isc-config.sh</command>,
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248 | <command>nslookup</command>,
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249 | <command>rndc</command>,
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250 | <command>rndc-confgen</command>,
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251 | <command>named-checkconf</command>,
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252 | <command>named-checkzone</command>,
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253 | <command>lwresd</command>,
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254 | <command>named</command>,
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255 | <command>dnssec-signzone</command>,
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256 | <command>dnssec-signkey</command>,
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257 | <command>dnssec-keygen</command>,
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258 | <command>dnssec-makekeyset</command> and
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259 | <command>nsupdate</command>.</para>
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260 | </sect2>
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261 |
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262 | <sect2><title>Description</title>
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263 |
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264 | <sect3><title>dig</title>
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265 | <para><command>dig</command> interrogates <acronym>DNS</acronym>
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266 | servers.</para></sect3>
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267 |
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268 | <sect3><title>host</title>
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269 | <para><command>host</command> is a utility for <acronym>DNS</acronym>
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270 | lookups.</para></sect3>
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271 |
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272 | <sect3><title>nslookup</title>
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273 | <para><command>nslookup</command> is a program used to query Internet
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274 | domain nameservers.</para></sect3>
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275 |
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276 | <sect3><title>rndc</title>
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277 | <para><command>rndc</command> controls the operation of
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278 | <application><acronym>BIND</acronym></application>.</para></sect3>
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279 |
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280 | <sect3><title>rndc-confgen</title>
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281 | <para><command>rndc-confgen</command> generates
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282 | <filename>rndc.conf</filename> files.</para></sect3>
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283 |
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284 | <sect3><title>named-checkconf</title>
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285 | <para><command>named-checkconf</command> checks the syntax of
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286 | <filename>named.conf</filename> files.</para></sect3>
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287 |
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288 | <sect3><title>named-checkzone</title>
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289 | <para><command>named-checkzone</command> checks zone file
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290 | validity.</para></sect3>
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291 |
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292 | <sect3><title>lwresd</title>
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293 | <para><command>lwresd</command> is a caching-only name server for local
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294 | process use.</para></sect3>
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295 |
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296 | <sect3><title>named</title>
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297 | <para><command>named</command> is the name server daemon.</para></sect3>
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298 |
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299 | <sect3><title>dnssec-signzone</title>
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300 | <para><command>dnssec-signzone</command> generates signed versions of
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301 | zone files.</para></sect3>
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302 |
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303 | <sect3><title>dnssec-signkey</title>
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304 | <para><command>dnssec-signkey</command> signs zone file key
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305 | sets.</para></sect3>
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306 |
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307 | <sect3><title>dnssec-keygen</title>
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308 | <para><command>dnssec-keygen</command> is a key generator for secure
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309 | <acronym>DNS</acronym>.</para></sect3>
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310 |
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311 | <sect3><title>dnssec-makekeyset</title>
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312 | <para><command>dnssec-makekeyset</command> generates a key set from one
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313 | or more keys created by dnssec-keygen.</para></sect3>
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314 |
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315 | <sect3><title>nsupdate</title>
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316 | <para><command>nsupdate</command> is used to submit
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317 | <acronym>DNS</acronym> update requests.</para></sect3>
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318 |
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319 | </sect2>
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320 |
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321 | </sect1>
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322 |
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