| 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 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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| 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 unbound-download-http "https://nlnetlabs.nl/downloads/unbound/unbound-&unbound-version;.tar.gz">
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| 8 | <!ENTITY unbound-download-ftp " ">
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| 9 | <!ENTITY unbound-md5sum "bb96df2dc579c11ada537dbc52781abc">
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| 10 | <!ENTITY unbound-size "6.0 MB">
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| 11 | <!ENTITY unbound-buildsize "141 MB (with docs; add 10 MB for tests)">
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| 12 | <!ENTITY unbound-time "0.5 SBU (Using parallelism=4; with docs; add 0.4 SBU for tests)">
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| 13 | ]>
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| 14 |
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| 15 | <sect1 id="unbound" xreflabel="Unbound-&unbound-version;">
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| 16 | <?dbhtml filename="unbound.html"?>
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| 17 |
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| 18 |
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| 19 | <title>Unbound-&unbound-version;</title>
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| 20 |
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| 21 | <indexterm zone="unbound">
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| 22 | <primary sortas="a-Unbound">Unbound</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to Unbound</title>
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| 27 |
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| 28 | <para>
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| 29 | <application>Unbound</application> is a validating, recursive, and caching
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| 30 | DNS resolver. It is designed as a set of modular components that
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| 31 | incorporate modern features, such as enhanced security (DNSSEC)
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| 32 | validation, Internet Protocol Version 6 (IPv6), and a client resolver
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| 33 | library API as an integral part of the architecture.
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| 34 | </para>
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| 35 |
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| 36 | &lfs112_checked;
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| 37 |
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| 38 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 39 | <itemizedlist spacing="compact">
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| 40 | <listitem>
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| 41 | <para>
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| 42 | Download (HTTP): <ulink url="&unbound-download-http;"/>
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| 43 | </para>
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| 44 | </listitem>
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| 45 | <listitem>
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| 46 | <para>
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| 47 | Download (FTP): <ulink url="&unbound-download-ftp;"/>
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| 48 | </para>
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| 49 | </listitem>
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| 50 | <listitem>
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| 51 | <para>
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| 52 | Download MD5 sum: &unbound-md5sum;
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| 53 | </para>
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| 54 | </listitem>
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| 55 | <listitem>
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| 56 | <para>
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| 57 | Download size: &unbound-size;
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| 58 | </para>
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| 59 | </listitem>
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| 60 | <listitem>
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| 61 | <para>
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| 62 | Estimated disk space required: &unbound-buildsize;
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| 63 | </para>
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| 64 | </listitem>
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| 65 | <listitem>
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| 66 | <para>
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| 67 | Estimated build time: &unbound-time;
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| 68 | </para>
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| 69 | </listitem>
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| 70 | </itemizedlist>
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| 71 |
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| 72 | <bridgehead renderas="sect3">Unbound Dependencies</bridgehead>
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| 73 | <!--
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| 74 | <bridgehead renderas="sect4">Required</bridgehead>
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| 75 | <para role="required">
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| 76 | <xref linkend="openssl"/>
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| 77 | broken?
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| 78 | or <xref linkend="nss"/>
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| 79 | </para>
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| 80 | -->
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| 81 |
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| 82 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 83 | <para role="optional">
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| 84 | <xref linkend="libevent"/>,
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| 85 | <xref linkend="nettle"/>,
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| 86 | <xref linkend="python2"/>,
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| 87 | <xref linkend="sphinx"/> (for Python bindings documentation),
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| 88 | <xref linkend="swig"/> (for Python bindings),
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| 89 | <xref linkend="doxygen"/> (for html documentation), and
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| 90 | <ulink url="https://dnstap.info/">dnstap</ulink>
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| 91 | </para>
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| 92 |
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| 93 | <para condition="html" role="usernotes">User Notes:
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| 94 | <ulink url="&blfs-wiki;/unbound"/>
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| 95 | </para>
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| 96 | </sect2>
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| 97 |
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| 98 | <sect2 role="installation">
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| 99 | <title>Installation of Unbound</title>
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| 100 |
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| 101 | <para>
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| 102 | There should be a dedicated user and group to take control of the
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| 103 | <command>unbound</command> daemon after it is started. Issue the following
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| 104 | commands as the <systemitem class="username">root</systemitem> user:
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| 105 | </para>
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| 106 |
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| 107 | <screen role="root"><userinput>groupadd -g 88 unbound &&
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| 108 | useradd -c "Unbound DNS Resolver" -d /var/lib/unbound -u 88 \
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| 109 | -g unbound -s /bin/false unbound</userinput></screen>
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| 110 |
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| 111 | <para>
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| 112 | Install <application>Unbound</application> by running the following
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| 113 | commands:
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| 114 | </para>
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| 115 |
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| 116 | <screen><userinput>./configure --prefix=/usr \
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| 117 | --sysconfdir=/etc \
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| 118 | --disable-static \
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| 119 | --with-pidfile=/run/unbound.pid &&
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| 120 | make</userinput></screen>
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| 121 |
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| 122 | <para>
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| 123 | If you have <xref linkend="doxygen"/> package installed and want to build
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| 124 | html documentation, run the following command:
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| 125 | </para>
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| 126 |
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| 127 | <screen remap="doc"><userinput>make doc</userinput></screen>
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| 128 |
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| 129 | <para>
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| 130 | To test the results, issue <command>make check</command>.
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| 131 | </para>
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| 132 |
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| 133 | <para>
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| 134 | Now, as the <systemitem class="username">root</systemitem> user:
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| 135 | </para>
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| 136 |
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| 137 | <screen role="root"><userinput>make install &&
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| 138 | mv -v /usr/sbin/unbound-host /usr/bin/</userinput></screen>
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| 139 |
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| 140 | <para>
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| 141 | If you built the documentation, install it by running the following
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| 142 | commands as the <systemitem class="username">root</systemitem> user:
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| 143 | </para>
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| 144 |
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| 145 | <screen role="root"
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| 146 | remap="doc"><userinput>install -v -m755 -d /usr/share/doc/unbound-&unbound-version; &&
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| 147 | install -v -m644 doc/html/* /usr/share/doc/unbound-&unbound-version;</userinput></screen>
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| 148 |
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| 149 | </sect2>
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| 150 |
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| 151 | <sect2 role="commands">
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| 152 | <title>Command Explanations</title>
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| 153 |
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| 154 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 155 | href="../../xincludes/static-libraries.xml"/>
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| 156 |
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| 157 | <para>
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| 158 | <option>--with-libevent</option>: This option enables libevent support
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| 159 | allowing use of large outgoing port ranges.
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| 160 | </para>
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| 161 |
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| 162 | <para>
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| 163 | <option>--with-pyunbound</option>: This option enables building of the Python
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| 164 | bindings.
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| 165 | </para>
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| 166 |
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| 167 | </sect2>
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| 168 |
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| 169 | <sect2 role="configuration">
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| 170 | <title>Configuring Unbound</title>
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| 171 |
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| 172 | <sect3 id="unbound-config">
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| 173 | <title>Config Files</title>
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| 174 |
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| 175 | <para>
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| 176 | <filename>/etc/unbound/unbound.conf</filename>
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| 177 | </para>
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| 178 |
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| 179 | <indexterm zone="unbound unbound-config">
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| 180 | <primary sortas="e-etc-unbound-unbound.conf">/etc/unbound/unbound.conf</primary>
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| 181 | </indexterm>
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| 182 |
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| 183 | </sect3>
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| 184 |
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| 185 | <sect3>
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| 186 | <title>Configuration Information</title>
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| 187 |
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| 188 | <para>
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| 189 | In the default configuration, <command>unbound</command> will bind to
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| 190 | localhost (127.0.0.1 IP address) and allow recursive queries only from
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| 191 | localhost clients. If you want to use <command>unbound</command> for
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| 192 | local DNS resolution, run the following command as the
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| 193 | <systemitem class="username">root</systemitem> user:
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| 194 | </para>
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| 195 |
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| 196 | <screen role="root"><userinput>echo "nameserver 127.0.0.1" > /etc/resolv.conf</userinput></screen>
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| 197 |
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| 198 | <para>
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| 199 | If you are using a DHCP client for connecting to a network,
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| 200 | <filename>/etc/resolv.conf</filename> gets overwritten with values
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| 201 | provided by DHCP server. You can override this, for example in <xref
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| 202 | linkend="dhcp"/>, by running the following command as the <systemitem
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| 203 | class="username">root</systemitem> user:
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| 204 | </para>
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| 205 |
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| 206 | <screen role="root"><userinput>sed -i '/request /i\supersede domain-name-servers 127.0.0.1;' \
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| 207 | /etc/dhcp/dhclient.conf</userinput></screen>
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| 208 |
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| 209 | <para>
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| 210 | For advanced configuration see
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| 211 | <filename>/etc/unbound/unbound.conf</filename> file and the
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| 212 | documentation.
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| 213 | </para>
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| 214 |
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| 215 | <para revision="sysv">
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| 216 | When <application>Unbound</application> is installed, some package
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| 217 | builds fail if the file <filename>/etc/unbound/root.key</filename> is
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| 218 | not found. This file is created by running the boot script (install
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| 219 | instructions below). Alternatively, it can be created by running the
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| 220 | following command as the <systemitem class="username">root</systemitem>
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| 221 | user:
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| 222 | </para>
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| 223 |
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| 224 | <para revision="systemd">
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| 225 | When <application>Unbound</application> is installed, some package
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| 226 | builds fail if the file <filename>/etc/unbound/root.key</filename> is
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| 227 | not found. Create this file by running the following command as the
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| 228 | <systemitem class="username">root</systemitem> user:
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| 229 | </para>
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| 230 |
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| 231 | <screen role="nodump"><userinput>unbound-anchor</userinput></screen>
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| 232 |
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| 233 | </sect3>
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| 234 |
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| 235 | <sect3 id="unbound-init">
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| 236 | <title><phrase revision="sysv">Boot Script</phrase>
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| 237 | <phrase revision="systemd">Systemd Unit</phrase></title>
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| 238 |
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| 239 | <para>
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| 240 | If you want the <application>Unbound</application> server to
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| 241 | start automatically when the system is booted, install the
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| 242 | <phrase revision="sysv"><filename>/etc/rc.d/init.d/unbound</filename>
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| 243 | init script</phrase>
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| 244 | <phrase revision="systemd"><filename>unbound.service</filename>
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| 245 | unit</phrase> included
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| 246 | in the <xref linkend="bootscripts" revision="sysv"/>
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| 247 | <xref linkend="systemd-units" revision="systemd"/> package:
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| 248 | </para>
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| 249 |
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| 250 | <indexterm zone="unbound unbound-init">
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| 251 | <primary sortas="f-unbound">unbound</primary>
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| 252 | </indexterm>
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| 253 |
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| 254 | <screen role="root"><userinput>make install-unbound</userinput></screen>
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| 255 |
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| 256 | </sect3>
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| 257 |
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| 258 | </sect2>
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| 259 |
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| 260 | <sect2 role="content">
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| 261 | <title>Contents</title>
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| 262 |
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| 263 | <segmentedlist>
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| 264 | <segtitle>Installed Programs</segtitle>
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| 265 | <segtitle>Installed Library</segtitle>
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| 266 | <segtitle>Installed Directories</segtitle>
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| 267 |
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| 268 | <seglistitem>
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| 269 | <seg>
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| 270 | unbound, unbound-anchor, unbound-checkconf, unbound-control,
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| 271 | unbound-control-setup, and unbound-host
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| 272 | </seg>
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| 273 | <seg>
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| 274 | libunbound.so and (optional)
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| 275 | /usr/lib/python&python2-majorver;/site-packages/_unbound.so
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| 276 | </seg>
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| 277 | <seg>
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| 278 | /etc/unbound and /usr/share/doc/unbound-&unbound-version; (optional)
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| 279 | </seg>
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| 280 | </seglistitem>
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| 281 | </segmentedlist>
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| 282 |
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| 283 | <variablelist>
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| 284 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 285 | <?dbfo list-presentation="list"?>
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| 286 | <?dbhtml list-presentation="table"?>
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| 287 |
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| 288 | <varlistentry id="unbound-prog">
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| 289 | <term><command>unbound</command></term>
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| 290 | <listitem>
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| 291 | <para>
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| 292 | is a DNS resolver daemon
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| 293 | </para>
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| 294 | <indexterm zone="unbound unbound-prog">
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| 295 | <primary sortas="b-unbound">unbound</primary>
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| 296 | </indexterm>
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| 297 | </listitem>
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| 298 | </varlistentry>
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| 299 |
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| 300 | <varlistentry id="unbound-anchor">
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| 301 | <term><command>unbound-anchor</command></term>
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| 302 | <listitem>
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| 303 | <para>
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| 304 | performs setup or update of the root trust anchor for DNSSEC
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| 305 | validation
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| 306 | </para>
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| 307 | <indexterm zone="unbound unbound-anchor">
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| 308 | <primary sortas="b-unbound-anchor">unbound-anchor</primary>
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| 309 | </indexterm>
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| 310 | </listitem>
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| 311 | </varlistentry>
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| 312 |
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| 313 | <varlistentry id="unbound-checkconf">
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| 314 | <term><command>unbound-checkconf</command></term>
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| 315 | <listitem>
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| 316 | <para>
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| 317 | checks the <command>unbound</command> configuration file for syntax
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| 318 | and other errors
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| 319 | </para>
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| 320 | <indexterm zone="unbound unbound-checkconf">
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| 321 | <primary sortas="b-unbound-checkconf">unbound-checkconf</primary>
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| 322 | </indexterm>
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| 323 | </listitem>
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| 324 | </varlistentry>
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| 325 |
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| 326 | <varlistentry id="unbound-control">
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| 327 | <term><command>unbound-control</command></term>
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| 328 | <listitem>
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| 329 | <para>
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| 330 | performs remote administration on the <command>unbound</command> DNS
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| 331 | resolver
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| 332 | </para>
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| 333 | <indexterm zone="unbound unbound-control">
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| 334 | <primary sortas="b-unbound-control">unbound-control</primary>
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| 335 | </indexterm>
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| 336 | </listitem>
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| 337 | </varlistentry>
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| 338 |
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| 339 | <varlistentry id="unbound-control-setup">
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| 340 | <term><command>unbound-control-setup</command></term>
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| 341 | <listitem>
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| 342 | <para>
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| 343 | generates a self-signed certificate and private keys for the server
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| 344 | and client
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| 345 | </para>
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| 346 | <indexterm zone="unbound unbound-control-setup">
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| 347 | <primary sortas="b-unbound-control-setup">unbound-control-setup</primary>
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| 348 | </indexterm>
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| 349 | </listitem>
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| 350 | </varlistentry>
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| 351 |
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| 352 | <varlistentry id="unbound-host">
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| 353 | <term><command>unbound-host</command></term>
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| 354 | <listitem>
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| 355 | <para>
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| 356 | is a DNS lookup utility similar to <command>host</command> from
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| 357 | <xref linkend="bind-utils"/>
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| 358 | </para>
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| 359 | <indexterm zone="unbound unbound-host">
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| 360 | <primary sortas="b-unbound-host">unbound-host</primary>
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| 361 | </indexterm>
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| 362 | </listitem>
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| 363 | </varlistentry>
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| 364 |
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| 365 | <varlistentry id="libunbound">
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| 366 | <term><filename class="libraryfile">libunbound.so</filename></term>
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| 367 | <listitem>
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| 368 | <para>
|
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| 369 | provides the <application>Unbound</application> API functions to
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| 370 | programs
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| 371 | </para>
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| 372 | <indexterm zone="unbound libunbound">
|
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| 373 | <primary sortas="c-libunbound">libunbound.so</primary>
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| 374 | </indexterm>
|
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| 375 | </listitem>
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| 376 | </varlistentry>
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| 377 |
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| 378 | </variablelist>
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| 379 |
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| 380 | </sect2>
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| 381 |
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| 382 | </sect1>
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