source: server/other/bind/bind-config.xml@ e80cc95

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Last change on this file since e80cc95 was e80cc95, checked in by Larry Lawrence <larry@…>, 19 years ago

config files edit

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@865 af4574ff-66df-0310-9fd7-8a98e5e911e0

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1<sect2>
2<title>Configuring BIND</title>
3<para>We will configure BIND to run in a chroot jail as an unprivileged
4user(named). This configuration is more secure in that a DNS
5compromise can only affect a few files in the named user's $HOME
6directory </para>
7
8<para>First we set up some files and directories needed by
9BIND:</para>
10<para><screen><userinput>groupadd -g 200 named &amp;&amp;
11useradd -m -g named -u 200 -s /bin/false named &amp;&amp;
12cd /home/named &amp;&amp;
13mkdir -p dev etc/namedb/slave var/run &amp;&amp;
14mknod /home/named/dev/null c 1 3 &amp;&amp;
15mknod /home/named/dev/random c 1 8 &amp;&amp;
16chmod 666 /home/named/dev/{null,random} &amp;&amp;
17mkdir /home/named/etc/namedb/pz &amp;&amp;
18cp /etc/localtime /home/named/etc</userinput></screen></para>
19
20<sect3><title>Config files</title>
21<para><filename>named.conf</filename>,
22<filename>root.hints</filename>, <filename>127.0.0</filename> and
23<filename>rndc.conf</filename></para>
24
25<para>Create the named.conf file with the following commands:</para>
26<para><screen><userinput>cat &gt; /home/named/etc/named.conf &lt;&lt; "EOF"</userinput>
27 options {
28 directory "/etc/namedb";
29 pid-file "/var/run/named.pid";
30 statistics-file "/var/run/named.stats";
31
32 };
33 controls {
34 inet 127.0.0.1 allow { localhost; } keys { rndc_key; };
35 };
36 key "rndc_key" {
37 algorithm hmac-md5;
38 secret "c3Ryb25nIGVub3VnaCBmb3IgYSBtYW4gYnV0IG1hZGUgZm9yIGEgd29tYW4K";
39 };
40 zone "." {
41 type hint;
42 file "root.hints";
43 };
44 zone "0.0.127.in-addr.arpa" {
45 type master;
46 file "pz/127.0.0";
47 };
48<userinput>EOF</userinput></screen></para>
49<para>Create a zone file with the following contents: </para>
50<para><screen><userinput>cat &gt; /home/named/etc/namedb/pz/127.0.0 &lt;&lt; "EOF"</userinput>
51$TTL 3D
52@ IN SOA ns.local.domain. hostmaster.local.domain. (
53 1 ; Serial
54 8H ; Refresh
55 2H ; Retry
56 4W ; Expire
57 1D) ; Minimum TTL
58 NS ns.local.domain.
591 PTR localhost.
60<userinput>EOF</userinput></screen></para>
61
62<para>Create the root.hints file with the following commands: </para>
63<note><para>Caution must be used to insure no leading spaces in this
64file.</para></note>
65<para><screen><userinput>cat &gt; /home/named/etc/namedb/root.hints &lt;&lt; "EOF"</userinput>
66. 6D IN NS A.ROOT-SERVERS.NET.
67. 6D IN NS B.ROOT-SERVERS.NET.
68. 6D IN NS C.ROOT-SERVERS.NET.
69. 6D IN NS D.ROOT-SERVERS.NET.
70. 6D IN NS E.ROOT-SERVERS.NET.
71. 6D IN NS F.ROOT-SERVERS.NET.
72. 6D IN NS G.ROOT-SERVERS.NET.
73. 6D IN NS H.ROOT-SERVERS.NET.
74. 6D IN NS I.ROOT-SERVERS.NET.
75. 6D IN NS J.ROOT-SERVERS.NET.
76. 6D IN NS K.ROOT-SERVERS.NET.
77. 6D IN NS L.ROOT-SERVERS.NET.
78. 6D IN NS M.ROOT-SERVERS.NET.
79A.ROOT-SERVERS.NET. 6D IN A 198.41.0.4
80B.ROOT-SERVERS.NET. 6D IN A 128.9.0.107
81C.ROOT-SERVERS.NET. 6D IN A 192.33.4.12
82D.ROOT-SERVERS.NET. 6D IN A 128.8.10.90
83E.ROOT-SERVERS.NET. 6D IN A 192.203.230.10
84F.ROOT-SERVERS.NET. 6D IN A 192.5.5.241
85G.ROOT-SERVERS.NET. 6D IN A 192.112.36.4
86H.ROOT-SERVERS.NET. 6D IN A 128.63.2.53
87I.ROOT-SERVERS.NET. 6D IN A 192.36.148.17
88J.ROOT-SERVERS.NET. 6D IN A 192.58.128.30
89K.ROOT-SERVERS.NET. 6D IN A 193.0.14.129
90L.ROOT-SERVERS.NET. 6D IN A 198.32.64.12
91M.ROOT-SERVERS.NET. 6D IN A 202.12.27.33
92<userinput>EOF</userinput></screen></para>
93
94<para>Create the rndc.conf with the following commands:</para>
95<para><screen><userinput>cat &gt; /etc/rndc.conf &lt;&lt; "EOF"</userinput>
96key rndc_key {
97algorithm "hmac-md5";
98 secret
99 "c3Ryb25nIGVub3VnaCBmb3IgYSBtYW4gYnV0IG1hZGUgZm9yIGEgd29tYW4K";
100 };
101options {
102 default-server localhost;
103 default-key rndc_key;
104};
105<userinput>EOF</userinput></screen></para>
106
107<para>Create or modify resolv.conf to use the new name server with the
108following commands: </para>
109<note><para>Replace yourdomain.com with your own valid domain
110name.</para></note>
111
112<para><screen><userinput>cp /etc/resolv.conf /etc/resolv.conf.bak &amp;&amp;
113cat &gt; /etc/resolv.conf &lt;&lt; "EOF"</userinput>
114search yourdomain.com
115nameserver 127.0.0.1
116<userinput>EOF</userinput></screen></para>
117
118<para>Set permissions on the chroot jail with the following
119command:</para>
120<para><screen><userinput>chown -R named.named /home/named</userinput></screen></para>
121
122<para>Create the BIND boot script:</para>
123<para><screen><userinput>cat &gt; /etc/rc.d/init.d/bind &lt;&lt; "EOF"</userinput>
124#!/bin/bash
125# Begin $rc_base/init.d/bind
126# Based on sysklogd script from LFS-3.1 and earlier.
127# Rewritten by Gerard Beekmans - gerard@linuxfromscratch.org
128source /etc/sysconfig/rc
129source $rc_functions
130case "$1" in
131 start)
132 echo "Starting named..."
133 loadproc /usr/sbin/named -u named -t /home/named -c \
134 /etc/named.conf
135 ;;
136 stop)
137 echo "Stopping named..."
138 killproc /usr/sbin/named
139 ;;
140 restart)
141 $0 stop
142 sleep 1
143 $0 start
144 ;;
145 reload)
146 echo "Reloading named..."
147 /usr/sbin/rndc -c /etc/rndc.conf reload
148 ;;
149
150 status)
151 statusproc /usr/sbin/named
152 ;;
153 *)
154 echo "Usage: $0 {start|stop|restart|status}"
155 exit 1
156 ;;
157esac
158# End $rc_base/init.d/bind
159<userinput>EOF</userinput></screen></para>
160
161<para>Add the run level symlinks:</para>
162<para><screen><userinput>chmod 754 /etc/rc.d/init.d/bind &amp;&amp;
163ln -s /etc/rc.d/init.d/bind /etc/rc.d/rc0.d/K49bind &amp;&amp;
164ln -s /etc/rc.d/init.d/bind /etc/rc.d/rc1.d/K49bind &amp;&amp;
165ln -s /etc/rc.d/init.d/bind /etc/rc.d/rc2.d/K49bind &amp;&amp;
166ln -s /etc/rc.d/init.d/bind /etc/rc.d/rc3.d/S22bind &amp;&amp;
167ln -s /etc/rc.d/init.d/bind /etc/rc.d/rc4.d/S22bind &amp;&amp;
168ln -s /etc/rc.d/init.d/bind /etc/rc.d/rc5.d/S22bind &amp;&amp;
169ln -s /etc/rc.d/init.d/bind /etc/rc.d/rc6.d/K49bind</userinput></screen></para>
170
171<para>Now start BIND with the new boot script: </para>
172<para><screen><userinput>/etc/rc.d/init.d/bind start</userinput></screen></para></sect3>
173
174<sect3><title>Testing BIND</title>
175<para>Test out the new BIND 9 installation. First query the local
176host address with dig:</para>
177<para><screen><userinput>dig -x 127.0.0.1</userinput></screen></para>
178<para>Now try an external name lookup, taking note of the speed
179difference in repeated lookups due to the caching. Run the dig
180command twice on the same address:</para>
181<para><screen><userinput>dig beyond.linuxfromscratch.org &amp;&amp;
182dig beyond.linuxfromscratch.org</userinput></screen>
183You can see almost instantaneous results with the named caching
184lookups. Consult bind-&bind-version;/doc/arm/Bv9ARM.html, the BIND
185Administrator Reference Manual for further configuration options.
186</para></sect3>
187</sect2>
188
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