source: postlfs/security/iptables-systemd.xml@ 4a45bd4

7.6-blfs 7.6-systemd kde5-14269 kde5-14686 systemd-13485
Last change on this file since 4a45bd4 was 4a45bd4, checked in by Krejzi <krejzi@…>, 10 years ago

Convert iptables, firewall section and haveged to systemd. Remove network service files from systemd-units.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/branches/systemd@13509 af4574ff-66df-0310-9fd7-8a98e5e911e0
  • Property mode set to 100644
File size: 10.2 KB
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY iptables-download-http "http://www.netfilter.org/projects/iptables/files/iptables-&iptables-version;.tar.bz2">
8 <!ENTITY iptables-download-ftp "ftp://ftp.netfilter.org/pub/iptables/iptables-&iptables-version;.tar.bz2">
9 <!ENTITY iptables-md5sum "536d048c8e8eeebcd9757d0863ebb0c0">
10 <!ENTITY iptables-size "536 KB">
11 <!ENTITY iptables-buildsize "15 MB">
12 <!ENTITY iptables-time "0.2 SBU">
13]>
14
15<sect1 id="iptables" xreflabel="Iptables-&iptables-version;">
16 <?dbhtml filename="iptables.html"?>
17
18 <sect1info>
19 <othername>$LastChangedBy$</othername>
20 <date>$Date$</date>
21 </sect1info>
22
23 <title>Iptables-&iptables-version;</title>
24
25 <indexterm zone="iptables">
26 <primary sortas="a-Iptables">Iptables</primary>
27 </indexterm>
28
29 <sect2 role="package">
30 <title>Introduction to Iptables</title>
31
32 <para>
33 The next part of this chapter deals with firewalls. The principal
34 firewall tool for Linux is <application>Iptables</application>. You will
35 need to install <application>Iptables</application> if you intend on using
36 any form of a firewall.
37 </para>
38
39 &lfs75_checked;
40
41 <bridgehead renderas="sect3">Package Information</bridgehead>
42 <itemizedlist spacing="compact">
43 <listitem>
44 <para>
45 Download (HTTP): <ulink url="&iptables-download-http;"/>
46 </para>
47 </listitem>
48 <listitem>
49 <para>
50 Download (FTP): <ulink url="&iptables-download-ftp;"/>
51 </para>
52 </listitem>
53 <listitem>
54 <para>
55 Download MD5 sum: &iptables-md5sum;
56 </para>
57 </listitem>
58 <listitem>
59 <para>
60 Download size: &iptables-size;
61 </para>
62 </listitem>
63 <listitem>
64 <para>
65 Estimated disk space required: &iptables-buildsize;
66 </para>
67 </listitem>
68 <listitem>
69 <para>
70 Estimated build time: &iptables-time;
71 </para>
72 </listitem>
73 </itemizedlist>
74
75 <para condition="html" role="usernotes">User Notes:
76 <ulink url="&blfs-wiki;/iptables"/>
77 </para>
78 </sect2>
79
80 <sect2 role="kernel" id="iptables-kernel">
81 <title>Kernel Configuration</title>
82
83 <para>
84 A firewall in Linux is accomplished through a portion of the
85 kernel called netfilter. The interface to netfilter is
86 <application>Iptables</application>. To use it, the appropriate
87 kernel configuration parameters are found in Networking Support &rArr;
88 Networking Options &rArr; Network Packet Filtering Framework.
89 </para>
90
91 <indexterm zone="iptables iptables-kernel">
92 <primary sortas="d-iptables">Iptables</primary>
93 </indexterm>
94
95 </sect2>
96
97 <sect2 role="installation">
98 <title>Installation of Iptables</title>
99
100 <note>
101 <para>
102 The installation below does not include building some specialized
103 extension libraries which require the raw headers in the
104 <application>Linux</application> source code. If you wish to build the
105 additional extensions (if you aren't sure, then you probably don't), you
106 can look at the <filename>INSTALL</filename> file to see an example of
107 how to change the <parameter>KERNEL_DIR=</parameter> parameter to point
108 at the <application>Linux</application> source code. Note that if you
109 upgrade the kernel version, you may also need to recompile
110 <application>Iptables</application> and that the BLFS team has not tested
111 using the raw kernel headers.
112 </para>
113
114 <para>
115 For some non-x86 architectures, the raw kernel headers may be
116 required. In that case, modify the <parameter>KERNEL_DIR=</parameter>
117 parameter to point at the <application>Linux</application> source
118 code.
119 </para>
120 </note>
121
122 <para>
123 Install <application>Iptables</application> by running the following
124 commands:
125 </para>
126
127<screen><userinput>./configure --prefix=/usr \
128 --sbindir=/sbin \
129 --with-xtlibdir=/lib/xtables \
130 --enable-libipq &amp;&amp;
131make</userinput></screen>
132
133 <para>This package does not come with a test suite.</para>
134
135 <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
136
137<screen role="root"><userinput>make install &amp;&amp;
138ln -sfv ../../sbin/xtables-multi /usr/bin/iptables-xml &amp;&amp;
139for file in ip4tc ip6tc ipq iptc xtables
140do
141 mv -v /usr/lib/lib${file}.so.* /lib &amp;&amp;
142 ln -sfv ../../lib/$(readlink /usr/lib/lib${file}.so) /usr/lib/lib${file}.so
143done</userinput></screen>
144
145 </sect2>
146
147 <sect2 role="commands">
148 <title>Command Explanations</title>
149
150 <para>
151 <parameter>--with-xtlibdir=/lib/xtables</parameter>: Ensure all
152 <application>Iptables</application> modules are installed in the
153 <filename class="directory">/lib/xtables</filename> directory.
154 </para>
155
156 <para>
157 <option>--enable-libipq</option>: This switch enables building
158 of <filename class="libraryfile">libipq.so</filename> which
159 can be used by some packages outside of BLFS.
160 </para>
161
162 <para>
163 <option>--enable-nfsynproxy</option>: This switch enables installation
164 of <application>nfsynproxy</application> SYNPROXY configuration tool.
165 </para>
166
167 <para>
168 <command>ln -sfv ../../sbin/xtables-multi /usr/bin/iptables-xml</command>:
169 Ensure the symbolic link for <command>iptables-xml</command> is relative.
170 </para>
171
172 </sect2>
173
174 <sect2 role="configuration">
175 <title>Configuring Iptables</title>
176
177 <para>
178 Introductory instructions for configuring your firewall are
179 presented in the next section: <xref linkend="fw-firewall"/>
180 </para>
181
182 <sect3 id="iptables-init">
183 <title>Systemd Units</title>
184
185 <para>
186 To set up the <application>Iptables</application> firewall at boot,
187 install the systemd unit from the <xref linkend="bootscripts"/>
188 package by running the following command as the
189 <systemitem class="username">root</systemitem> user:
190 </para>
191
192 <indexterm zone="iptables iptables-init">
193 <primary sortas="f-iptables">iptables</primary>
194 </indexterm>
195
196<screen role="root"><userinput>make install-iptables</userinput></screen>
197
198 </sect3>
199
200 </sect2>
201
202 <sect2 role="content">
203 <title>Contents</title>
204
205 <segmentedlist>
206 <segtitle>Installed Programs</segtitle>
207 <segtitle>Installed Libraries</segtitle>
208 <segtitle>Installed Directories</segtitle>
209
210 <seglistitem>
211 <seg>
212 ip6tables, ip6tables-restore, ip6tables-save, iptables, iptables-restore,
213 iptables-save, iptables-xml, and xtables-multi
214 </seg>
215 <seg>
216 libip4tc.so, libip6tc.so, libipq.so, libiptc.so, and libxtables.so
217 </seg>
218 <seg>
219 /lib/xtables and /usr/include/libiptc
220 </seg>
221 </seglistitem>
222 </segmentedlist>
223
224 <variablelist>
225 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
226 <?dbfo list-presentation="list"?>
227 <?dbhtml list-presentation="table"?>
228
229 <varlistentry id="iptables-prog">
230 <term><command>iptables</command></term>
231 <listitem>
232 <para>
233 is used to set up, maintain, and inspect the tables of
234 IP packet filter rules in the Linux kernel.
235 </para>
236 <indexterm zone="iptables iptables-prog">
237 <primary sortas="b-iptables">iptables</primary>
238 </indexterm>
239 </listitem>
240 </varlistentry>
241
242 <varlistentry id="iptables-restore">
243 <term><command>iptables-restore</command></term>
244 <listitem>
245 <para>
246 is used to restore IP Tables from data specified on
247 STDIN. Use I/O redirection provided by your
248 shell to read from a file.
249 </para>
250 <indexterm zone="iptables iptables-restore">
251 <primary sortas="b-iptables-restore">iptables-restore</primary>
252 </indexterm>
253 </listitem>
254 </varlistentry>
255
256 <varlistentry id="iptables-save">
257 <term><command>iptables-save</command></term>
258 <listitem>
259 <para>
260 is used to dump the contents of an IP Table in easily
261 parseable format to STDOUT. Use I/O-redirection
262 provided by your shell to write to a file.
263 </para>
264 <indexterm zone="iptables iptables-save">
265 <primary sortas="b-iptables-save">iptables-save</primary>
266 </indexterm>
267 </listitem>
268 </varlistentry>
269
270 <varlistentry id="iptables-xml">
271 <term><command>iptables-xml</command></term>
272 <listitem>
273 <para>
274 is used to convert the output of
275 <command>iptables-save</command> to an XML format. Using the
276 <filename>iptables.xslt</filename> stylesheet converts the XML
277 back to the format of <command>iptables-restore</command>.
278 </para>
279 <indexterm zone="iptables iptables-xml">
280 <primary sortas="b-iptables-xml">iptables-xml</primary>
281 </indexterm>
282 </listitem>
283 </varlistentry>
284
285 <varlistentry id="ip6tables">
286 <term><command>ip6tables*</command></term>
287 <listitem>
288 <para>
289 are a set of commands for IPV6 that parallel the iptables
290 commands above.
291 </para>
292 <indexterm zone="iptables ip6tables">
293 <primary sortas="b-ip6tables">ip6tables</primary>
294 </indexterm>
295 </listitem>
296 </varlistentry>
297
298 <varlistentry id="nfsynproxy">
299 <term><command>nfsynproxy</command></term>
300 <listitem>
301 <para>
302 (optional) configuration tool. SYNPROXY target makes handling of
303 large SYN floods possible without the large performance penalties
304 imposed by the connection tracking in such cases.
305 </para>
306 <indexterm zone="iptables nfsynproxy">
307 <primary sortas="b-nfsynproxy">nfsynproxy</primary>
308 </indexterm>
309 </listitem>
310 </varlistentry>
311
312 </variablelist>
313
314 </sect2>
315
316</sect1>
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