| [b4b71892] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| [6732c094] | 2 | <!DOCTYPE chapter 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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| [b4b71892] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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| [276015d2] | 8 | <!--
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| 9 | $LastChangedBy$
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| 10 | $Date$
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| 11 | -->
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| 12 |
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| [f45b1953] | 13 | <chapter id="postlfs-security">
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| [2dbd7a5f] | 14 | <?dbhtml filename="security.html"?>
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| 15 |
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| 16 | <title>Security</title>
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| 17 |
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| 18 | <para>Security takes many forms in a computing environment. This chapter
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| 19 | gives examples of three different types of security: access, prevention
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| 20 | and detection.</para>
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| 21 |
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| 22 | <para>Access for users is usually handled by <command>login</command> or an
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| 23 | application designed to handle the login function. In this chapter, we show
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| 24 | how to enhance <command>login</command> by setting policies with
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| 25 | <application>PAM</application> modules. Access via networks
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| 26 | can also be secured by policies set by <application>iptables</application>,
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| [30f88917] | 27 | commonly referred to as a firewall. The Network Security Services (NSS) and
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| 28 | Netscape Portable Runtime (NSPR) libraries can be installed and shared among
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| 29 | the many applications requiring them. For applications that don't offer the
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| [2dbd7a5f] | 30 | best security, you can use the <application>Stunnel</application> package to
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| 31 | wrap an application daemon inside an SSL tunnel.</para>
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| 32 |
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| 33 | <para>Prevention of breaches, like a trojan, are assisted by applications like
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| 34 | <application>GnuPG</application>, specifically the ability to confirm signed
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| [d2223d8] | 35 | packages, which recognizes modifications of the tarball
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| [2dbd7a5f] | 36 | after the packager creates it.</para>
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| 37 |
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| 38 | <para> Finally, we touch on detection with a package that stores "signatures"
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| 39 | of critical files (defined by the administrator) and then regenerates those
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| 40 | "signatures" and compares for files that have been changed.</para>
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| 41 |
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| 42 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="openssl.xml"/>
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| [d5404360] | 43 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gnutls.xml"/>
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| [2dbd7a5f] | 44 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="cracklib.xml"/>
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| [9ad7046] | 45 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="linux-pam.xml"/>
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| [2dbd7a5f] | 46 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="shadow.xml"/>
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| 47 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="iptables.xml"/>
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| 48 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="firewalling.xml"/>
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| 49 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gnupg.xml"/>
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| [618aef19] | 50 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="gnupg2.xml"/>
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| [2dbd7a5f] | 51 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="tripwire.xml"/>
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| 52 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="heimdal.xml"/>
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| 53 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="mitkrb.xml"/>
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| 54 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="cyrus-sasl.xml"/>
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| 55 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="stunnel.xml"/>
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| [cf341b4] | 56 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="sudo.xml"/>
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| [30f88917] | 57 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="nss.xml"/>
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| [012cdc8] | 58 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="policykit.xml"/>
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| [9d3d8a8] | 59 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="polkit.xml"/>
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| [b9df1a8] | 60 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="polkit-gnome.xml"/>
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| [6d32e7af] | 61 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="consolekit.xml"/>
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| [2ac4928] | 62 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="attr.xml"/>
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| [1f25cea9] | 63 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" href="acl.xml"/>
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| [f45b1953] | 64 |
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| 65 | </chapter>
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