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 tripwire-download-http "http://prdownloads.sourceforge.net/tripwire/tripwire-&tripwire-version;.tar.gz">
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8 | <!ENTITY tripwire-download-ftp "ftp://ftp.fu-berlin.de/unix/security/tripwire/tripwire-&tripwire-version;.tar.gz">
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9 | <!ENTITY tripwire-size "1.4 MB">
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10 | <!ENTITY tripwire-buildsize "63 MB">
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11 | <!ENTITY tripwire-time "2.35 SBU">
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12 | ]>
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13 |
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14 | <sect1 id="tripwire" xreflabel="Tripwire-&tripwire-version;">
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15 | <?dbhtml filename="tripwire.html"?>
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16 | <title>Tripwire-&tripwire-version;</title>
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17 |
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18 | <sect2>
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19 | <title>Introduction to <application>Tripwire</application></title>
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20 |
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21 | <para>The <application>Tripwire</application> package contains programs used
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22 | to verify the integrity of the files on a given system.</para>
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23 |
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24 | <sect3><title>Package information</title>
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25 | <itemizedlist spacing='compact'>
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26 | <listitem><para>Download (HTTP): <ulink
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27 | url="&tripwire-download-http;"/></para></listitem>
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28 | <listitem><para>Download (FTP): <ulink
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29 | url="&tripwire-download-ftp;"/></para></listitem>
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30 | <listitem><para>Download size: &tripwire-size;</para></listitem>
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31 | <listitem><para>Estimated Disk space required:
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32 | &tripwire-buildsize;</para></listitem>
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33 | <listitem><para>Estimated build time:
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34 | &tripwire-time;</para></listitem></itemizedlist>
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35 | </sect3>
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36 |
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37 | <sect3><title>Additional downloads</title>
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38 | <itemizedlist spacing='compact'>
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39 | <listitem><para>Required patch to fix multiple build issues (see patch for
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40 | more information): <ulink
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41 | url="&patch-root;/tripwire-&tripwire-version;-gcc3_build_fixes-1.patch"/></para></listitem>
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42 | </itemizedlist>
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43 | </sect3>
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44 |
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45 | <sect3><title><application>Tripwire</application> dependencies</title>
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46 | <sect4><title>Optional</title>
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47 | <para><acronym>MTA</acronym> (See <xref linkend="server-mail"/>)</para></sect4>
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48 | </sect3>
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49 |
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50 | </sect2>
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51 |
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52 | <sect2>
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53 | <title>Installation of <application>Tripwire</application></title>
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54 |
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55 | <para>Compile <application>Tripwire</application> by running the following
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56 | commands:</para>
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57 |
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58 | <screen><userinput><command>patch -Np1 -i ../tripwire-&tripwire-version;-gcc3_build_fixes-1.patch &&
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59 | make -C src release &&
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60 | cp install/install.{sh,cfg} .</command></userinput></screen>
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61 |
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62 | <para>The default configuration is to use a local <acronym>MTA</acronym>. If
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63 | you don't have an <acronym>MTA</acronym> installed and have no wish to install
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64 | one, modify <filename>install.cfg</filename> to use an <acronym>SMTP</acronym>
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65 | server instead. Install <application>Tripwire</application> by running the
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66 | following commands:</para>
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67 |
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68 | <screen><userinput><command>./install.sh &&
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69 | cp /etc/tripwire/tw.cfg /usr/sbin &&
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70 | cp policy/*.txt /usr/share/doc/tripwire</command></userinput></screen>
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71 |
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72 | </sect2>
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73 |
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74 | <sect2>
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75 | <title>Command explanations</title>
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76 |
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77 | <para><command>make release</command>: This command creates the
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78 | <application>Tripwire</application> binaries.</para>
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79 |
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80 | <para><command>cp install.{sh,cfg} .</command>: These files are copied to
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81 | the main <application>Tripwire</application> directory so that the script
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82 | can be used to install the package.</para>
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83 |
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84 | <para><command>cp policy/*.txt /usr/share/doc/tripwire</command>: This command
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85 | installs the documentation.</para>
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86 |
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87 | </sect2>
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88 |
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89 | <sect2>
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90 | <title>Configuring <application>Tripwire</application></title>
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91 |
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92 | <sect3><title>Config files</title>
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93 | <para><filename>/etc/tripwire/*</filename></para>
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94 | </sect3>
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95 |
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96 | <sect3><title>Configuration Information</title>
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97 |
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98 | <para><application>Tripwire</application> uses a policy file to determine which
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99 | files are integrity checked. The default policy file
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100 | (<filename>/etc/tripwire/twpol.txt</filename>) is for a default
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101 | installation of Redhat 7.0 and is woefully outdated.</para>
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102 |
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103 | <para>Policy files are also a custom thing and should be tailored to each
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104 | individual distribution and/or installation. Some custom policy files can be
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105 | found below: </para>
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106 |
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107 | <screen><ulink url="http://home.iprimus.com.au/glombowski/blfs/twpol-all.txt"/>
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108 | Checks integrity of all files
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109 | <ulink url="http://home.iprimus.com.au/glombowski/blfs/twpol-lfs.txt"/>
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110 | Custom policy file for Base LFS 3.0 system
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111 | <ulink url="http://home.iprimus.com.au/glombowski/blfs/twpol-suse7.2.txt"/>
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112 | Custom policy file for SuSE 7.2 system</screen>
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113 |
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114 | <para>Download the custom policy file you'd like to try, copy it into
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115 | <filename class="directory">/etc/tripwire/</filename>, and use it instead of
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116 | <filename>twpol.txt</filename>. It is, however, recommended that you make
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117 | your own policy file. Get ideas from the examples above and read
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118 | <filename>/usr/share/doc/tripwire/policyguide.txt</filename> for additional
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119 | information. <filename>twpol.txt</filename> is a good policy file for beginners
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120 | as it will note any changes to the file system and can even be used as an
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121 | annoying way of keeping track of changes for uninstallation of software.</para>
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122 |
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123 | <para>After your policy file has been transferred to
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124 | <filename class="directory">/etc/tripwire/</filename> you may begin the
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125 | configuration steps:</para>
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126 |
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127 | <screen><userinput><command>twadmin -m P /etc/tripwire/twpol.txt &&
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128 | tripwire -m i</command></userinput></screen>
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129 |
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130 | <para>During installation <application>Tripwire</application> will create two
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131 | keys: a site key and a local key which are stored in
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132 | <filename class="directory">/etc/tripwire/</filename>.</para>
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133 |
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134 | </sect3>
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135 |
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136 | <sect3><title>Usage Information</title>
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137 | <para>To use <application>Tripwire</application> after creating a policy file
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138 | to run a report, use the following command:</para>
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139 |
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140 | <screen><userinput><command>tripwire -m c > /etc/tripwire/report.txt</command></userinput></screen>
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141 |
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142 | <para>View the output to check the integrity of your files. An automatic
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143 | integrity report can be produced by using a cron facility to schedule
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144 | the runs.</para>
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145 |
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146 | <para>Please note that after you run an integrity check, you must examine
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147 | the report (or email) and then modify the <application>Tripwire</application>
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148 | database to reflect the changed files on your system. This is so that
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149 | <application>Tripwire</application> will not continually notify you that
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150 | files you intentionally changed are a security violation. To do this you
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151 | must first <command>ls -l /var/lib/tripwire/report/</command> and note
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152 | the name of the newest file which starts with <filename>linux-</filename> and
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153 | ends in <filename>.twr</filename>. This encrypted file was created during the
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154 | last report creation and is needed to update the
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155 | <application>Tripwire</application> database of your
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156 | system. Then, type in the following command making the appropriate
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157 | substitutions for <replaceable>[?]</replaceable>:</para>
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158 |
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159 | <screen><userinput><command>tripwire -m u -r /var/lib/tripwire/report/linux-<replaceable>[???????]</replaceable>-<replaceable>[??????]</replaceable>.twr</command></userinput></screen>
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160 |
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161 | <para>You will be placed into <application>vim</application> with a copy of
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162 | the report in front of you. If all the changes were good, then just type
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163 | <command>:x</command> and after entering your local key, the database will be
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164 | updated. If there are files which you still want to be warned about, remove the
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165 | 'x' before the filename in the report and type <command>:x</command>.</para>
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166 |
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167 | </sect3>
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168 |
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169 | <sect3><title>Changing the Policy File</title>
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170 |
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171 | <para>If you are unhappy with your policy file and would like to modify it or
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172 | use a new one, modify the policy file and then execute the following
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173 | commands:</para>
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174 |
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175 | <screen><userinput><command>twadmin -m P /etc/tripwire/twpol.txt &&
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176 | tripwire -m i</command></userinput></screen>
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177 |
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178 | </sect3>
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179 |
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180 | </sect2>
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181 |
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182 | <sect2>
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183 | <title>Contents</title>
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184 |
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185 | <para>The <application>Tripwire</application> package contains
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186 | <command>siggen</command>, <command>tripwire</command>,
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187 | <command>twadmin</command> and <command>twprint</command>.</para>
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188 |
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189 | </sect2>
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190 |
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191 | <sect2>
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192 | <title>Description</title>
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193 |
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194 | <sect3>
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195 | <title>siggen</title>
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196 | <para><command>siggen</command> is a signature gathering utility that displays
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197 | the hash function values for the specified files.</para></sect3>
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198 |
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199 | <sect3>
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200 | <title>tripwire</title>
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201 | <para><command>tripwire</command> is the main file integrity checking program.
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202 | </para></sect3>
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203 |
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204 | <sect3>
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205 | <title>twadmin</title>
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206 | <para><command>twadmin</command> is <application>Tripwire</application>'s
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207 | administrative and utility tool used to perform certain administrative
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208 | functions related to <application>Tripwire</application> files and
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209 | configuration options.</para></sect3>
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210 |
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211 | <sect3>
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212 | <title>twprint</title>
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213 | <para><command>twprint</command> prints <application>Tripwire</application>
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214 | database and report files in clear text format.</para></sect3>
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215 |
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216 | </sect2>
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217 |
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218 | </sect1>
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219 |
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