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 tripwire-download-http "&sourceforge-repo;/tripwire/tripwire-&tripwire-version;-src.tar.bz2">
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8 | <!ENTITY tripwire-download-ftp " ">
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9 | <!ENTITY tripwire-md5sum "2462ea16fb0b5ae810471011ad2f2dd6">
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10 | <!ENTITY tripwire-size "704 KB">
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11 | <!ENTITY tripwire-buildsize "31 MB">
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12 | <!ENTITY tripwire-time "1.3 SBU (includes interactive time during install)">
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13 | ]>
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14 |
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15 | <sect1 id="tripwire" xreflabel="Tripwire-&tripwire-version;">
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16 | <?dbhtml filename="tripwire.html"?>
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17 |
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18 | <sect1info>
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19 | <othername>$LastChangedBy$</othername>
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20 | <date>$Date$</date>
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21 | </sect1info>
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22 |
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23 | <title>Tripwire-&tripwire-version;</title>
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24 |
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25 | <indexterm zone="tripwire">
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26 | <primary sortas="a-Tripwire">Tripwire</primary>
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27 | </indexterm>
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28 |
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29 | <sect2 role="package">
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30 | <title>Introduction to Tripwire</title>
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31 |
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32 | <para>The <application>Tripwire</application> package contains programs
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33 | used to verify the integrity of the files on a given system.</para>
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34 |
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35 | &lfs70_checked;
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36 |
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37 | <bridgehead renderas="sect3">Package Information</bridgehead>
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38 | <itemizedlist spacing="compact">
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39 | <listitem>
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40 | <para>Download (HTTP): <ulink url="&tripwire-download-http;"/></para>
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41 | </listitem>
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42 | <listitem>
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43 | <para>Download (FTP): <ulink url="&tripwire-download-ftp;"/></para>
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44 | </listitem>
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45 | <listitem>
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46 | <para>Download MD5 sum: &tripwire-md5sum;</para>
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47 | </listitem>
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48 | <listitem>
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49 | <para>Download size: &tripwire-size;</para>
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50 | </listitem>
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51 | <listitem>
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52 | <para>Estimated disk space required: &tripwire-buildsize;</para>
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53 | </listitem>
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54 | <listitem>
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55 | <para>Estimated build time: &tripwire-time;</para>
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56 | </listitem>
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57 | </itemizedlist>
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58 |
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59 | <bridgehead renderas="sect3">Tripwire Dependencies</bridgehead>
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60 |
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61 | <bridgehead renderas="sect4">Required</bridgehead>
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62 | <para role="required"><xref linkend="openssl"/></para>
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63 |
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64 |
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65 | <bridgehead renderas="sect4">Optional</bridgehead>
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66 | <para role="optional">An <xref linkend="server-mail"/></para>
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67 |
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68 | <para condition="html" role="usernotes">User Notes:
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69 | <ulink url="&blfs-wiki;/tripwire"/></para>
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70 |
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71 | </sect2>
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72 |
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73 | <sect2 role="installation">
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74 | <title>Installation of Tripwire</title>
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75 |
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76 | <para>Compile <application>Tripwire</application> by running the following
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77 | commands:</para>
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78 |
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79 | <screen><userinput>sed -i -e 's@TWDB="${prefix}@TWDB="/var@' install/install.cfg &&
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80 | ./configure --prefix=/usr --sysconfdir=/etc/tripwire &&
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81 | make</userinput></screen>
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82 |
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83 | <warning><para>The default configuration is to use a local MTA. If
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84 | you don't have an MTA installed and have no wish to install
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85 | one, modify <filename>install/install.cfg</filename> to use an SMTP
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86 | server instead. Otherwise the install will fail.</para></warning>
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87 |
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88 | <para>This package does not come with a test suite.</para>
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89 |
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90 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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91 |
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92 | <screen role="root"><userinput>make install &&
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93 | cp -v policy/*.txt /usr/doc/tripwire</userinput></screen>
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94 |
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95 | </sect2>
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96 |
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97 | <sect2 role="commands">
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98 | <title>Command Explanations</title>
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99 |
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100 | <para><command>sed -i -e 's@TWDB="${prefix}@TWDB="/var@'
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101 | install/install.cfg</command>: This command tells the package to install
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102 | the program database and reports in
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103 | <filename class="directory">/var/lib/tripwire</filename>.</para>
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104 |
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105 | <para><command>make install</command>: This command creates the
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106 | <application>Tripwire</application> security keys as well as installing
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107 | the binaries. There are two keys: a site key and a local key which are
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108 | stored in <filename class="directory">/etc/tripwire/</filename>.</para>
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109 |
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110 | <para><command>cp -v policy/*.txt /usr/doc/tripwire</command>: This command
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111 | installs the <application>tripwire</application> sample policy files with
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112 | the other <application>tripwire</application> documentation.</para>
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113 |
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114 | </sect2>
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115 |
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116 | <sect2 role="configuration">
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117 | <title>Configuring Tripwire</title>
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118 |
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119 | <sect3 id="tripwire-config">
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120 | <title>Config Files</title>
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121 |
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122 | <para><filename>/etc/tripwire/*</filename></para>
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123 |
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124 | <indexterm zone="tripwire tripwire-config">
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125 | <primary sortas="e-etc-tripwire">/etc/tripwire/*</primary>
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126 | </indexterm>
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127 |
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128 | </sect3>
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129 |
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130 | <sect3>
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131 | <title>Configuration Information</title>
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132 |
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133 | <para><application>Tripwire</application> uses a policy file to
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134 | determine which files are integrity checked. The default policy
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135 | file (<filename>/etc/tripwire/twpol.txt</filename>) is for a
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136 | default installation and will need to be updated for your
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137 | system.</para>
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138 |
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139 | <para>Policy files should be tailored to each individual distribution
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140 | and/or installation. Some example policy files can be found in <filename
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141 | class="directory">/usr/doc/tripwire/</filename> (Note that <filename
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142 | class="directory">/usr/doc/</filename> is a symbolic link on LFS systems
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143 | to <filename class="directory">/usr/share/doc/</filename>).</para>
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144 |
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145 | <para>If desired, copy the policy file you'd like to try into <filename
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146 | class="directory">/etc/tripwire/</filename> instead of using the default
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147 | policy file, <filename>twpol.txt</filename>. It is, however, recommended
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148 | that you edit your policy file. Get ideas from the examples above and
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149 | read <filename>/usr/doc/tripwire/policyguide.txt</filename> for
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150 | additional information. <filename>twpol.txt</filename> is a good policy
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151 | file for learning about <application>Tripwire</application> as it will
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152 | note any changes to the file system and can even be used as an annoying
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153 | way of keeping track of changes for uninstallation of software.</para>
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154 |
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155 | <para>After your policy file has been edited to your satisfaction you may
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156 | begin the configuration steps (perform as the <systemitem
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157 | class='username'>root</systemitem>) user:</para>
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158 |
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159 | <screen role="root"><userinput>twadmin --create-polfile --site-keyfile /etc/tripwire/site.key \
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160 | /etc/tripwire/twpol.txt &&
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161 | tripwire --init</userinput></screen>
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162 |
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163 | <para>Depending on your system and the contents of the policy file, the
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164 | initialization phase above can take a relatively long time.</para>
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165 |
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166 | </sect3>
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167 |
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168 | <sect3>
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169 | <title>Usage Information</title>
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170 |
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171 | <para><application>Tripwire</application> will identify file changes in
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172 | the critical system files specified in the policy file. Using
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173 | <application>Tripwire</application> while making frequent changes to
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174 | these directories will flag all these changes. It is most useful after a
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175 | system has reached a configuration that the user considers stable.</para>
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176 |
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177 | <para>To use <application>Tripwire</application> after creating a policy
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178 | file to run a report, use the following command:</para>
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179 |
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180 | <screen role="root"><userinput>tripwire --check > /etc/tripwire/report.txt</userinput></screen>
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181 |
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182 | <para>View the output to check the integrity of your files. An automatic
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183 | integrity report can be produced by using a cron facility to schedule the
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184 | runs.</para>
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185 |
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186 | <para>Reports are stored in binary and, if desired, encrypted. View reports,
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187 | as the <systemitem class="username">root</systemitem> user, with:</para>
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188 |
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189 | <screen role="root">twprint --print-report -r /var/lib/tripwire/report/<replaceable><report-name.twr></replaceable></screen>
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190 |
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191 | <para>After you run an integrity check, you should examine the
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192 | report (or email) and then modify the <application>Tripwire</application>
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193 | database to reflect the changed files on your system. This is so that
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194 | <application>Tripwire</application> will not continually notify you that
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195 | files you intentionally changed are a security violation. To do this you
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196 | must first <command>ls -l /var/lib/tripwire/report/</command> and note
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197 | the name of the newest file which starts with your system name as
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198 | presented by the command <userinput>uname -n</userinput>
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199 | and ends in <filename>.twr</filename>. These files were created
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200 | during report creation and the most current one is needed to update the
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201 | <application>Tripwire</application> database of your system. As the
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202 | <systemitem class='username'>root</systemitem> user, type in the
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203 | following command making the appropriate report name:</para>
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204 |
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205 | <screen role="root"><userinput>tripwire --update --twrfile /var/lib/tripwire/report/<replaceable><report-name.twr></replaceable></userinput></screen>
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206 |
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207 | <para>You will be placed into <application>Vim</application> with a copy
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208 | of the report in front of you. If all the changes were good, then just
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209 | type <command>:wq</command> and after entering your local key, the database
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210 | will be updated. If there are files which you still want to be warned
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211 | about, remove the 'x' before the filename in the report and type
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212 | <command>:wq</command>.</para>
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213 |
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214 | <para>A good summary of tripwire operations can be found at
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215 | <ulink url="http://va-holladays.no-ip.info:2200/tools/security-docs/tripwire-v1.0.pdf"/>.</para>
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216 |
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217 | </sect3>
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218 |
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219 | <sect3>
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220 | <title>Changing the Policy File</title>
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221 |
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222 | <para>If you are unhappy with your policy file and would like to modify
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223 | it or use a new one, modify the policy file and then execute the following
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224 | commands as the <systemitem class='username'>root</systemitem> user:</para>
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225 |
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226 | <screen role="root"><userinput>twadmin --create-polfile /etc/tripwire/twpol.txt &&
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227 | tripwire --init</userinput></screen>
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228 |
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229 | </sect3>
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230 |
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231 | </sect2>
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232 |
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233 | <sect2 role="content">
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234 | <title>Contents</title>
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235 |
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236 | <segmentedlist>
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237 | <segtitle>Installed Programs</segtitle>
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238 | <segtitle>Installed Libraries</segtitle>
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239 | <segtitle>Installed Directories</segtitle>
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240 |
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241 | <seglistitem>
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242 | <seg>siggen, tripwire, twadmin, and twprint</seg>
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243 | <seg>None</seg>
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244 | <seg>/etc/tripwire, /var/lib/tripwire, and /usr/share/doc/tripwire</seg>
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245 | </seglistitem>
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246 | </segmentedlist>
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247 |
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248 | <variablelist>
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249 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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250 | <?dbfo list-presentation="list"?>
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251 | <?dbhtml list-presentation="table"?>
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252 |
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253 | <varlistentry id="siggen">
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254 | <term><command>siggen</command></term>
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255 | <listitem>
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256 | <para>is a signature gathering utility that displays
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257 | the hash function values for the specified files.</para>
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258 | <indexterm zone="tripwire siggen">
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259 | <primary sortas="b-siggen">siggen</primary>
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260 | </indexterm>
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261 | </listitem>
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262 | </varlistentry>
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263 |
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264 | <varlistentry id='tripwire-program'>
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265 | <term><command>tripwire</command></term>
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266 | <listitem>
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267 | <para>is the main file integrity checking program.</para>
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268 | <indexterm zone="tripwire tripwire">
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269 | <primary sortas="b-tripwire">tripwire</primary>
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270 | </indexterm>
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271 | </listitem>
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272 | </varlistentry>
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273 |
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274 | <varlistentry id='twadmin'>
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275 | <term><command>twadmin</command></term>
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276 | <listitem>
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277 | <para>administrative and utility tool used to perform
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278 | certain administrative functions related to
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279 | <application>Tripwire</application> files and configuration
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280 | options.</para>
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281 | <indexterm zone="tripwire twadmin">
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282 | <primary sortas="b-twadmin">twadmin</primary>
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283 | </indexterm>
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284 | </listitem>
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285 | </varlistentry>
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286 |
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287 | <varlistentry id='twprint'>
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288 | <term><command>twprint</command></term>
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289 | <listitem>
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290 | <para>prints <application>Tripwire</application>
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291 | database and report files in clear text format.</para>
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292 | <indexterm zone="tripwire twprint">
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293 | <primary sortas="b-twprint">twprint</primary>
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294 | </indexterm>
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295 | </listitem>
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296 | </varlistentry>
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297 |
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298 | </variablelist>
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299 |
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300 | </sect2>
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301 |
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302 | </sect1>
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