1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.4/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;-src.tar.bz2?download">
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8 | <!ENTITY tripwire-download-ftp " ">
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9 | <!ENTITY tripwire-md5sum "b371f79ac23cacc9ad40b1da76b4a0c4">
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10 | <!ENTITY tripwire-size "1.2 MB">
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11 | <!ENTITY tripwire-buildsize "37 MB">
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12 | <!ENTITY tripwire-time "1.6 SBU">
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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 | <keywordset>
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22 | <keyword role="package">tripwire-&tripwire-version;.tar</keyword>
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23 | <keyword role="ftpdir">tripwire</keyword>
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24 | </keywordset>
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25 | </sect1info>
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26 |
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27 | <title>Tripwire-&tripwire-version;</title>
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28 |
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29 | <indexterm zone="tripwire">
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30 | <primary sortas="a-Tripwire">Tripwire</primary>
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31 | </indexterm>
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32 |
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33 | <sect2 role="package">
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34 | <title>Introduction to Tripwire</title>
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35 |
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36 | <para>The <application>Tripwire</application> package contains programs
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37 | used to verify the integrity of the files on a given system.</para>
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38 |
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39 | <bridgehead renderas="sect3">Package Information</bridgehead>
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40 | <itemizedlist spacing="compact">
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41 | <listitem>
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42 | <para>Download (HTTP): <ulink url="&tripwire-download-http;"/></para>
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43 | </listitem>
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44 | <listitem>
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45 | <para>Download (FTP): <ulink url="&tripwire-download-ftp;"/></para>
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46 | </listitem>
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47 | <listitem>
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48 | <para>Download MD5 sum: &tripwire-md5sum;</para>
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49 | </listitem>
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50 | <listitem>
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51 | <para>Download size: &tripwire-size;</para>
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52 | </listitem>
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53 | <listitem>
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54 | <para>Estimated disk space required: &tripwire-buildsize;</para>
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55 | </listitem>
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56 | <listitem>
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57 | <para>Estimated build time: &tripwire-time;</para>
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58 | </listitem>
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59 | </itemizedlist>
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60 |
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61 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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62 | <itemizedlist spacing="compact">
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63 | <listitem>
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64 | <para>Required patch:
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65 | <ulink url="&patch-root;/tripwire-&tripwire-version;-gcc4_build_fixes-1.patch"/>
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66 | </para>
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67 | </listitem>
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68 | </itemizedlist>
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69 |
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70 | <bridgehead renderas="sect3">Tripwire Dependencies</bridgehead>
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71 |
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72 | <bridgehead renderas="sect4">Required</bridgehead>
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73 | <para role="required"><xref linkend="openssl"/></para>
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74 |
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75 |
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76 | <bridgehead renderas="sect4">Optional</bridgehead>
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77 | <para role="optional">MTA (See <xref linkend="server-mail"/>)</para>
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78 |
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79 | <para condition="html" role="usernotes">User Notes:
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80 | <ulink url="&blfs-wiki;/tripwire"/></para>
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81 |
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82 | </sect2>
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83 |
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84 | <sect2 role="installation">
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85 | <title>Installation of Tripwire</title>
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86 |
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87 | <para>Compile <application>Tripwire</application> by running the following
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88 | commands:</para>
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89 |
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90 | <screen><userinput>ln -s contrib install &&
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91 | patch -Np1 -i ../tripwire-&tripwire-version;-gcc4_build_fixes-1.patch &&
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92 | sed -i -e 's@TWDB="${prefix}@TWDB="/var@' install/install.cfg &&
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93 | ./configure --prefix=/usr --sysconfdir=/etc/tripwire &&
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94 | make</userinput></screen>
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95 |
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96 | <warning><para>The default configuration is to use a local MTA. If
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97 | you don't have an MTA installed and have no wish to install
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98 | one, modify <filename>install/install.cfg</filename> to use an SMTP
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99 | server instead. Otherwise the install will fail.</para></warning>
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100 |
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101 | <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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102 |
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103 | <screen role="root"><userinput>make install &&
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104 | cp -v policy/*.txt /usr/share/doc/tripwire</userinput></screen>
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105 |
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106 | </sect2>
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107 |
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108 | <sect2 role="commands">
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109 | <title>Command Explanations</title>
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110 |
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111 | <para><command>ln -s contrib install</command>: This command creates
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112 | a symbolic link in the build directory needed for installation.</para>
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113 |
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114 | <para><command>sed -i -e 's@TWDB="${prefix}@TWDB="/var@'
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115 | install/install.cfg</command>: This command tells the package to install
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116 | the program database and reports in
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117 | <filename class="directory">/var/lib/tripwire</filename>.</para>
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118 |
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119 | <para><command>make install</command>: This command creates the
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120 | <application>Tripwire</application> security keys as well as installing
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121 | the binaries. There are two keys: a site key and a local key which are
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122 | stored in <filename class="directory">/etc/tripwire/</filename>.</para>
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123 |
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124 | <para><command>cp -v policy/*.txt /usr/share/doc/tripwire</command>: This
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125 | command installs the documentation.</para>
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126 |
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127 | </sect2>
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128 |
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129 | <sect2 role="configuration">
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130 | <title>Configuring Tripwire</title>
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131 |
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132 | <sect3 id="tripwire-config">
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133 | <title>Config Files</title>
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134 |
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135 | <para><filename>/etc/tripwire/*</filename></para>
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136 |
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137 | <indexterm zone="tripwire tripwire-config">
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138 | <primary sortas="e-etc-tripwire">/etc/tripwire/*</primary>
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139 | </indexterm>
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140 |
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141 | </sect3>
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142 |
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143 | <sect3>
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144 | <title>Configuration Information</title>
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145 |
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146 | <para><application>Tripwire</application> uses a policy file to
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147 | determine which files are integrity checked. The default policy
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148 | file (<filename>/etc/tripwire/twpol.txt</filename>) is for a
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149 | default Redhat installation and will need to be updated for your
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150 | system.</para>
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151 |
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152 | <para>Policy files should be tailored to each individual distribution
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153 | and/or installation. Some custom policy files can be found below:</para>
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154 |
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155 | <literallayout><ulink url="http://home.iprimus.com.au/glombowski/blfs/twpol-all.txt"/>
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156 | Checks integrity of all files
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157 | <ulink url="http://home.iprimus.com.au/glombowski/blfs/twpol-lfs.txt"/>
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158 | Custom policy file for Base LFS 3.0 system
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159 | <ulink url="http://home.iprimus.com.au/glombowski/blfs/twpol-suse7.2.txt"/>
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160 | Custom policy file for SuSE 7.2 system</literallayout>
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161 |
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162 | <para>Download the custom policy file you'd like to try, copy it into
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163 | <filename class="directory">/etc/tripwire/</filename>, and use it instead
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164 | of <filename>twpol.txt</filename>. It is, however, recommended that you
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165 | make your own policy file. Get ideas from the examples above and read
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166 | <filename>/usr/share/doc/tripwire/policyguide.txt</filename> for
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167 | additional information. <filename>twpol.txt</filename> is a good policy
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168 | file for beginners as it will note any changes to the file system and can
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169 | even be used as an annoying way of keeping track of changes for
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170 | uninstallation of software.</para>
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171 |
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172 | <para>After your policy file has been transferred to
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173 | <filename class="directory">/etc/tripwire/</filename> you may begin
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174 | the configuration steps (perform as the
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175 | <systemitem class='username'>root</systemitem>):</para>
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176 |
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177 | <screen role="root"><userinput>twadmin --create-polfile --site-keyfile /etc/tripwire/site.key \
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178 | /etc/tripwire/twpol.txt &&
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179 | tripwire --init</userinput></screen>
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180 |
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181 | </sect3>
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182 |
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183 | <sect3>
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184 | <title>Usage Information</title>
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185 |
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186 | <para>To use <application>Tripwire</application> after creating a policy
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187 | file to run a report, use the following command:</para>
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188 |
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189 | <screen role="root"><userinput>tripwire --check > /etc/tripwire/report.txt</userinput></screen>
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190 |
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191 | <para>View the output to check the integrity of your files. An automatic
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192 | integrity report can be produced by using a cron facility to schedule
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193 | the runs.</para>
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194 |
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195 | <para>Please note that after you run an integrity check, you must
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196 | examine the report (or email) and then modify the
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197 | <application>Tripwire</application> database to reflect the changed
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198 | files on your system. This is so that <application>Tripwire</application>
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199 | will not continually notify you that files you intentionally changed are
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200 | a security violation. To do this you must first <command>ls -l
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201 | /var/lib/tripwire/report/</command> and note the name of the newest file
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202 | which starts with <filename>linux-</filename> and ends in
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203 | <filename>.twr</filename>. This encrypted file was created during the
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204 | last report creation and is needed to update the
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205 | <application>Tripwire</application> database of your system. Then, as the
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206 | <systemitem class='username'>root</systemitem> user, type
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207 | in the following command making the appropriate substitutions for
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208 | <replaceable><?></replaceable>:</para>
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209 |
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210 | <screen role="root"><userinput>tripwire --update -twrfile \
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211 | /var/lib/tripwire/report/linux-<replaceable><???????></replaceable>-<replaceable><??????></replaceable>.twr</userinput></screen>
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212 |
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213 | <para>You will be placed into <application>vim</application> with a copy
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214 | of the report in front of you. If all the changes were good, then just
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215 | type <command>:x</command> and after entering your local key, the database
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216 | will be updated. If there are files which you still want to be warned
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217 | about, remove the 'x' before the filename in the report and type
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218 | <command>:x</command>.</para>
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219 |
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220 |
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221 | <para>A good summary of tripwire operations can be found at
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222 | <ulink url="http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/ref-guide/ch-tripwire.html"/>.</para>
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223 |
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224 | </sect3>
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225 |
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226 | <sect3>
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227 | <title>Changing the Policy File</title>
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228 |
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229 | <para>If you are unhappy with your policy file and would like to modify
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230 | it or use a new one, modify the policy file and then execute the following
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231 | commands as the <systemitem class='username'>root</systemitem> user:</para>
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232 |
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233 | <screen role="root"><userinput>twadmin --create-polfile /etc/tripwire/twpol.txt &&
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234 | tripwire --init</userinput></screen>
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235 |
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236 | </sect3>
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237 |
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238 | </sect2>
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239 |
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240 | <sect2 role="content">
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241 | <title>Contents</title>
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242 |
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243 | <segmentedlist>
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244 | <segtitle>Installed Programs</segtitle>
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245 | <segtitle>Installed Libraries</segtitle>
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246 | <segtitle>Installed Directories</segtitle>
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247 |
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248 | <seglistitem>
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249 | <seg>siggen, tripwire, twadmin, and twprint.</seg>
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250 | <seg>None</seg>
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251 | <seg>/etc/tripwire, /usr/share/doc/tripwire, and /var/lib/tripwire</seg>
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252 | </seglistitem>
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253 | </segmentedlist>
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254 |
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255 | <variablelist>
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256 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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257 | <?dbfo list-presentation="list"?>
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258 | <?dbhtml list-presentation="table"?>
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259 |
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260 | <varlistentry id="siggen">
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261 | <term><command>siggen</command></term>
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262 | <listitem>
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263 | <para>is a signature gathering utility that displays
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264 | the hash function values for the specified files.</para>
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265 | <indexterm zone="tripwire siggen">
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266 | <primary sortas="b-siggen">siggen</primary>
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267 | </indexterm>
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268 | </listitem>
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269 | </varlistentry>
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270 |
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271 | <varlistentry id='tripwire-program'>
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272 | <term><command>tripwire</command></term>
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273 | <listitem>
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274 | <para>is the main file integrity checking program.</para>
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275 | <indexterm zone="tripwire tripwire">
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276 | <primary sortas="b-tripwire">tripwire</primary>
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277 | </indexterm>
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278 | </listitem>
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279 | </varlistentry>
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280 |
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281 | <varlistentry id='twadmin'>
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282 | <term><command>twadmin</command></term>
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283 | <listitem>
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284 | <para>administrative and utility tool used to perform
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285 | certain administrative functions related to
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286 | <application>Tripwire</application> files and configuration
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287 | options.</para>
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288 | <indexterm zone="tripwire twadmin">
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289 | <primary sortas="b-twadmin">twadmin</primary>
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290 | </indexterm>
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291 | </listitem>
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292 | </varlistentry>
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293 |
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294 | <varlistentry id='twprint'>
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295 | <term><command>twprint</command></term>
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296 | <listitem>
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297 | <para>prints <application>Tripwire</application>
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298 | database and report files in clear text format.</para>
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299 | <indexterm zone="tripwire twprint">
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300 | <primary sortas="b-twprint">twprint</primary>
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301 | </indexterm>
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302 | </listitem>
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303 | </varlistentry>
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304 |
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305 | </variablelist>
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306 |
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307 | </sect2>
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308 |
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309 | </sect1>
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