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2174baa3e8
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@3876 af4574ff-66df-0310-9fd7-8a98e5e911e0
333 lines
12 KiB
XML
333 lines
12 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY ethereal-download-http "http://www.ethereal.com/distribution/ethereal-ðereal-version;.tar.bz2">
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<!ENTITY ethereal-download-ftp "ftp://ftp.ethereal.com/pub/ethereal/all-versions/ethereal-ðereal-version;.tar.bz2">
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<!ENTITY ethereal-md5sum "f8b7a2c2dcf273e7fd755f972167dacb">
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<!ENTITY ethereal-size "5.4 MB">
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<!ENTITY ethereal-buildsize "194 MB">
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<!ENTITY ethereal-time "3.78 SBU">
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]>
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<sect1 id="ethereal" xreflabel="Ethereal-ðereal-version;">
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<?dbhtml filename="ethereal.html"?>
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<sect1info>
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<othername>$LastChangedBy$</othername>
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<date>$Date$</date>
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</sect1info>
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<title>Ethereal-ðereal-version;</title>
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<indexterm zone="ethereal">
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<primary sortas="a-Ethereal">Ethereal</primary>
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</indexterm>
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<sect2 role="package">
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<title>Introduction to Ethereal</title>
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<para>The <application>Ethereal</application> package contains a network
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protocol analyzer, also known as a <quote>sniffer</quote>. This is useful for
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analyzing data captured <quote>off the wire</quote> from a live network
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connection, or data read from a capture file. <application>Ethereal</application>
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provides both GUI and TTY-mode programs for examining captured network packets
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from over 500 protocols, as well as the capability to read capture files from
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many other popular network analyzers.</para>
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<bridgehead renderas="sect3">Package Information</bridgehead>
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<itemizedlist spacing="compact">
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<listitem>
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<para>Download (HTTP): <ulink url="ðereal-download-http;"/></para>
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</listitem>
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<listitem>
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<para>Download (FTP): <ulink url="ðereal-download-ftp;"/></para>
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</listitem>
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<listitem>
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<para>Download MD5 sum: ðereal-md5sum;</para>
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</listitem>
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<listitem>
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<para>Download size: ðereal-size;</para>
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</listitem>
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<listitem>
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<para>Estimated disk space required: ðereal-buildsize;</para>
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</listitem>
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<listitem>
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<para>Estimated build time: ðereal-time;</para>
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</listitem>
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</itemizedlist>
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<bridgehead renderas="sect3">Ethereal dependencies</bridgehead>
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<bridgehead renderas="sect4">Required</bridgehead>
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<para><xref linkend="GLib"/> or <xref linkend="glib2"/> (to build the
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TTY-mode front-end only)</para>
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<bridgehead renderas="sect4">Recommended</bridgehead>
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<para><xref linkend="libpcap"/> (required to capture data)</para>
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<bridgehead renderas="sect4">Optional</bridgehead>
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<para><xref linkend="pkgconfig"/>,
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<xref linkend="GTK"/> or <xref linkend="gtk2"/> (to build the
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GUI front-end),
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<xref linkend="openssl"/>,
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<xref linkend="heimdal"/> or <xref linkend="mitkrb"/>,
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<xref linkend="python"/>,
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<xref linkend="pcre"/>,
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<xref linkend="doxygen"/>,
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<ulink url="http://www.net-snmp.org/">Net-SNMP</ulink> and
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<ulink url="http://www.gnu.org/software/adns/adns.html">adns</ulink></para>
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</sect2>
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<sect2 role="kernel" id="ethereal-kernel">
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<title>Kernel Configuration</title>
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<para>The kernel must have the Packet protocol enabled for
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<application>Ethereal</application> to capture live packets from the network.
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Enable the Packet protocol by choosing <quote>Y</quote> in the
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<quote>Device Drivers</quote> – <quote>Networking support</quote>
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– <quote>Networking options</quote> – <quote>Packet socket</quote>
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configuration parameter. Alternatively, build the af_packet module by choosing
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<quote>M</quote> in this parameter.</para>
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<indexterm zone="ethereal ethereal-kernel">
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<primary sortas="d-Capturing-network-packets">Capturing network
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packets</primary>
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</indexterm>
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</sect2>
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<sect2 role="installation">
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<title>Installation of Ethereal</title>
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<para>Install <application>Ethereal</application> by running the following
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commands:</para>
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<screen><userinput>./configure --prefix=/usr --sysconfdir=/etc \
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--enable-randpkt --enable-threads &&
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make</userinput></screen>
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<para>Now, as the <systemitem class="username">root</systemitem> user:</para>
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<screen role="root"><userinput>make install</userinput></screen>
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</sect2>
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<sect2 role="commands">
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<title>Command Explanations</title>
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<para><parameter>--enable-randpkt</parameter>: This parameter builds the random
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capture program.</para>
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<para><parameter>--enable-threads</parameter>: This parameter enables the use
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of threads in <command>ethereal</command>.</para>
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<para><option>--with-ssl</option>: This parameter enables the use of the
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<application>OpenSSL</application>
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<filename class='libraryfile'>libcrypto</filename> library.</para>
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</sect2>
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<sect2 role="configuration">
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<title>Configuring Ethereal</title>
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<sect3 id="ethereal-config">
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<title>Config Files</title>
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<para><filename>/etc/ethereal.conf</filename> and
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<filename>~/.ethereal/preferences</filename></para>
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<indexterm zone="ethereal ethereal-config">
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<primary sortas="e-AA.ethereal-preferences">~/.ethereal/preferences</primary>
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</indexterm>
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<indexterm zone="ethereal ethereal-config">
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<primary sortas="e-etc-ethereal.conf">/etc/ethereal.conf</primary>
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</indexterm>
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</sect3>
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<sect3>
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<title>Configuration Information</title>
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<para>Though the default configuration parameters are very sane,
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reference the configuration section of the
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<ulink url="http://www.ethereal.com/docs/user-guide/">Ethereal User's
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Guide</ulink> for configuration information. Most of
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<application>Ethereal</application>'s configuration can be accomplished
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using the menu options of the <command>ethereal</command>
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GUI interface.</para>
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<note>
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<para>If you want to look at packets, make sure you don't filter
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them out with <xref linkend="iptables"/>. If you want to exclude
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certain classes of packets, it is more efficient to do it with
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<application>iptables</application> than
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<application>Ethereal</application>.</para>
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</note>
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</sect3>
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</sect2>
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<sect2 role="content">
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<title>Contents</title>
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<segmentedlist>
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<segtitle>Installed Programs</segtitle>
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<segtitle>Installed Libraries</segtitle>
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<segtitle>Installed Directories</segtitle>
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<seglistitem>
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<seg>capinfos, dftest, editcap, ethereal, idl2eth, mergecap, randpkt,
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tethereal and text2pcap</seg>
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<seg>libethereal.so, libwiretap.so and numerous dissector plugin modules</seg>
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<seg>/usr/lib/ethereal and /usr/share/ethereal</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="capinfos">
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<term><command>capinfos</command></term>
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<listitem>
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<para>reads a saved capture file and returns any or all of several
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statistics about that file. It is able to detect and read any capture
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supported by the <application>Ethereal</application> package.</para>
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<indexterm zone="ethereal capinfos">
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<primary sortas="b-capinfos">capinfos</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="dftest">
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<term><command>dftest</command></term>
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<listitem>
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<para>is a display-filter-compiler test program.</para>
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<indexterm zone="ethereal dftest">
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<primary sortas="b-dftest">dftest</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="editcap">
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<term><command>editcap</command></term>
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<listitem>
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<para>edits and/or translates the format of capture files. It knows
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how to read <application>libpcap</application> capture files, including those
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of <command>tcpdump</command>, <application>Ethereal</application> and other
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tools that write captures in that format.</para>
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<indexterm zone="ethereal editcap">
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<primary sortas="b-editcap">editcap</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="ethereal-prog">
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<term><command>ethereal</command></term>
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<listitem>
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<para>is a GUI network protocol analyzer. It lets
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you interactively browse packet data from a live network or from a previously
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saved capture file.</para>
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<indexterm zone="ethereal ethereal-prog">
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<primary sortas="b-ethereal">ethereal</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="idl2eth">
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<term><command>idl2eth</command></term>
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<listitem>
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<para>takes a user specified CORBA
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IDL file and generates <quote>C</quote> source code that
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can be used to create an <application>Ethereal</application> plugin.</para>
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<indexterm zone="ethereal idl2eth">
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<primary sortas="b-idl2eth">idl2eth</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="mergecap">
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<term><command>mergecap</command></term>
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<listitem>
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<para>combines multiple saved capture files into a single output
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file.</para>
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<indexterm zone="ethereal mergecap">
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<primary sortas="b-mergecap">mergecap</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="randpkt">
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<term><command>randpkt</command></term>
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<listitem>
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<para>creates random-packet capture files.</para>
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<indexterm zone="ethereal randpkt">
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<primary sortas="b-randpkt">randpkt</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="tethereal">
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<term><command>tethereal</command></term>
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<listitem>
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<para>is a TTY-mode network protocol analyzer.
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It lets you capture packet data from a live network or read packets from a
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previously saved capture file.</para>
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<indexterm zone="ethereal tethereal">
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<primary sortas="b-tethereal">tethereal</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="text2pcap">
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<term><command>text2pcap</command></term>
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<listitem>
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<para>reads in an ASCII hex dump and writes the
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data described into a <application>libpcap</application>-style capture
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file.</para>
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<indexterm zone="ethereal text2pcap">
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<primary sortas="b-text2pcap">text2pcap</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libethereal">
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<term><filename class='libraryfile'>libethereal.so</filename></term>
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<listitem>
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<para>contains functions used by the
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<application>Ethereal</application> programs to perform filtering and
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packet capturing.</para>
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<indexterm zone="ethereal libethereal">
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<primary sortas="c-libethereal">libethereal.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libwiretap">
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<term><filename class='libraryfile'>libwiretap.so</filename></term>
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<listitem>
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<para>is a library being developed as a future replacement for
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<filename class='libraryfile'>libpcap</filename>, the current standard Unix
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library for packet capturing. For more information, see the
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<filename>README</filename> file in the source
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<filename class='directory'>wiretap</filename> directory.</para>
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<indexterm zone="ethereal libwiretap">
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<primary sortas="c-libwiretap">libwiretap.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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