mirror of
https://github.com/Zeckmathederg/glfs.git
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91d67d789e
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@2753 af4574ff-66df-0310-9fd7-8a98e5e911e0
218 lines
7.9 KiB
XML
218 lines
7.9 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/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 "722a2529c3a19b5b81c825bca444baea">
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<!ENTITY ethereal-size "5.0 MB">
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<!ENTITY ethereal-buildsize "172 MB">
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<!ENTITY ethereal-time "3.09 SBU">
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]>
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<sect1 id="ethereal" xreflabel="Ethereal-ðereal-version;">
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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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<?dbhtml filename="ethereal.html"?>
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<title>Ethereal-ðereal-version;</title>
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<sect2>
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<title>Introduction to <application>Ethereal</application></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.
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<application>Ethereal</application> provides both <acronym>GUI</acronym> and
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<acronym>TTY</acronym>-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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<sect3><title>Package information</title>
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<itemizedlist spacing="compact">
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<listitem><para>Download (HTTP):
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<ulink url="ðereal-download-http;"/></para></listitem>
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<listitem><para>Download (FTP):
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<ulink url="ðereal-download-ftp;"/></para></listitem>
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<listitem><para>MD5 Sum: ðereal-md5sum;</para></listitem>
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<listitem><para>Download size: ðereal-size;</para></listitem>
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<listitem><para>Estimated Disk space required:
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ðereal-buildsize;</para></listitem>
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<listitem><para>Estimated build time:
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ðereal-time;</para></listitem></itemizedlist>
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</sect3>
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<sect3><title><application>Ethereal</application> dependencies</title>
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<sect4><title>Recommended</title>
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<para><xref linkend="libpcap"/> (required to capture data)</para>
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</sect4>
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<sect4><title>Optional</title>
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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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<acronym>GUI</acronym> front-end),
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<xref linkend="GLib"/> or <xref linkend="GLib2"/> (to build the
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<acronym>TTY</acronym>-mode front-end only),
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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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<ulink url="http://www.net-snmp.org/">Net-SNMP</ulink>,
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<ulink url="http://www.gnu.org/software/adns/adns.html">adns</ulink> and
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<ulink url="http://www.stack.nl/~dimitri/doxygen/">doxygen</ulink></para>
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</sect4>
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</sect3>
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</sect2>
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<sect2>
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<title>Installation of <application>Ethereal</application></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><command>./configure --prefix=/usr --sysconfdir=/etc \
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--enable-randpkt --enable-threads &&
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make &&
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make install</command></userinput></screen>
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</sect2>
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<sect2>
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<title>Command explanations</title>
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<para><option>--enable-randpkt</option>: Adding this parameter will
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build the random capture program.</para>
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<para><option>--enable-threads</option>: Adding this parameter enables the use
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of threads in <command>ethereal</command>.</para>
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</sect2>
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<sect2>
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<title>Configuring <application>Ethereal</application></title>
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<sect3><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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</sect3>
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<sect3><title>Configuration Information</title>
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<sect4><title>Package configuration</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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<acronym>GUI</acronym> interface.</para>
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</sect4>
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<sect4><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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<para>If you plan on filtering captured packets (to eliminate them from being
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captured), a substantial performance increase can be achieved by letting the
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kernel do the filtering. Kernel filtering results in desired packets being
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dropped before being handed to userspace programs. To enable kernel filtering,
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you must enable the <quote>Network packet filtering</quote> and
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<quote><acronym>IP</acronym> tables support</quote> options in the
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<quote>Device Drivers</quote> – <quote>Networking support</quote> –
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<quote>Network packet filtering</quote> section. In addition, you'll need to
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install and configure <xref linkend="postlfs-security-iptables"/>.</para>
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</sect4>
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</sect3>
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</sect2>
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<sect2>
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<title>Contents</title>
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<para>The <application>Ethereal</application> package contains
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<command>capinfo</command>,
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<command>dftest</command>,
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<command>editcap</command>,
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<command>ethereal</command>,
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<command>idl2eth</command>,
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<command>mergecap</command>,
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<command>randpkt</command>,
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<command>tethereal</command>,
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<command>text2pcap</command>,
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<filename class='libraryfile'>libethereal</filename>,
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<filename class='libraryfile'>libwiretap</filename> and
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many dissector plugin modules.</para>
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</sect2>
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<sect2><title>Description</title>
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<sect3><title>capinfo</title>
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<para><command>capinfo</command> reads a saved capture file and returns any or
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all of several statistics about that file. It is able to detect and read any
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capture supported by the <application>Ethereal</application> package.</para>
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</sect3>
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<sect3><title>dftest</title>
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<para><command>dftest</command> is a display-filter-compiler test
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program.</para>
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</sect3>
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<sect3><title>editcap</title>
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<para><command>editcap</command> edits and/or translates the format of capture
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files. It knows how to read <application>libpcap</application> capture files,
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including those of <command>tcpdump</command>,
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<application>Ethereal</application> and other tools that write captures in that
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format.</para>
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</sect3>
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<sect3><title>ethereal</title>
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<para><command>ethereal</command> is a <acronym>GUI</acronym> network protocol
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analyzer. It lets you interactively browse packet data from a live network or
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from a previously saved capture file.</para>
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</sect3>
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<sect3><title>idl2eth</title>
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<para><command>idl2eth</command> takes a user specified
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<acronym>CORBA</acronym> <acronym>IDL</acronym> file and generates
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<quote>C</quote> source code that can be used to create an
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<application>Ethereal</application> plugin.</para>
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</sect3>
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<sect3><title>mergecap</title>
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<para><command>mergecap</command> combines multiple saved capture files into a
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single output file.</para>
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</sect3>
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<sect3><title>randpkt</title>
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<para><command>randpkt</command> creates random-packet capture files.</para>
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</sect3>
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<sect3><title>tethereal</title>
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<para><command>tethereal</command> is a <acronym>TTY</acronym>-mode network
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protocol analyzer. It lets you capture packet data from a live network or
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read packets from a previously saved capture file.</para>
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</sect3>
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<sect3><title>text2pcap</title>
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<para><command>text2pcap</command> reads in an <acronym>ASCII</acronym> hex
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dump and writes the data described into a
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<application>libpcap</application>-style capture file.</para>
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</sect3>
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</sect2>
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</sect1>
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