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<!DOCTYPE html>
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<title>Netbeacon by adulau</title>
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<body>
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<div id="container">
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<div class="inner">
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<header>
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<h1>Netbeacon</h1>
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<h2>netbeacon - monitoring your network capture, NIDS or network analysis process</h2>
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</header>
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<section id="downloads" class="clearfix">
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<a href="https://github.com/adulau/netbeacon/zipball/master" id="download-zip" class="button"><span>Download .zip</span></a>
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<a href="https://github.com/adulau/netbeacon/tarball/master" id="download-tar-gz" class="button"><span>Download .tar.gz</span></a>
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<a href="https://github.com/adulau/netbeacon" id="view-on-github" class="button"><span>View on GitHub</span></a>
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</section>
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<hr>
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<section id="main_content">
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<h1>
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<a name="netbeacon---monitoring-your-network-capture" class="anchor" href="#netbeacon---monitoring-your-network-capture"><span class="octicon octicon-link"></span></a>netbeacon - monitoring your network capture</h1>
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<p>netbeacon is a set of free software tools to send beacons over
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the network to test the accuracy and the precision of your network
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capture framework. With netbeacon you can test the following properties
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of your network capture (e.g. for honeypot packet data capture,
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data interception devices, NIDS, DPI ...):</p>
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<ul>
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<li>How long it takes for a packet to reach your monitoring.</li>
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<li>Time inconsistencies between devices.</li>
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<li>Finding missing packets or its (re)ordering.</li>
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<li>Watchdog to verify an operational network capture.</li>
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</ul><h2>
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<a name="netbeacon---packet-format" class="anchor" href="#netbeacon---packet-format"><span class="octicon octicon-link"></span></a>netbeacon - packet format</h2>
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<p>The netbeacon format is a simple ASCII format encapsulated in an UDP
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packet. The format is the following:</p>
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<pre><code>header;epoch;sequence;hmac
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</code></pre>
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<ul>
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<li>The current header is nb</li>
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<li>The epoch value (in UTC format)</li>
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<li>The sequence an unsigned integer</li>
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<li>and the HMAC-SHA1 signature.</li>
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</ul><p>Each message is encapsulated in UDP and by default using port 12345.</p>
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<p>A pre-shared key (PSK) is agreed between the netbeacon sender
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and netbeacon recipient to ensure packet integrity using HMAC (SHA1).
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There is a default key "netbeacon" but we highly recommend to set your
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own for your systems.</p>
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<h3>
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<a name="sample-netbeacon-messages" class="anchor" href="#sample-netbeacon-messages"><span class="octicon octicon-link"></span></a>sample netbeacon messages</h3>
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<p>Here is a serie of 3 netbeacon messages extracted from 3 UDP packets:</p>
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<pre><code> nb;1354960619;101;335540bf3dae684c3d5cd5795fd09b9097bad656
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nb;1354960619;102;56fc82c066644f179b58eb84a47e577bf92adc47
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nb;1354960619;103;854207f54c1c4be97bdf4cd4a0d1068731848698
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</code></pre>
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<h2>
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<a name="netbeacon---usage" class="anchor" href="#netbeacon---usage"><span class="octicon octicon-link"></span></a>netbeacon - usage</h2>
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<h3>
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<a name="how-to-use-it" class="anchor" href="#how-to-use-it"><span class="octicon octicon-link"></span></a>How to use it?</h3>
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<p>On a device where you able to send packets on the monitored/tapped network, you
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can send beacons using nb_send.py</p>
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<pre><code>python nb_send.py -s -i 3 -d 1.2.3.4
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</code></pre>
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<p>Where you are processing your network capture, you can run the following:</p>
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<pre><code>python nb_collect.py -i dag0 | python nb_verify.py -s -t
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</code></pre>
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<h3>
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<a name="nb_sendpy" class="anchor" href="#nb_sendpy"><span class="octicon octicon-link"></span></a>nb_send.py</h3>
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<pre><code> Usage: nb_send.py [options]
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Options:
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-h, --help show this help message and exit
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-p PSK, --psk=PSK pre-shared key used by the HMAC-SHA1 (default:
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netbeacon)
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-s, --storeseq store sequence and validate sequence
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-i ITERATION, --iteration=ITERATION
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set the number of interation for sending the netbeacon
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-d DESTINATION, --destination=DESTINATION
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set the destination(s) IPv4 address (default: 127.0.0.1)
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-v, --verbose output netbeacon sent
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</code></pre>
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<h3>
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<a name="nb_collectpy" class="anchor" href="#nb_collectpy"><span class="octicon octicon-link"></span></a>nb_collect.py</h3>
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<pre><code> Usage: nb_collect.py [options]
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Options:
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-h, --help show this help message and exit
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-i INTERFACE, --interface=INTERFACE
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live capture on interface (default:lo)
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-r FILEDUMP, --read=FILEDUMP
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read pcap file
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-e EXTENDED, --extended=EXTENDED
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enable extended format including pcap timestamp
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</code></pre>
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<h3>
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<a name="nb_verifypy" class="anchor" href="#nb_verifypy"><span class="octicon octicon-link"></span></a>nb_verify.py</h3>
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<pre><code> Usage: nb_verify.py [options] <netbeacon messages>
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Options:
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-h, --help show this help message and exit
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-t, --timedelta show timedelta
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-s, --storeseq store sequence and validate sequence
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-p PSK, --psk=PSK pre-shared key used by the HMAC-SHA1 (default: netbeacon)
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</code></pre>
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<h1>
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<a name="license" class="anchor" href="#license"><span class="octicon octicon-link"></span></a>License</h1>
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<p>netbeacon is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.</p>
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<p>Copyright (c) 2012,2013 Alexandre Dulaunoy - <a href="https://github.com/adulau/">https://github.com/adulau/</a></p>
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</section>
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<footer>
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Netbeacon is maintained by <a href="https://github.com/adulau">adulau</a><br>
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This page was generated by <a href="http://pages.github.com">GitHub Pages</a>. Tactile theme by <a href="https://twitter.com/jasonlong">Jason Long</a>.
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