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	<title>Amephist &#187; One-Liners</title>
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	<description>Lolcahost weirdness</description>
	<lastBuildDate>Thu, 19 Aug 2010 15:04:23 +0000</lastBuildDate>
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		<title>Bloqueo de proxy TOR (The Onion Router)</title>
		<link>http://amephist.com/2010/08/bloqueo-de-proxy-tor-the-onion-router/</link>
		<comments>http://amephist.com/2010/08/bloqueo-de-proxy-tor-the-onion-router/#comments</comments>
		<pubDate>Thu, 19 Aug 2010 15:03:24 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[One-Liners]]></category>
		<category><![CDATA[iptables]]></category>
		<category><![CDATA[one-liner]]></category>
		<category><![CDATA[TOR]]></category>

		<guid isPermaLink="false">http://amephist.com/?p=44</guid>
		<description><![CDATA[Lamentablemente a veces a buenos projectos como es TOR se los usa para fines ilegales. En estos casos a pesar que apoyo la libertad personal y el anonimato en internet, tambien tengo que proteger los intereses de la empresa para la cual trabajo y no puedo permitir que bajo tal anonimato se cometan estafas. Es [...]]]></description>
			<content:encoded><![CDATA[<p>Lamentablemente a veces a buenos projectos como es <a href="https://www.torproject.org/">TOR</a> se los usa para fines ilegales. En estos casos a pesar que apoyo la libertad personal y el anonimato en internet, tambien tengo que proteger los intereses de la empresa para la cual trabajo y no puedo permitir que bajo tal anonimato se cometan estafas. Es por esto que no tuve más opción que bloquear todos los nodos que se encontraban publicados (me quedaron algunos afuera pero paró completamente el ataque).</p>
<p><code class="prettyprint">curl -s -S "https://check.torproject.org/cgi-bin/TorBulkExitList.py?ip=200.40.0.83" | egrep -v '^\#' | sort | uniq | xargs -r -I {} iptables -I INPUT -s {} -j DROP; iptables -L -n | egrep '^DROP.*all.*\-\-' | awk '{ print $4 }' | sort | uniq -c | egrep -v '^.*1 ' | awk '{ print $2 }' | xargs -r -I {} iptables -D INPUT -s {} -j DROP<br />
</code></p>
<p>Como lo comencé a usar bastante, publico y comparto por si alguien requiere tomar las mismas medidas. Funciona en un CentOS bastante de fabrica con iptables.</p>


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		<title>Uso de ancho de banda desde la consola</title>
		<link>http://amephist.com/2010/06/uso-de-ancho-de-banda-desde-la-consola/</link>
		<comments>http://amephist.com/2010/06/uso-de-ancho-de-banda-desde-la-consola/#comments</comments>
		<pubDate>Tue, 01 Jun 2010 15:16:35 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[One-Liners]]></category>
		<category><![CDATA[bandwidth monitor]]></category>
		<category><![CDATA[one-liner]]></category>

		<guid isPermaLink="false">http://amephist.com/?p=9</guid>
		<description><![CDATA[A veces quisiera tener una herramienta para chequear cuanto ancho de banda envia/recibe nuestro servidor pero slurm o vnstat no es una opción. A veces solo necesitamos un one-liner que haga rapidamente este trabajo y mantenerlo de fondo mientras hacemos algunos cambios. Bueno, como ultimamente he comenzado a utilizar mucho este script tal vez te [...]]]></description>
			<content:encoded><![CDATA[<p>A veces quisiera tener una herramienta para chequear cuanto ancho de banda envia/recibe nuestro servidor pero slurm o vnstat no es una opción. A veces solo necesitamos un one-liner que haga rapidamente este trabajo y mantenerlo de fondo mientras hacemos algunos cambios. Bueno, como ultimamente he comenzado a utilizar mucho este script tal vez te ayude a ti tambien.</p>
<p><code class="prettyprint">i=eth0;ltb=1;lrb=1;while :; do b=$(ifconfig $i | awk '/RX bytes/ {print $2 ":" $6}' | cut -d \: -f "2 4" | awk -F\: '{ printf("%d|%d",$1,$2)}');set - $(IFS="|"; echo $b);rb="$1";tb="$2";echo "Received:" $((($rb - $lrb) / 10240)) "kB/s Transmitted:" $((($tb - $ltb) / 10240)) "kB/s";ltb=$tb;lrb=$rb;sleep 10;done</code></p>
<p>Solo cambien la variable i=eth0 por la interfaz que quieran supervisar. Fue probado en Debian y CentOS, debería funcionar en la mayoría de las distribuciones de Linux.</p>


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