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<p>Yes, you can just add it.<br>
</p>
<p>Bob VE3TOK<br>
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<div class="moz-cite-prefix">On 2016-08-11 05:39 PM, kd6oat wrote:<br>
</div>
<blockquote
cite="mid:CAMoyDj=RnOt-cXn4eUgN9tVXsrxa0RHNSAPJ9SRv3D9x78h6tg@mail.gmail.com"
type="cite">
<div dir="ltr">Interesting article: <a moz-do-not-send="true"
href="http://thehackernews.com/2016/08/linux-tcp-packet-hacking.html">http://thehackernews.com/2016/08/linux-tcp-packet-hacking.html</a>
<div><br>
</div>
<div>Checked my various linux versions and the /etc/sysctl.conf
files do not have the challenge instruction mentioned. Comment
below article suggests adding the sysctl.conf file if it does
not exist so I imagine adding challenge line to a file that
DOES exist would be in order.</div>
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