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modbot html
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<!DOCTYPE html>
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<html>
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<head>
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<title>IRC Moderation</title>
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<style type="text/css">
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body {
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max-width: 40em;
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}
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pre {
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background-color: silver;
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border: solid black 3px;
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}
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</style>
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</head>
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<body>
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<h1>IRC Moderation</h1>
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<p>
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Due to the unexpected popularity of this event,
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and in order to accomodate all of our registrants,
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we have set the channel <samp>#netarch</samp> to "moderated mode".
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This means that,
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unlike a normal IRC channel,
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only the instructors will be able to broadcast messages.
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Questions will be gathered by our Tracer Fire Moderation Fairy,
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and answered in the channel as the instructors are able.
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</p>
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<h2>How to ask questions</h2>
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<p>
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If you are in the Network Archaeology course as an auditor,
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you will not be able to ask questions of your own.
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General, unrestricted chat is available in the <samp>#tf5</samp> channel,
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however, and you may find someone in your course who is able to help you.
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</p>
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<p>
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If you qualified to participate fully in Network Archaeology,
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you will have recieved a token from the Tracer Fire Registration Fairy.
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Present this token to <samp>netarch-moderator</samp> to place your question in the queue.
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</p>
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<p>
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For example, if your token is <samp>39AF2B83</samp>
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and you would like to know how to determine which version of
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Python you have installed, you would type:
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</p>
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<pre>/msg netarch-moderator 39AF2B83 How can I find my Python version?</pre>
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<p>
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<samp>netarch-moderator</samp> will reply with a message indicating success,
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and the current length of the question queue.
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<b>If you do not recieve a reply from <samp>netarch-moderator</samp>,
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your token was not recognized as valid.</b>
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</p>
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<p>
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If you are having trouble,
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you can ask for help in <samp>#tf5</samp>.
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But <b>do not give anyone else your token</b>,
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or they could use it to impersonate you and get you blocked
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from asking further questions!
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</p>
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<h2>Rationale</h2>
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<p>
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It costs us nothing to allow people to audit:
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we pay no money for the IRC network,
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the YouTube video hosting,
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or the web server
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(generously donated by <a href="http://linode.com/">Linode</a>).
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But even after restricting active participation to US Government and Critical Infrastructure,
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we still had over 100 participants in the Network Archaeology course.
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In order to present a readable flow of questions and answers in the channel,
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we chose to implement this moderation process.
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</p>
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<p>
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We would have liked to make the moderator reply with helpful usage information
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if your token was invalid or if you asked it for help.
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But the IRC servers limit how many lines any connected client can send in a period of time,
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and disconnect any clients that are sending too much text too quickly.
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This is done to prevent people spamming IRC users or channels.
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If the moderation bot responded to every message it got,
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it would be easy for 5 people to send it messages as quickly as they could,
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and cause the bot to trigger the server's disconnection with too many replies.
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This sort of situation, where several computers "gang up" on a server
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to prevent it having enough resources to respond to anyone else,
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is called a "Distributed Denial of Service Attack" or a DDoS.
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</p>
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<p>
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In order to make the moderation bot more resilient to DDoS attacks,
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we realized we had to program it to only respond to properly-crafted
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questions with tokens on an approved list.
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This web page is our attempt to mitigate the diminished user-friendliness
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that results from this design decision.
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</p>
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</body>
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</html>
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