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When using iptables, the '''Filter''' table is important because it contains the following essential '''chains''':<br><br>
<table border="1" cellpadding="5">
<tr>
<td>x</td>
<td>x</td>
</tr>
</table>
*'''INPUT:''' Packets are checked against the INPUT chain to see if it is '''allowed into''' the PC<br><br>
*'''OUTPUT:''' Packets are checked against the OUTPUT chain to see if it is <u>allowed to go outside</u> of the PC<br><br>
