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<td width="30%">'''iptables -A INPUT -p tcp --sport 80 -j ACCEPT'''</td><td>Append policy to <u>bottom </u> of INPUT chain to accept all tcp packets from port 80</td>
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<td>'''iptables -A OUTPUT -p tcp --dport 80 -j ACCEPT'''</td><td>Append policy to <u>bottom </u> of OUTPUT chain to accept all tcp packets to port 80</td>
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<td>'''iptables -I INPUT -p tcp --sport 22 -j LOG'''</td><td>Insert policy at '''top ''' of INPUT chain to log all tcp packets from port 22</td>
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<td>'''iptables -I INPUT 3 -p tcp --dport 22 -j LOG'''</td><td>Insert policy <u>before line 3 </u> of INPUT chain to log all tcp packets from port 22</td>
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