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'''Examples:'''
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<td width="30%">'''iptables -P INPUT DROP'''</td><td>Set default policy to drop all incoming connections for ALL protocols, ALL communication ports, ALL IP addresses</td>
'''Examples:'''
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<td width="30%">'''iptables -A INPUT -p tcp --sport 80 -j ACCEPT'''</td><td>Append policy to bottom of INPUT chain to accept all tcp packets from port 80</td>
