Linux iptables part I: basic rules
Most modern Linux distributions come with a firewall package already active. Since it’s often set in an ‘allow-all’ mode, people are often unaware of it. Meet iptables, a basic yet powerful stateful firewall. You can see a default ‘allow-all’ policy above. Note that there are three different chains: INPUT, FORWARD and OUTPUT. Traffic can only match […]
Source: Linux iptables part I: basic rules (https://reggle.wordpress.com/2015/07/12/linux-iptables-part-i-basic-rules/)
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