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::# '''Incoming data that's a response to a request''': the web page that the server sent back in the diagram above.
::::We normally don't want to do anything special for the response. It is safe to assume that '''a connection that was allowed to be established should be allowed to receive a response'''. This is accomplished with the following INPUT chain rule that should be there by default on your machines:<br><br>
::::<pre>ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED</pre>
::* Rules are applied to: '''chains''' (e.g. ''input/output''), '''protocols''' (e.g. ''tcp/udp/icmp''), and '''ports''' (e.g. ''22, 80, 443'').
