How does block work in iptables?

Question

iptables

How does the command work DROPin iptables? If I want to use it to close port 8080 from the outside, but I want to be able to get to it from the inside (from the localhost), then the option iptables -A INPUT -p tcp --dport 8080-j DROPwill work?

Answer 1

In the case when the policy is ACCEPT - yes. But this is not feng shui.
Judging by the question, you do not quite understand how iptables works. Therefore, I suggest reading a short note about this: The minimum set of Iptables rules for typical tasks