medium10 pts · first answer countslinuxfirewallnetworking

Accept rule that never matches

Port 8443 is still blocked after you added the rule below. Why?

$ iptables -L INPUT -n --line-numbers
1  ACCEPT  tcp  --  0.0.0.0/0  0.0.0.0/0  tcp dpt:22
2  DROP    all  --  0.0.0.0/0  0.0.0.0/0
3  ACCEPT  tcp  --  0.0.0.0/0  0.0.0.0/0  tcp dpt:8443

A.iptables needs a reboot before new rules applyB.ACCEPT rules only work for ports below 1024C.Rules match in order; rule 2 drops it firstD.Rule 3 needs to name the interface to be valid

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Accept rule that never matches

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