$3$ A set of firewall rules that includes both the type and filtering point. Hint: one word. $(5)$

$4$ A tool that probes a system for open network ports. Hint: two words. $(4,7)$

$6$ The action to be taken when a rule is matched. Hint: one word. $(6)$

$7$ A front$-$end utility designed to make the process of configuring firewalls with iptables easier. Hint: an acronym. $(3)$

$9$ The target to use when no rule in a chain is matched. Hint: three words. $(7,5,6)$

$10$ also called reconnaissance; the process of discovering information about a network or system with the intent to use this information to compromise security measures. Hint: one word. $(12)$

$12$ A firewall feature that modifies a network packet. Hint: one word. $(6)$

$13$ A system that forwards network packets between networks. Hint: one word. $(6)$

Down

$1$ A tool that displays locaifnetwork traffic. Hint: two words. $(6,7)$

$2$ Part of a network connection between two systems, associated with a specific network port. Hint: one word. $(6)$

$5$ A type of firewall rull, such as filter, nat, or mangle. Hint: one word. $(5)$

$8$ A component of a firewall where rules are placed. Hint: two words. $(9,5)$

$11$ An IPv$4$ feature that allows for a host with an Internet$-$accessible IP address to provide access to multiple hosts with internal, private

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