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Q27 Single choice

A Linux engineer needs to block an incoming connection from the IP address 2.2.2.2 to a secure shell server and ensure the originating IP address receives a response that a firewall is blocking the connection.

Which of the following commands can be used to accomplish this task?

A
iptables -A INPUT -p tcp -- dport ssh -s 2.2.2.2 -j DROP
B
iptables -A INPUT -p tcp -- dport ssh -s 2.2.2.2 -j RETURN
C
iptables -A INPUT -p tcp -- dport ssh -s 2.2.2.2 -j REJECT
D
iptables -A INPUT -p tcp -- dport ssh -s 2.2.2.2 -j QUEUE

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