Which of the following commands should be run on the DNS forwarder server to accomplish this task?

A Linux administrator has set up a new DNS forwarder and is configuring all internal servers to use the new forwarder to look up external DNS requests. The administrator needs to modify the firewall on the server for the DNS forwarder to allow the internal servers to communicate to it and make the changes persistent between server reboots.

Which of the following commands should be run on the DNS forwarder server to accomplish this task?
A . ufw allow out dns
B. systemctl reload firewalld
C. iptables -A OUTPUT -p udp -ra udp -dport 53 -j ACCEPT
D. flrewall-cmd –zone-public –add-port-53/udp –permanent

View Answer

Answer: D