Câu 138: XK0-005: CompTIA Linux+

A DevOps engineer needs to allow incoming traffic to ports in the range of 4000 to 5000 on a Linux server. Which of the following commands will enforce this rule?

1. A. iptables -f filter -I INPUT -p tcp --dport 4000:5000 -A ACCEPT
2. B. iptables -t filter -A INPUT -p tcp --dport 4000:5000 -j ACCEPT — đáp án hiện tại
3. C. iptables filter -A INPUT -p tcp --dport 4000:5000 -D ACCEPT
4. D. iptables filter -S INPUT -p tcp --dport 4000:5000 -A ACCEPT