방화벽 추가

firewall-cmd --permanent --zone=public --add-port=80/tcp

firewall-cmd --permanent --zone=public --add-port=8080/tcp

 firewall-cmd --permanent --zone=public --add-port=21/tcp

방화벽 확인

cat /etc/firewalld/zones/public.xml

방화벽 재시작

systemctl restart firewalld