linux firewall Posted on 2021-04-08 | In PRODUCT 리눅스 방화벽 특정 IP 모든 포트 오픈 Whitelist a specific IP which grants access to any port OS : RHEL 7.x, CentOS7.x 1$ firewalld-cmd --permanant --zone=public --add-rich-rule='rule family="ipv4" source address="xx.xx.xx" accept'