sudo firewall-cmd --permanent --remove-service=ssh #기존 규칙 삭제
sudo firewall-cmd --reload #설정 반영
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="1.9.9.9" port protocol="tcp" port="22" accept'
sudo firewall-cmd --reload #설정 반영
sudo firewall-cmd --list-rich-rules #반영확인