甲骨文开放所有端口 Ubuntu系统##开放所有端口 iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables -F Ubuntu镜像默认设置了Iptable规则，关闭它 apt-get purge netfilter-persistent reboot 或者强制删除 rm -rf /etc/iptables && rebootCentos系统##删除多余附件 systemctl stop oracle-cloud-agent systemctl disable oracle-cloud-agent systemctl stop oracle-cloud-agent-updater systemctl disable oracle-cloud-agent-updater 停止firewall systemctl stop firewalld.service 禁止firewall开机启动 systemctl disable firewalld.service