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VPS|甲骨文如何正确开放端口

一、进入自己的实例,设置子网

开放所有端口,当然你也可以设置需要开放的端口,我这里是所有开放

二、删除、关闭、打开各自系统的无用附件、防火墙、端口及规则

Ubuntu系统下:

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 && reboot

Centos系统下:

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

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