centos 7
关闭防火墙:sudo systemctl stop firewalld
开启防火墙:sudo systemctl start firewalld // status 状态 restart 重启
开机自启动:sudo systemctl enable firewalld
开机不启动:sudo systemctl disable firewalld
Ubuntu
首先
sudo apt-get install ufw
关闭防火墙:
sudo ufw disable udo ufw allow 80 允许外部访问80端口
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sudo ufw delete allow 80 禁止外部访问80 端口
sudo ufw allow from 192.168.1.1 允许此IP访问所有的本机端口
sudo ufw deny smtp 禁止外部访问smtp服务
sudo ufw delete allow smtp 删除上面建立的某条规则