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Linux Red hat/CentOS7关闭防火墙

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# 查看防火状态
# CentOS7
systemctl status firewalld
# Red hat
service iptables status

# 暂时关闭防火墙
# CentOS7
systemctl stop firewalld
# Red hat
service iptables stop

# 重启防火墙
# CentOS7
systemctl enable firewalld
# Red hat
service iptables restart

# 永久关闭防火墙
# CentOS7
systemctl disable firewalld
# Red hat
chkconfig iptables off