CentOS7中关闭firewall,并使用iptables管理防火墙
背景描述
在使用Docker时,启用centos7默认的firewall,启动端口映射时,防火墙规则不生效。docker默认使用了iptables防火墙机制。所以需要关闭firewall使用iptables解决。
1.关闭默认的firewall防火墙
systemctl stop firewalld.service 关闭防火墙 systemctl disable firewalld.service 关闭开机启动
2.开启iptables
yum install iptables (根据centOS7的版本和内核,有些版本已经装过,可以跳过此命令) yum install iptables-services
service iptables restart
chkconfig iptables on或者systemctl enable iptables.service开机自启
3.编辑防火墙文件(开启了21,22,80,3306端口)
vim /etc/sysconfig/iptables # sampleconfiguration for iptables service # # you can edit thismanually or use system-config-firewall # # please do not askus to add additional ports/services to this default configuration *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 21 -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT -A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -j REJECT --reject-with icmp-host-prohibited COMMIT
4.添加防火墙命令
/sbin/iptables -I INPUT -p tcp --dport 80 -j ACCEPT
5.查看本机关于IPTABLES的设置情况
iptables -L -n