CentOS如何快速启用iptables防火墙呢?数据安全已是网络时代面对的大难题,而防火墙的搭建,至少是一颗定心丸,让人们有了小小的安全感!下面商城的小编就为您介绍一下:CentOS启用iptables防火墙的小方法!, 一、关闭firewall, 1 //停止firewall, 2 sudo systemctl stop firewalld.service, 3 //禁止firewall开机启动, 4 sudo systemctl disable firewalld.service, 二、当然就是安装iptables防火墙, 1.安装, 1 //安装, 2 sudo yum install iptables-services, 2.配置, //编辑iptables,如果权限不够打开时使用sudo, vi /etc/sysconfig/iptables, //文件内容, # Firewall configuration written by system-config-firewall, # Manual customization of this file is not recommended., *filter, :INPUT ACCEPT [0:0], :FORWARD ACCEPT [0:0], :OUTPUT ACCEPT [0:0], -A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT, -A INPUT -p icmp -j ACCEPT, -A INPUT -i lo -j ACCEPT, -A INPUT -m state –state NEW -m tcp -p tcp –dport 22 -j ACCEPT, -A INPUT -m state –state NEW -m tcp -p tcp –dport 80 -j ACCEPT, -A INPUT -j REJECT –reject-with icmp-host-prohibited, -A FORWARD -j REJECT –reject-with icmp-host-prohibited, COMMIT, //保存文件, C+C 然后:wq退出->由于受emacs的习惯这里的C就代表Ctrl,so C+C其实就是Ctrl+C,以后基本都会那么写,比较方便。, //重启防火墙使配置生效, sudo systemctl restart iptables.service, //设置防火墙开机启动, sudo systemctl enable iptables.service, OK,这时,你的iptables就已经配置好了,如果以后你还想添加端口,那么接着往下看。, 3.开放端口, //里面的*要替换成你要开放的端口号, /sbin/iptables -I INPUT -p tcp –dport * -j ACCEPT, //保存配置, /etc/rc.d/init.d/iptables save, //查看你更改后的iptables, /etc/init.d/iptables status, //重启iptables, sudo service iptables restart, 以上就是商城小编为您带来的CentOS启用iptables防火墙的小妙招!其实,就算你搭建了防火墙,也不能保证万无一失,而定期检查才是王道!,
,