RHEL 7.0 修改防火墙配置

RHEL 7.0默认使用的是firewall作为防火墙，这里改为iptables防火墙。

关闭firewall：

systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall开机启动
yum install iptables-services  #安装iptables
vi /etc/sysconfig/iptables  #编辑防火墙配置文件
# 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
:wq! #保存退出

• systemctl  start  iptables.service  #启动防火墙
• systemctl  stop  iptables.service  #停止防火墙
• systemctl  restart  iptables.service  #重启防火墙
• systemctl  status  iptables.service  #查看防火墙状态
• systemctl  enable  iptables.service  #设置开机启动