CentOS 7.0关闭默认防火墙启用iptables防火墙

原创
2017/02/22 15:35
阅读数 271

1、关闭firewall:
[root@localhost ~]# systemctl stop firewalld.service            #停止firewall
[root@localhost ~]# systemctl disable firewalld.service        #禁止firewall开机启动


2、安装iptables防火墙
[root@localhost ~]# yum install iptables-services            #安装
[root@localhost ~]# 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 -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

[root@localhost ~]# systemctl restart iptables.service                  #最后重启防火墙使配置生效
[root@localhost ~]# systemctl enable iptables.service                  #设置防火墙开机启动

[root@localhost ~]# iptables -L                 #查看防火墙规则,默认的是-t filter,如果是nat表查看,即iptables -t nat -L


二、关闭SELINUX
[root@localhost ~]# vim /etc/selinux/config
#SELINUX=enforcing           #注释掉
#SELINUXTYPE=targeted           #注释掉
SELINUX=disabled              #增加


[root@localhost ~]# setenforce 0       #使配置立即生效

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