centos7下部署iptables環境紀錄（關閉默認的firewalle）

 

CentOS7默認的防火牆不是iptables,而是firewall.
因爲習慣了用iptables做爲防火牆，因此在安裝好centos7系統後，會將默認的firewall關閉，並另安裝iptables進行防火牆規則設定

下面介紹centos7關閉firewall安裝iptables，而且開啓80端口、3306端口的操做記錄：
[root@localhost ~]# cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)

一、關閉firewall：

[root@localhost ~]# systemctl stop firewalld.service            //中止firewall
[root@localhost ~]# systemctl disable firewalld.service        //禁止firewall開機啓動

二、安裝iptables防火牆

[root@localhost ~]# yum install iptables-services            //安裝
[root@localhost ~]# vim /etc/sysconfig/iptables              //編輯防火牆配置文件
# 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                  //最後重啓防火牆使配置生效
[root@localhost ~]# systemctl enable iptables.service                  //設置防火牆開機啓動

[root@localhost ~]# iptables -L                 //查看防火牆規則,默認的是－t filter，若是是nat表查看，即iptables －t nat -L

2、關閉SELINUX

[root@localhost ~]# vim /etc/selinux/config
#SELINUX=enforcing           //註釋掉
#SELINUXTYPE=targeted           //註釋掉
SELINUX=disabled              //增長


[root@localhost ~]# setenforce 0       //使配置當即生效