一. 安裝前準備

1. 關閉firewall

systemctl stop firewalld.service #停止firewall
systemctl disable firewalld.service #禁止firewall開機啟動

2. 安裝iptables防火牆

yum install iptables-services #安裝

2.1 編輯防火牆配置檔案

vi /etc/sysconfig/iptables # 編輯防火牆配置檔案


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# 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    #新增
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
 
  #新增
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT


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:wq! #儲存退出
systemctl restart iptables.service #最後重啟防火牆使配置生效
systemctl enable iptables.service #設定防火牆開機啟動

3. 關閉SELINUX

vi /etc/selinux/config #編輯config檔案


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#SELINUX=enforcing #註釋掉
#SELINUXTYPE=targeted #註釋掉
SELINUX=disabled #增加


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:wq! #儲存退出
setenforce 0 #使配置立即生效