將CentOS7上的防火牆firewalld改成iptab

將CentOS7上的防火牆firewalld改成iptab

默認CentOS7上安裝的防火牆是firewalld。很多從centos6.X切換過來的用戶都不習慣。

我們可以將firewalld改成iptables。操作如下：

1、關閉firewall：

# systemctl stop firewalld.service

# systemctl disable firewalld.service

2、安裝iptables防火牆

# yum install iptables-services

vi /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

#保存退出

# systemctl restart iptables.service #最後重啟防火牆使配置生效

# systemctl enable iptables.service #設置防火牆開機啟動