CentOS 7默认firewall防火墙改为iptables配置IP地址白名单

目前 Linux的 CentOS 7默认一般为 firewall防火墙,但有些朋友可能还是不太习惯,本文就分享一下如何改成原来的 iptables防火墙:

CentOS 7,firewall防火墙,iptables防火墙

1.关闭防火墙:sudo systemctl stop firewalld.service

systemctl start firewalld.service #启动firewall

systemctl stop firewalld.service #停止firewall(选这个停止命令)

systemctl disable firewalld.service #禁止firewall开机启动

2. 关闭开机启动:sudo systemctl disable firewalld.service

3.安装 iptables防火墙命令:sudo yum install iptables-services

4.配置 iptables防火墙 打开指定端口 (可自己网上收集)

5. 设置 iptables防火墙开机启动命令:sudo systemctl enable iptables

6 修改防火墙配置文件 进入服务器 /etc/sysconfig/iptables 编辑 iptables 文件(先备份此文件,不行可以还原)

7. 编辑 iptables配置文件,将文件内容更改为如下,则具备了ip地址白名单功能

#vim /etc/sysconfig/iptables

les

代码如下:

*filter

:INPUT ACCEPT [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

-N whitelist

-A whitelist -s 1.2.3.4/24 -j ACCEPT

-A whitelist -s 2.3.4.5 -j ACCEPT

-A INPUT -m state --state RELATED,ESTABLISHED -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 8080 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

-A INPUT -p icmp -j ACCEPT

-A INPUT -i lo -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited

-A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT

6~8 行是添加白名单列表,可以是 ip段或者单个 ip地址

10~12行 注意的是“-j whitelist”而不是“-j ACCEPT”,前者将该端口访问权限限制在白名单内,后者为不限制

13行 任何 ip地址都能 ping通该主机,因为“-j ACCEPT”没有做相应限制

配置完毕后,运行命令重启防火墙使规则生效

#systemctl restart iptables.service

因为我有的服务器用了 360网站卫士 CDN云防护和百度云 CDN网站,找到对应放行的 IP段如下(可按自己实际需求设置)

代码如下:

# sample configuration for iptables service

# you can edit this manually or use system-config-firewall

# please do not ask us to add additional ports/services to this default configuration

*filter

:INPUT ACCEPT [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

-N whitelist

-A whitelist -s 36.27.212.0/255 -j ACCEPT

-A whitelist -s 123.129.232.0/255 -j ACCEPT

-A whitelist -s 119.188.9.0/24 -j ACCEPT

-A whitelist -s 42.236.93.0/24 -j ACCEPT

-A whitelist -s 220.170.185.0/24 -j ACCEPT

-A whitelist -s 115.231.186.0/25 -j ACCEPT

-A whitelist -s 183.232.51.0/24 -j ACCEPT

-A whitelist -s 61.182.137.0/25 -j ACCEPT

-A whitelist -s 112.25.90.0/24 -j ACCEPT

-A whitelist -s 59.51.81.128/191 -j ACCEPT

-A whitelist -s 222.216.190.0/24 -j ACCEPT

-A whitelist -s 122.190.2.0/24 -j ACCEPT

-A whitelist -s 125.39.239.0/24 -j ACCEPT

-A whitelist -s 183.61.177.0/24 -j ACCEPT

-A whitelist -s 183.61.236.0/24 -j ACCEPT

-A whitelist -s 124.95.168.128/191 -j ACCEPT

-A whitelist -s 124.95.191.0/24 -j ACCEPT

-A whitelist -s 58.211.2.0/24 -j ACCEPT

-A whitelist -s 117.34.13.0/24 -j ACCEPT

-A whitelist -s 150.138.150.0/24 -j ACCEPT

-A whitelist -s 150.138.149.128/25 -j ACCEPT

-A whitelist -s 157.255.25.0/24 -j ACCEPT

-A whitelist -s 113.207.101.0/25 -j ACCEPT

-A whitelist -s 111.32.135.0/25 -j ACCEPT

-A whitelist -s 42.81.6.0/25 -j ACCEPT

-A whitelist -s 115.231.187.148 -j ACCEPT

-A whitelist -s 58.211.137.148 -j ACCEPT

-A whitelist -s 117.34.14.148 -j ACCEPT

-A whitelist -s 125.39.174.148 -j ACCEPT

-A whitelist -s 42.236.94.148 -j ACCEPT

-A whitelist -s 113.207.102.148 -j ACCEPT

-A whitelist -s 122.190.3.148 -j ACCEPT

-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 20 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 21 -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 1521 -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 8080 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 53 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 465 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 110 -j ACCEPT

-A INPUT -p icmp -j ACCEPT

-A INPUT -i lo -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited

-A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT

 

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