Linux下设置防火墙白名单(RHEL 6和CentOS 7)的步骤

进入Linux 命令行,编辑防火墙规则配置文件 iptables
vi /etc/sysconfig/iptables

下面是一个白名单设置的例子:

  # Firewall configuration written by system-config-securitylevel  # Manual customization of this file is not recommended.  *filter  :INPUT ACCEPT [0:0]  :FORWARD ACCEPT [0:0]  :OUTPUT ACCEPT [0:0]  :RH-Firewall-1-INPUT - [0:0]    -N whitelist  -A whitelist -s 10.202.106.1 -j ACCEPT  -A whitelist -s 10.202.106.2 -j ACCEPT  -A whitelist -s 10.202.106.3 -j ACCEPT  -A whitelist -s 10.202.106.4 -j ACCEPT  -A whitelist -s 10.202.106.5 -j ACCEPT  -A whitelist -s 10.202.106.6 -j ACCEPT  -A whitelist -s 10.202.106.7 -j ACCEPT    -A INPUT -j RH-Firewall-1-INPUT  -A FORWARD -j RH-Firewall-1-INPUT  -A RH-Firewall-1-INPUT -i lo -j ACCEPT  -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT  -A RH-Firewall-1-INPUT -p 50 -j ACCEPT  -A RH-Firewall-1-INPUT -p 51 -j ACCEPT  -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT  -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT  -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT  -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT  -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT  -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 4750 -j ACCEPT  -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j whitelist  -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited    COMMIT

其中设置白名单的部分为:

  -N whitelist  -A whitelist -s 10.202.106.1 -j ACCEPT  -A whitelist -s 10.202.106.2 -j ACCEPT  -A whitelist -s 10.202.106.3 -j ACCEPT  -A whitelist -s 10.202.106.4 -j ACCEPT  -A whitelist -s 10.202.106.5 -j ACCEPT  -A whitelist -s 10.202.106.6 -j ACCEPT  -A whitelist -s 10.202.106.7 -j ACCEPT  

使用白名单规则使用 j 参数指定:

  -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j whitelist  

以上这篇Linux下设置防火墙白名单(RHEL 6和CentOS 7)的步骤就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持脚本之家。

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