Centos防火牆添加IP白名單

Centos iptables防火牆添加IP白名單，指定IP可訪問端口

vi /etc/sysconfig/iptables

以下為我虛擬機的防火牆為例（Centos 7）

# 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 xx.xx.xx.xx/32 -j ACCEPT　　　　##添加IP到白名單

-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j whitelist　　　　##whitelist調用白名單IP列表，22端口只允許白名單IP使用
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT　　　　　　##無調用白名單，外網可訪問
-A INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
~                

:wq   保存，重啟防火牆生效