如何允许或者阻止某些ip的访问者？

Format	Sample Output
Apache .htaccess allow	allow from 8.8.8.0/24
Apache .htaccess deny	deny from 8.8.8.0/24
Nginx allow	allow 8.8.8.0/24;
Nginx deny	deny 8.8.8.0/24;
CIDR	8.8.8.0/24
Linux iptables accept	iptables -A INPUT -s 8.8.8.8/24 -j ACCEPT
Linux iptables drop	iptables -A INPUT -s 8.8.8.8/24 -j DROP
Netmask	8.8.8.0/255.255.255.0
Inverse Netmask	8.8.8.0 0.0.0.255
Web.config allow	<ipSecurity allowUnlisted="false"> <add ipAddress="8.8.8.0" subnetMask="255.255.255.0"/>
Web.config deny	<ipSecurity allowUnlisted="true"> <add ipAddress="8.8.8.0" subnetMask="255.255.255.0"/>
Cisco ACL	deny ip 8.8.8.0 0.0.0.255 any
PeerGuardian2	HOST:8.8.8.0-8.255.255.255
network-object	network-object 8.8.8.0 255.255.255.0
Cisco bit bucket	ip route 8.8.8.0 255.255.255.0 Null0
Juniper Junos	set 8.8.8.0/24
MikroTik	add address=8.8.8.0/24 comment="Danger" list=MyList
ConfigServer Firewall (CSF)	8.8.8.0/24

在不同的系统 都可以禁止或者允许某个ip段。保障您的服务器不受黑客的攻击。