asp检查ip地址是否为私有/内网ip地址源代码。

内网/私有IP地址网段如下，还有127开头的回环地址:

10.0.0.0-10.255.255.255
172.16.0.0—172.31.255.255
192.168.0.0-192.168.255.255

实现代码：

<%function IpToNumber(ip)'IP地址转为数字 arr=split(ip,".") IpToNumber=256*256*256*clng(arr(0))+256*256*clng(arr(1))+256*clng(arr(2))+clng(arr(3))end functionfunction IsPrivateIp(ip)'判断给定的IP地址是否内网/私有ip地址 if instr(ip,"127.")=1 then'回环IP地址 IsPrivateIp=true:exit function end if ABegin=IpToNumber("10.0.0.0"):AEnd=IpToNumber("10.255.255.255")'A类私有IP地址 BBegin=IpToNumber("172.16.0.0"):BEnd=IpToNumber("172.31.255.255")'B类私有IP地址 CBegin=IpToNumber("192.168.0.0"):CEnd=IpToNumber("192.168.255.255")'C类私有IP地址 IpNum=IpToNumber(ip) IsPrivateIp=(ABegin<=IpNum and IpNum<=AEnd) or (BBegin<=IpNum and IpNum<=BEnd) or (CBegin<=IpNum and IpNum<=CEnd)end functionResponse.Write IsPrivateIp("11.255.255.255")&"<br>"'falseResponse.Write IsPrivateIp("182.255.255.255")&"<br>"'falseResponse.Write IsPrivateIp("172.30.255.255")&"<br>"'trueResponse.Write IsPrivateIp("192.168.205.2")&"<br>"'trueResponse.Write IsPrivateIp("127.168.205.2")'true %>