Asp限制IP访问 阻止某一个IP段禁止访问本站的代码

<% 
''获取访问者的地址 
ip=Request.ServerVariables("REMOTE_ADDR") 
''允许的IP地址段为10.0.0.0～10.68.63.255 
allowip1="10.0.0.0" 
allowip2="10.68.10.71" 
response.writecheckip(ip,allowip1,allowip2) 
functioncheckip(ip,allowip1,allowip2) 
dimcheck(4) 
checkip=false 
ipstr=split(ip,".") 
allow1=split(allowip1,".") 
allow2=split(allowip2,".") 
ifcint(allow1(0))>cint(allow2(0))then''判断IP地址段是否合法 
response.write"禁止访问" 
exitfunction 
endif 
fori=0toubound(ipstr) 
ifcint(allow1(i))<cint(allow2(i))then 
ifcint(allow1(i))=cint(ipstr(i))then 
check(i)=true 
checkip=true 
exitfor 
else 
ifcint(ipstr(i))<cint(allow2(i))then 
check(i)=true 
checkip=true 
exitfor 
else 
ifcint(ipstr(i))>cint(allow2(i))then 
check(i)=false 
checkip=false 
exitfor 
else 
check(i)=true 
checkip=true 
endif 
endif 
endif 
else 
ifcint(allow1(i))>cint(ipstr(i))orcint(allow1(i))<cint(ipstr(i))then 
check(i)=false 
checkip=false 
ifi<>ubound(ipstr)then 
exitfor 
endif 
else 
check(i)=true 
endif 
endif 
next 
if(check(0)=trueandcheck(1)=trueandcheck(2)=trueandcheck(3)=false)and(cint(allow2(2))>cint(ipstr(2)))then 
checkip=true 
endif 
endfunction 
%> 

<% 
'受屏蔽IP地址(段)集合，星号为通配符，通常保存于配置文件中。 
Const BadIPGroup = "192.168.1.*|202.68.*.*|*.12.55.34|185.*.96.24|127.*.0.1|192.168.0.1" 
If IsForbidIP(BadIPGroup) = True Then 
Response.Write(GetIP &"IP地址禁止访问") 
Response.End() 
End If 
'参数vBadIP：要屏蔽的IP段,IP地址集合，用|符号分隔多个IP地址(段) 
'返回Bool：True用户IP在被屏蔽范围，False 反之 
Function IsForbidIP(vBadIP) 
Dim counter, arrIPPart, arrBadIP, arrBadIPPart, i, j 
arrBadIP = Split(vBadIP, "|") 
arrIPPart = Split(GetIP(), ".") 
For i = 0 To UBound(arrBadIP) 
counter = 0 
arrBadIPPart = Split(arrBadIP(i), ".") 
For j = 0 To UBound(arrIPPart) 
If(arrBadIPPart(j)) = "*" or Cstr(arrIPPart(j)) = Cstr(arrBadIPPart(j)) Then 
counter = counter + 1 
End If 
Next 
If counter = 4 Then 
IsForbidIP = True 
Exit Function 
End If 
Next 
IsForbidIP = False 
End Function 
''返回客户IP地址 
Function GetIP() 
Dim IP 
IP = Request.ServerVariables("HTTP_X_FORWARDED_FOR") 
If IP = "" Then IP = Request.ServerVariables("REMOTE_ADDR") 
GetIP = IP 
End Function 
%>