ASP代码中如何屏蔽ip地址

经常有些地方性的B2B或者B2C网站到处都被批量发布好多垃圾信息，把我的解决办法分享给大家：

把以下代码加入到你的ASP页面就可以测试到效果了： <%
'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
%>

这样就可以限制网站访问的IP段了，你可以根据地区的IP段来设置。 我就是用这个方法防止外地用户使用流氓软件恶意到我网站发布信息的! ASP限制某段IP地址访问 function IP2Num(sip)

dim str1,str2,str3,str4 dim num IP2Num=0 if isnumeric(left(sip,2)) then str1=left(sip,instr(sip,".")-1) sip=mid(sip,instr(sip,".")+1) str2=left(sip,instr(sip,".")-1) sip=mid(sip,instr(sip,".")+1) str3=left(sip,instr(sip,".")-1) str4=mid(sip,instr(sip,".")+1) num=cint(str1)*256*256*256+cint(str2)*256*256+cint(str3)*256+cint(str4) IP2Num = num end if end function function Num2IP(nip) iip1 = int(nip/256/256/256) iip2 = int((nip-iip1*256*256*256)/256/256) iip3 = int((nip-iip1*256*256*256-iip2*256*256)/256) iip4 = int((nip-iip1*256*256*256-iip2*256*256-iip3*256) mod 256) iip0 = iip1 &"."& iip2 & "." &iip3 &"."& iip4 Num2IP = iip0 end function

userIPnum = IP2Num(Request.ServerVariables("REMOTE_ADDR")) if userIPnum > IP2Num("192.168.0.0") and userIPnum < IP2Num("192.168.0.255") then

response.write ("您的IP被禁止") response.end end if 限制IP地址段访问网站代码(ASP) <%
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.write checkip(ip,allowip1,allowip2)
function checkip(ip,allowip1,allowip2)
dim check(4)
checkip=false
ipstr=split(ip,".")
allow1=split(allowip1,".")
allow2=split(allowip2,".")
if cint(allow1(0))>cint(allow2(0)) then
response.write "你的IP地址被禁用
exit function
end if
for i=0 to ubound(ipstr)
if cint(allow1(i))if cint(allow1(i))=cint(ipstr(i)) then
check(i)=true
checkip=true
exit for
else
if cint(ipstr(i))check(i)=true
checkip=true
exit for
else
if cint(ipstr(i))>cint(allow2(i)) then
check(i)=false
checkip=false
exit for
else
check(i)=true
checkip=true
end if
end if
end if
else
if cint(allow1(i))>cint(ipstr(i)) or cint(allow1(i))check(i)=false
checkip=false
if i<>ubound(ipstr) then
exit for
end if
else
check(i)=true
end if
end if
next
if (check(0)=true and check(1)=true and check(2)=true and check(3)=false) and
(cint(allow2(2))>cint(ipstr(2))) then
checkip=true
end if
end function
%>

ASP版：限制某个地区或某个IP地址访问网站并跳转指定网址 将下面的代码保存为 INDEX.ASP 放到网站根目录下，原网站首页改名为 INDE.HTM XML/HTML代码 <%
Function RegReplace(vStr,vReg,vCode)
Dim Re
Set Re = New RegExp
Re.Pattern = vReg
Re.IgnoreCase = True
Re.Global = True
If Re.Test(vStr) Then
vStr = Re.Replace(vStr,vCode)
End If
RegReplace = vStr
End Function
dim weburl,HostName

dim conna,connstra,dba
dba="useraddress.mdb"
set conna=Server.CreateObject("ADODB.CONNECTION")
connstra="Provider=Microsoft.Jet.OLEDB.4.0;data Source="&Server.MapPath(dba)
conna.open connstra

user_ip = Request.ServerVariables("REMOTE_ADDR") '取得访问者IP
userip_ary=split(user_ip,".")
tmp_userip=userip_ary(0)*256*256*256+userip_ary(1)*256*256+userip_ary(2)*256+userip_ary(
3) ' 按规定转换IP为数字

sql="select count(*) from dv_address where ip1<="&tmp_userip&" and ip2>="&tmp_userip
iCount = conna.Execute(sql)(0)
if iCount=0 then '外地显示内容
response.redirect("inde.htm")
else '北京显示内容
response.redirect("http://北京地区访问跳转的网址")
end if

%> 其中有个 ACCESS 数据库，和 INDEX.ASP 放在同级目录下，全打包下载：禁止ip.rar