Asp限制IP访问 阻止某一个IP段禁止访问本站的代码

复制代码 代码如下:

  <%

  ''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

  %>

  把以下代码加入到你的ASP页面就可以测试到效果了:

  

复制代码 代码如下:

  <%

  '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!