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<%
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''获取访问者的地址
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ip=Request.ServerVariables("REMOTE_ADDR")
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''允许的IP地址段为10.0.0.0～10.68.63.255
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allowip1="10.0.0.0"
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allowip2="10.68.10.71"
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response.write checkip(ip,allowip1,allowip2)
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function checkip(ip,allowip1,allowip2)
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dim check(4)
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checkip=false
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ipstr=split(ip,".")
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allow1=split(allowip1,".")
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allow2=split(allowip2,".")
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if cint(allow1(0))>cint(allow2(0)) then ''判断IP地址段是否合法
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response.write "禁止访问"
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exit function
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end if
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for i=0 to ubound(ipstr)
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if cint(allow1(i))<cint(allow2(i)) then
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if cint(allow1(i))=cint(ipstr(i)) then
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check(i)=true
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checkip=true
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exit for
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else
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if cint(ipstr(i))<cint(allow2(i)) then
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check(i)=true
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checkip=true
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exit for
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else
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if cint(ipstr(i))>cint(allow2(i)) then
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check(i)=false
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checkip=false
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exit for
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else
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check(i)=true
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checkip=true
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end if
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end if
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end if
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else
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if cint(allow1(i))>cint(ipstr(i)) or cint(allow1(i))<cint(ipstr(i)) then
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check(i)=false
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checkip=false
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if i<>ubound(ipstr) then
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exit for
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end if
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else
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check(i)=true
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end if
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end if
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next
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if (check(0)=true and check(1)=true and check(2)=true and check(3)=false) and (cint(allow2(2))>cint(ipstr(2))) then
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checkip=true
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end if
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end function
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%>
