限制ip访问网站问题

[jeffrey119]

在主页的开始加入如下一段后，但我拿ip是192.168.1.206的机子去访问为什么返回的值是true呢？？求高手


代码如下：


<%
dim ip,allow1,allow2,allowip1,allowip2,ipstr,i

''获取访问者的地址
ip=Request.ServerVariables("REMOTE_ADDR")
''允许的IP地址段为192.168.1.207～192.168.1.255
allowip1="192.168.1.207"
allowip2="192.168.1.255"
response.write checkip(ip,allowip1,allowip2)
function checkip(ip,allowip1,allowip2)
dimcheck(4)
checkip=false
ipstr=split(ip,".")
allow1=split(allowip1,".")
allow2=split(allowip2,".")
if cint(allow1(0))>cint(allow2(0))then''判断IP地址段是否合法
response.write"禁止访问"
exit function
end if
for i=0 to ubound(ipstr)
if cint(allow1(i))<cint(allow2(i)) then
if cint(allow1(i))=cint(ipstr(i)) then
check(i)=true
checkip=true
exit for
else
if cint(ipstr(i))<cint(allow2(i)) then
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))<cint(ipstr(i)) then
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
%>

[jeffrey119]

我在前面加了
dim ip,allow1,allow2,allowip1,allowip2,ipstr,i
就好了，但为什么返回的值是true呢

[Go 旅城通票]

晕。。你转换为数字后在比较不是更加简单？？

function getipnum(ip)
    arr=split(ip,".")
    getipnum=256*256*256*cint(arr(0)) + 256*256*cint(arr(1)) + 256*cint(arr(2)) +cint(arr(3))'转换为数字
end function
function checkip(ip,ip1,ip2)
 ip=getipnum(ip)
 ip1=getipnum(ip1)
 ip2=getipnum(ip2)
 checkip=(ip>=ip1 and ip<=ip2) or (ip>=ip2 and ip<=ip1)
end function

response.write checkip("192.168.1.206","192.168.1.207","192.168.1.255")''''''''