给我写一段asp防止cc攻击的代码
时间: 2024-05-03 09:23:31 浏览: 98
以下是一种可能的ASP代码,用于防止 CC 攻击:
```asp
<%
'设置防 CC 攻击的参数
maxRequestsPerSecond = 10 '每秒最多允许的请求次数
blockDurationInMinutes = 5 '需屏蔽的时间(分钟)
ipBanList = Server.MapPath("ipBanList.txt") 'IP 黑名单文件路径
'获取客户端 IP 地址
dim clientIP, bannedIPs
clientIP = Request.ServerVariables("REMOTE_ADDR")
'读取 IP 黑名单文件
set fs = Server.CreateObject("Scripting.FileSystemObject")
if fs.FileExists(ipBanList) then
set file = fs.OpenTextFile(ipBanList, 1)
bannedIPs = file.ReadAll
file.Close
else
bannedIPs = ""
end if
'检查客户端 IP 是否在黑名单中
if InStr(bannedIPs, clientIP) > 0 then
'客户端 IP 在黑名单中,拒绝请求
Response.Status = "403 Forbidden"
Response.Write "Your IP address has been banned due to suspicious activity."
Response.End
else
'客户端 IP 不在黑名单中,继续处理请求
'记录客户端请求时间
dim requestTime, requestCount
requestTime = Session("lastRequestTime")
requestCount = Session("requestCount")
if requestTime = "" then
'第一次请求,初始化 Session 变量
requestTime = Now()
requestCount = 1
Session("lastRequestTime") = requestTime
Session("requestCount") = requestCount
else
'非第一次请求,计算请求间隔时间和请求数量
timeDiffInSeconds = DateDiff("s", requestTime, Now())
if timeDiffInSeconds < 1 then timeDiffInSeconds = 1 '避免除数为 0
requestPerSecond = requestCount / timeDiffInSeconds
if requestPerSecond > maxRequestsPerSecond then
'请求过于频繁,需屏蔽客户端 IP
bannedIPs = bannedIPs & clientIP & vbCrLf
Session.Abandon
set file = fs.OpenTextFile(ipBanList, 2, true)
file.WriteLine bannedIPs
file.Close
Response.Status = "403 Forbidden"
Response.Write "Your IP address has been banned due to suspicious activity."
Response.End
else
'请求正常,更新 Session 变量
Session("lastRequestTime") = Now()
Session("requestCount") = requestCount + 1
end if
end if
end if
%>
```
这段代码主要实现了以下功能:
- 读取 IP 黑名单文件,检查客户端 IP 是否在黑名单中;
- 记录客户端请求时间和请求数量;
- 根据最大请求次数限制和请求间隔时间计算请求速率;
- 如果请求过于频繁,将客户端 IP 加入黑名单文件并拒绝请求。
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