Use ASP to prohibit the specified IP address and the code that only allows the specified IP address to access the website

1. Disable the specified IP address to prevent website attacks and perform the following operations: Copy codeThe Code is as follows: <%
Dim IP, IPString, VisitIP
'Set IP addresses separated by' |'
IPString = "| 192.168.0.42 | 192.168.0.43 |"
'Get IP Address
IP = Request. ServerVariables ("HTTP_X_FORWARDED_FOR ")
If IP = "" Then
IP = Request. ServerVariables ("REMOTE_ADDR ")
End If
VisitIP = "|" & IP & "|"
If instr (1, IPString, VisitIP)> 0 Then
'The prohibited IP address is allowed to perform the corresponding operation
Response. write "Access prohibited from your IP address"
Response. end
End If
%>

2. modify the code to only allow the specified IP address to defend against website attacks and perform the following operations:Copy codeThe Code is as follows: <%
Dim IP, IPString, VisitIP
'Set IP addresses separated by' |'
IPString = "| 192.168.0.42 | 192.168.0.42 |"
'Get IP Address
IP = Request. ServerVariables ("HTTP_X_FORWARDED_FOR ")
If IP = "" Then
IP = Request. ServerVariables ("REMOTE_ADDR ")
End If
VisitIP = "|" & IP & "|"
If instr (1, IPString, VisitIP)> 0 Then
'Operation is performed on the correct IP address.
Response. write your IP address can access"
Else
'The non-conforming IP address performs the corresponding operation
Response. write "Access prohibited from your IP address"
Response. end
End If
%>

Iii. Usage in practical application:
Save the above Code as an IP. asp file, and then add the following code to the asp program page using the following method:
<! -- # Include file = "IP. asp" -->