How to block user-agents in Plesk Control Panel on Windows?

[Suhitha]

Question
How to block user-agents in Plesk Control Panel on Windows?
Answer
Choose a method that suites you most:


                  Using Filtering Rules on IIS

• To block these agents on IIS use the following steps:
• Open the IIS Manager
• Navigate to the level that you want to block the request (use the top level to apply it to the entire server)
• Click on Request Filtering (in IIS part)
• Click on the Filters Tab, then click on Add filtering rule... in the Action panel on the right
• Configure the tab as follows:
•     Define a name for the rule, in this example is "user-agent"
•     In the Scan Header field, add the value "user-agent"
•     In the Deny Strings field, add the values of the user-agents that must be blocked, one per line. In the example, is blocking the user-agents "hello" and "world"
• You should add closer to this:
• 
• Press OK and make a non-redirect following query with a specified user agent. Now it will return 404:
• Add the following configuration (where hello, world and helloworld are case-insensitive:

# curl -Ik 10.69.45.153:8880 -A hello
HTTP/1.1 404 Not Found
Content-Length: 929
Content-Type: text/html
Server: Microsoft-IIS/10.0
X-Powered-By: ASP.NET
X-Content-Type-Options: nosniff
Date: Tue, 25 Mar 2025 14:47:08 GMT
Connection: close