In IIS, I used the URL Rewrite to create a rule that redirects my two sites (site1.domain.com) back to my domain should an attacker attempt to direct users to a false site using my domain name. Under local host, I have Default Web Site, Home, Mysite, and SharePoint Web Services. The rules are created under Home and Mysite. However, my vulnerability assessment server is still populating the vulnerability in this configuration. When I place the rule at the top under local host, the vulnerability is removed, but none of the users can access the sites. I’m assuming that I need to place a rule under the default web site and sharepoint web services, but the bindings are not using a domain name. They are using local host and a port. Can anyone tell me what the rule would look like to protect local host from host header vulnerabilities.
I have tried placing the rule under the local host, however users are unable to access the sites when the rule is enabled.
If you want useful advice, please provide detailed and specific information.
I roughly see what you mean. The "Request Blocking" rule template can be used to generate a rule that blocks incoming requests based on various criteria. Requests can be blocked based on certain pattern within URL path or based on certain value in one of the request headers. For detailed steps, you can refer to the official document: https://learn.microsoft.com/en-us/iis/extensions/url-rewrite-module/request-blocking-rule-template.