Open the Internet Information Services (IIS) Manager.Log in as an administrator on your Windows Server 2012 computer.To configure IIS to deny access based on the number of HTTP requests that it receives, use the following steps: IIS 8.0 can be configured to deny access to websites based on the number of times that an HTTP client accesses the server within a specified time interval, or based on the number of concurrent connections from an HTTP client. There are no known bugs for this feature at this time.Ĭonfiguring IIS to Deny Access based on HTTP Requests The IP and Domain Restrictions feature must be installed as part of IIS. Windows Server 2012 machine with IIS 8.0 installed. IP filtering now feature a proxy mode, which allows IP addresses to be blocked not only by the client IP that is seen by IIS but also by the values that are received in the x-forwarded-for HTTP header.The IP address filtering features now allow administrators to specify the behavior when IIS blocks an IP address, so requests from malicious clients can be aborted by the server instead of returning HTTP 403.6 responses to the client.Dynamic IP address filtering, which allows administrators to configure their server to block access for IP addresses that exceed the specified number of requests.In IIS 8.0, Microsoft has expanded the built-in functionality to include several new features: Even though functionality can be scripted to discover malicious users by examining the IIS log files by using a tool like Microsoft's LogParser utility, this still requires manual intervention. This functionality allows administrators to customize the access for their server based on activity that they see in their server's logs or website activity. When an IP address was blocked, any HTTP clients from that IP address would receive an HTTP error '403.6 Forbidden' reply from the server. IIS 7 and earlier versions had built-in functionality that allowed administrators to allow or deny access for individual IP addresses or ranges of IP addresses.

Dynamic IP Address Restrictions built-in for IIS 8.0.ĭynamic IP Address Restrictions were available as an out-of-band module for IIS 7.5.ĭynamic IP Address Restrictions were available as an out-of-band module for IIS 7.0.

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