Protect against Slowloris attack on Web Admin GUI

Hi Forum,

I want to achieve following in regards to Web GUI access to FG 200D (version v5.6.2)

1. Limit the number of requests that users can submit via a single IP address within a defined time frame. 2. Lower the request timeout to a reasonable number, such as 30 seconds. 3. Protect against slow headers attacks.

Anyone knows how this can be achieved.

Thanks in advance.