This article describes the steps to enable Slow HTTP protection for a web server. The following sections are covered:
Applies to the following Sophos products and versions Sophos Firewall
Slow HTTP attacks are denial-of-service (DoS) attacks in which the attacker sends HTTP requests in pieces slowly, one at a time to a Web server. If an HTTP request is not complete, or if the transfer rate is very low, the server keeps its resources busy waiting for the rest of the data. When the server’s concurrent connection pool reaches its maximum, this creates a DoS. Slow HTTP attacks are easy to execute because they require only minimal resources from the attacker.
In Sophos XG Firewall, the Slow HTTP attacks can be protected by setting a timeout for request headers.
Note: The SlowHTTP Protection is a global only option. It will apply to all web servers added.
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