What are Host Attacks? How to Avoid Host Attacks Successfully? Reading Time: 3 minutes Web servers are configured in a way that allows them to host a number of different web applications and websites on the same IP address. It is the reason why the host header exists. The host header specifies which web application or website is responsible for processing the incoming HTTP request. The web server then makes use of the header value for dispatching the request to the specified web application. But what would happen when someone specifies an invalid host header? It can lead to host attacks. In this article, we will discuss host attacks and what are the different host attack vulnerabilities.