If the target website or web application you intend to scan is only reachable via an HTTP proxy, you will need to configure Acunetix On Premise to make use of that HTTP proxy server before running the scan.
You can set different proxy settings per Target in Acunetix On Premise. This is useful if different Targets you choose to scan make use of different proxy settings.
In order to configure an HTTP proxy, navigate to an existing Target > HTTP > Enable Proxy Server
You may specify the HTTP proxy server and port, together with any authentication details (only if required).