Webserver Protection forms authentication do not have any kind of validation for wrong username or password. IF a user types in incorrect credentials there is not notification why, just reloads page. This product is not ready for production without it. Even the Hotspot login page have customization for errors. https://docs.sophos.com/nsg/sophos-firewall/17.5/Help/en-us/webhelp/onlinehelp/nsg/sfos/concepts/LoginPageTemplate.html