Flowable Engage uses advanced Web 2.0 technologies to allow real time communication directly within a browser.
To achieve this, all network components (routers, firewalls, proxies, browsers, etc.) need to support the WebSocket technology as specified in RFC 6455.
If your infrastructure is not WebSocket capable, a fallback is to use either the supported streaming or long polling options. These alternatives will have some impact on your infrastructure requirements.
It is also possible to allow or deny the use of WebSockets on a user role level.