Okay, I can give you a short design overview how you can make this work: a) client browser -> gets novnc from ovirt-engine or any other host where you host it. b) client browser(novnc) gets the ticket and path via rest api c) client browser(novnc) -> connects to websocket-proxy with the rest-api ticket and "path" (destination host where the vm is hosted) please note, that websocket-proxy must be reachable from client browser d) websocket-proxy needs a connection to the cluster and host where the vm runs, keep in mind you need to configure your display network in ovirt accordingly. I guess you just have an error in your network setup. So you need to expose at least the websocket-proxy to the client browser and this proxy must be able to reach the vm host. furthermore for passing the ticket you need a host example.com which can connect to engine and can connect to the client browser, e.g. the websocket proxy or any other machine you want to use for that. you could also expose the engine itself, but it depends on your client browser if you want to do this (security)! HTH -- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen