Hallo all - I have inserted the reply from Urs Yes, on any cluster is this is possible.1. The change for that solution, in kamailio on websockets-role.conf at line 94: ## #!ifdef MY_WEBSOCKET_DOMAIN ## if (!($hdr(Origin) =~ "MY_WEBSOCKET_DOMAIN")) { ## xlog("L_INFO", "websocket|log|rejecting HTTP request with unknown origin $hdr(Origin) from $si:$sp\n"); ## xhttp_reply("400", "Bad Request", "", ""); ## exit; ## } ## #!endif (maybe you see a secure problem? if so, please tell me) 2. The solution is also to cross signup your SUBDOMAINS eg. abc.zswitch.net and also the webserver certificate e.g. www.odoo.com with a self generated root certificate and install this on the customers desktop. 3. On any new subdomain will need a cross-signup to the root certificate We will install a demo server in USA then all can try self. I hope we get ready soon. It will have a howto at signing in. Freundliche Grüsse U. Rüedi