If you are able to connect on our demo site, it could be something related to your website. But again, it's very weird because the web server is not involved in the WebRTC process, thus normally my site or your site should not make difference, only the LAN should make difference.

However there could be some javascript issue on the website, it would be better if you contact me by email providing an admin account. I will test it at my end too.

John