So we just recently upgraded our testing enviroment's Confluence to 6.2 from 5.5.2. I noticed that the new collaboberative editing feature is using websocket. I have configured the reverse proxy on the Confluence server successfully. However, due to requirements, I need to have another server running Apache (2.2.15) to proxy the request to the Confluence instance. While I didn't have any trouble configuring HTTPS proxy and Confluence is accessible, collaberative editing is not working at all and I am not clear on the Apache config to fix it. The workflow from the user's perspective is:
User -> Web server (Apache) -> Confluence (Apache)