I have setup a reverse proxy for pre-authentication of http requests to Xeoma. I used Apache for a similar task a year ago, but NGINX this time. They are quite similar in reverse proxy matters.
It works partially; I get prompted for authentication on the reverse proxy. Once authenticated I successfully see the Xeoma web site where I enter username and password. Then things stop
I see Xeoma puts the username and password in the URL, making a http redirection somehow, and then it gets back to the login web site. So, I once again get prompted for username and password. I can repeat this over and over. So, it seems like the Xeoma URL redirection is incompatible with reverse proxy.
Felenasoft: If you contact me by mail, I can setup a user account for you, for quick testing, if you like.