permalinks with reverse proxy

My public domain is, this is a reverse proxy apache.
my website sits on ex).
I want to enable the permalinks but i get 404 with everything i tried.
My questions:
1. should the reverse proxy pass be or
2. what should i write as the site url and wp adress in wp settings?
3. what should be written in the .htaccess file for the rewrite?

Thanks alot