I see there is a server option --proxy-mode that is intended to "Enable correct behavior when behind a reverse proxy". We have been running OpenERP behind a proxy without this option, and it sees to work fine. What would you expect a user would see failing when this option is not used?
I tracked it into server/openerp/service/wsgi_server.py Line 421
And werkzeug.pocoo.org/docs/contrib/fixers/?highlight=proxyfix#werkzeug.contrib.fixers.ProxyFix
I would like to know as well. My OpenErp instance is behind an nginx reverse proxy with SSL and I have this this flag turned on. For the longest time is was off and it seems to work fine.