We have the business requirement to run confluence behind multiple reverse proxies. (one for internal target audience, one for external target audience, ...)

There are two restrictions within confluence which prevent this:

1)
CSRF-protection requires the definition of ONE proxyName in Server.xml
https://confluence.atlassian.com/kb/cross-site-request-forgery-csrf-protection-changes-in-atlassian-rest-779294918.html
https://confluence.atlassian.com/confkb/after-upgrading-confluence-you-are-unable-to-create-new-pages-or-spaces-785457379.html
https://confluence.atlassian.com/kb/proxying-atlassian-server-applications-with-apache-http-server-mod_proxy_http-806032611.html

2)
Confluence forces the admin to define ONE Server Base URL.
https://confluence.atlassian.com/conf59/configuring-the-server-base-url-792499673.html

We´d like to see a future enhancement which allows us to run confluence behind multiple reverse proxies.