When running Twisted or Standalone without a proxy, the wiki url contain the server name (and sometimes also the port) and the page name. For example: localhost:8000/pagename.
However, when running behind a proxy, the wiki url contain the proxy host, not the server name, and may include a "script_name". In this case, the wiki that run on localhost:8000 might have a url of www.example.com/exwiki/pagename when you access it through the proxy, and localhost:8000/pagename when you access it locally.
If you want to use same configuration file for both local and world access, use settings like this in your farmconfig.py:
wikis = [('exwiki', r'^(localhost:8000|www.example.com/exwiki).*')]If you want to have different configuration for local and world access:
wikis = [('exwiki_local', r'^localhost:8000.*'),
('exwiki_world', r'^www.example.com/exwiki.*'),]