Redmine

Hi.

I've never used Ruby or Rails before, but I saw Redmine used someplace, liked it, and want to set up my own.

It's running on an internal server, I have Apache with the reverse proxy configuration in front of it. Apache serves a lot of other stuff, so I moved redmine to be served on /redmine. I added 'map /redmine' to config.ru and set relative_url root to '/redmine' in environment.rb. It all works when I access it from the local system. But it returns 404 when I'm connecting to it through the proxy. I don't quite understand why (and it may not even be related to Redmine, but to Rails/WEBrick instead), except that is seems to have something to do with presence of X-Forwarded* headers.

Works:

[vps@druid]~/soft/redmine-2.3.2$ telnet druid.vps 3000
Trying 10.12.74.12...
Connected to druid.vps.
Escape character is '^]'.
GET /redmine HTTP/1.1
Host: druid.vps:3000
Connection: close

HTTP/1.1 302 Found 
Location: http://druid.vps:3000/redmine/login?back_url=http%3A%2F%2Fdruid.vps%3A3000%2Fredmine%2F
Content-Type: text/html; charset=utf-8
X-Ua-Compatible: IE=Edge,chrome=1
Cache-Control: no-cache
X-Request-Id: 715a05aef92c079c9736007f23833c2a
X-Runtime: 0.004528
Date: Mon, 12 Aug 2013 07:27:51 GMT
X-Rack-Cache: miss
Server: WEBrick/1.3.1 (Ruby/2.0.0/2013-06-27)
Content-Length: 153
Connection: close

Doesn't work:

[vps@druid]~/soft/redmine-2.3.2$ telnet druid.vps 3000
Trying 10.12.74.12...
Connected to druid.vps.
Escape character is '^]'.
GET /redmine HTTP/1.1
Host: druid.vps:3000
X-Forwarded-Host: public.host.com
Connection: close

HTTP/1.1 404 Not Found 
Content-Type: text/plain
X-Cascade: pass
Content-Length: 19
Server: WEBrick/1.3.1 (Ruby/2.0.0/2013-06-27)
Date: Mon, 12 Aug 2013 07:27:40 GMT
Connection: close

Not Found: /redmineConnection closed by foreign host.

So, once X-Forwarded-Host header is found, things just stop working. Anything that would help me understand why?

Thank you.