Problem:

My PC on campus sits behind a proxy (requiring authentication) and I can't setup Dropbox. I am convinced that this is a proxy issue as I can't setup Ubuntu one either (but I don't use Ubuntu One so that is not a problem). I have looked at the Ubuntu One fix but it seems to be to modify settings explicitly related to Ubuntu One. I can install the nautilus-dropbox package (compiled from source and from .deb package from website and from software centre) but once I click OK from the "Dropbox Installation" dialog box (prompting me to download the proprietary daemon) the installation just freezes with the OK button pressed. When I look at its process in System Monitor its waiting channel is inet_wait_for_connect.

I have set the following proxy directives thus far:

1. Added mj22:**@proxy.waikato.ac.nz:80 information to network proxy settings under network in settings.
2. Added http_host and http_port variables under gconf-editor->system->proxy
3. Added 'host', 'authentication_password' 'authentication_user' and ticked 'user authentication' and 'use_http_proxy' under gconf-editor->system->http_proxy
4. Added export http_proxy="http://mj22:**@proxy.waikato.ac.nz:80/" to /etc/bash.bashrc
5. Added Acquire::http::proxy "http://mj22:**@proxy.waikato.ac.nz:80/"; to /etc/apt/apt.conf (which is what I imagine is letting Software Center retrieve packages).

(where ** is my password)

I have also added the equivalent ftp and https lines for the above entries. I get the internet fine and Software Centre can download packages but thats it.

Related issues:

1. The software centre can't fetch reviews (but can download packages).
2. When trying to add an online account in Gnome 3 a dialog pop up appears with "Error getting a Request Token: Cannot connect to proxy (proxy.waikato.ac.nz)"

Updates:

After some time (10mins ish) Dropbox shows an error dialog box that reads:

Trouble connecting to Dropbox servers. Maybe your internet connection is down, or you need to set you http_proxy environment variable.

Is there a way I can see what environment variables are currently set?