Comment 2 for bug 1065523

I have the same problem in Ubuntu 12.10. I've set up a proxy in my .ssh/config file, it works on the command line but is ignored if I try to use it in nautilus.
If I'm not mistaken nautilus uses gvfs as a backend to mount remote filesystem, dunno if gvfs is supposed to read the ssh configuration file at all so this would turn the bug into a feature request.
As a workaround I'm using sshfs to mount the remote filesystem, looks like it reads the .ssh/config file correctly, it can be found in the repository.