bundle -> https

git can't get a connection to github from vm

ubuntu@ubuntu-VirtualBox:~/dev/dryade/chouette2$ bundle install
Fetching git://github.com/dryade/ffi-proj4.git
fatal: unable to connect to github.com:
github.com[0: 207.97.227.239]: errno=Connection timed out

Git error: command `git clone 'git://github.com/dryade/ffi-proj4.git' "/home/ubuntu/.bundler/cache/git/ffi-proj4-d9cc920f00a4de55bdcf378d550a9b32e15ac9a4" --bare --no-hardlinks` in directory /home/ubuntu/dev/dryade/chouette2 has failed.