problem getting repository

am using proxy server to get clone on linux. When i type command of git clone

" git clone git://anongit.freedesktop.org/libreoffice/core libo "

i get following errror:

anongit.freedesktop.org[0:
131.252.210.161]: errno=Connection refused fatal: unable to connect a
socket (Connection refused)

Unable to understand. I even ping. And set http.proxy with my proxy and port address.

Help!

I am behind a HTTP proxy, I even try

http://anongit.freedesktop.org/git/libreoffice/core.git

and get this new error:

Cloning into core... error: The requested URL returned error: 403

while accessing
http://anongit.freedesktop.org/git/libreoffice/core.git/info/refs

fatal: HTTP request failed

Please, Help!