Where to set proxy settings?

[Abiku]

I installed Elxis 2009.2 at my job some weeks ago. Our network access external resources through a proxy, so I see an error message "fsockopen error: php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution" everytime I try to read newsfeeds from external sites.
Is there a way in Elxis administration to set proxy parameters in order to access those resources?
Please, forgive me if the answer is obvious, but I can't find such an option in Administration... and also forgive my poor english knowledge.

Abiku

17/mar/2011 --- One possible solution: edit ../components/com_newsfeeds/newsfeeds.html.php just putting $feed->force_fsockopen(false); instead the original $feed->force_fsockopen(true); in the body of function showNewsfeeds(&$newsfeeds, &$params)

.. you tell me if that worked for your particular case.