Since March 7, 2012 our users was able to connect to http://facebook.com through squid 3.1.16 in non-transparent mode. After the recent troubles with facebook servers we are unable to connect to the http://facebook.com, this page is not load at all and then squid generates connection timeout error. Some of other pages like http://ru-ru.facebook.com or http://de-de.facebook.com/ works fine. I am able to connect to http://facebook.com without our proxy or if I use some external anonymizer which allows users to connect to restricted sites. I have already tried to delete all restriction for facebook from my proxy, turn forwarded_for option OFF but it had no effect. Also I am able to connect to facebook directly from proxy PC via w3m browser. Any ideas for what else could be done?
