I just noticed yesterday I was having a problem where pfsense can't check for updates to its self or to packages. In the system log I get this error "php: /index.php: XMLRPC communication error: Operation timed out".
Dashboard says "Unable to check for updates" and the Available Packages list is empty and says "Unable to communicate with www.pfsense.com
. Please verify DNS and interface configuration, and that pfSense has functional Internet connectivity." All computers behind pfsense have no problem accessing www.pfsense.com
Everything was working probably week and a half ago. Here's my update url, http://updates.pfsense.org/_updaters
I did see this thread from not long ago http://forum.pfsense.org/index.php?topic=51229.0
but the resolution the OP found does not work for me as IPv6 is already disabled in my case.