If you encounter this error while trying to upgrade your installation (through the console), try this:
- from the console,, try pinging data.alienvault.com (18.104.22.168) - it should certainly work;
- check your /etc/hosts file for that location - if it doesn't exist, update the record;
- restart your networking service;
- try upgrading the system again - you should now see the system doing the update / upgrade procedure.