Default BIND installation on CentOS could not get answer from forwarders. Forwarding resulted in the error (
/var/log/messages) similar to this:
Dec 8 20:30:27 small named: error (broken trust chain) resolving 'google.com/A/IN': 184.108.40.206#53
The problem was date/time settings. It was test virtual machine which is often suspended leading to the time gap. Setting date/time settings solved the problem (get the current time string on another machine by typing date):
date -s 'Sun Dec 11 21:54:58 SGT 2011'