> And I configured the machine to forward all queries to the up level DNS > server. You are testing nothing, unless you can control forwarder up level DNS cache and you flush cache after each test. What could have happened is that first run using Unbound filled uplevel DNS server cache and when you tested Bind it just reused those entries. Disable all forwarders and try it again. (And it won't hurt if you could put your testing config files online and send a link here...) Ondrej.