This message indicates that your name server may be guarding itself against one type of network attack:
Jun 11 11:40:54 terminator named[131]: Response from unexpected source
([204.138.114.3].53)
Your name server sent a query to a remote name server, and a response came, but it wasn't from any of the addresses your name server had listed for the remote name server. The potential security breach is this: an intruder causes your name server to query a remote name server, and at the same time the intruder sends responses (pretending the responses are from the remote name server) that the intruder hopes your name server will add to its cache. Perhaps he sends along a false PTR record, pointing the IP address of one of his hosts to the domain name of a host you trust. Once the false PTR record is in your cache, the intruder uses one of the BSD "r" commands (e.g., rlogin) to gain access to your system.