The most significant changes starting from the bind-9.3.2-5mdk package:

 o Installs in a chroot environment per default (/var/lib/named) for 
   security measures.

 o Acts as a caching only resolver per default, ip addresses that should be
   allowed to use recursive lookups must be defined in the 
   /var/lib/named/etc/trusted_networks_acl.conf file.