In /etc/named.conf, in the options block, uncomment/change/add the lines (changing 10.3.0.0/24 to reflect your LAN subnet):
$this->bbcode_second_pass_code('', 'listen-on { any; };
allow-recursion { 127.0.0.1; 10.3.0.0/24; };')
http://lmgtfy.com/?q=named.conf