On Thu, Oct 30, 2008 at 10:48:49AM -0700,
Shawn Somers wrote
a message of 38 lines which said:

> Oct 30 10:27:35 cp named[3754]: transfer of 'xxx.xxx/IN' from
> 209.147.123.91#53: failed to connect: host unreachable


Routing problem (check with UDP and ICMP - ping, to see) or firewall
blocking TCP access.

A good test would be:

tcptraceroute 209.147.123.91 53