In your named.conf, you will find this:
// If you've got a DNS server around at your upstream provider, enter // its IP address here, and enable the line below. This will make you // benefit from its cache, thus reduce overall DNS traffic in the Internet. /* forwarders { 127.0.0.1; }; */
I have always turned that on. I like to use my upstream hosts.
Today, I turned it of, because of this:
$ host lkjsdf lkjsdf has address 199.101.28.20 Host lkjsdf not found: 3(NXDOMAIN)
What’s that IP address? That’s not relevant, but it is important. It’s the hostname of a web assistant engine. My upstream has decided to implement what I think is a dirty hack.
I have since disabled forwarding on all my DNS servers.