Is there anything (app? / service?) that can test the DNS service on my server? I've been trying to get a DNS issue resolved on my server because everything 'appears' to be working as it should and configured correctly, but when I try to point the DNS services at my registrar (GoDaddy) to my server, they give me an 'unavailable' error. My server is behind a router, but I have the server declared as a DMZ for now, so I don't have to worry about forwarding issues until this is resolved. Every request on every port should get forwarded to it... so, it *should* be 'available' ...not 'unavailable'. Does anyone know of anything I can use to test the availability of my DNS services on my server?