I have a single site hosted with IIS on a dedicated Windows Server 2008 box. Recently, the domain name has stopped resolving and is returned as "unreachable" by ping - the server itself is fine, and the site still accessible by IP address. What could have gone wrong, and how can I track the problem down and solve it?
A good place to start is Iptools.com. You can start troubleshooting any web-based issues from DNS to IP connectivity. It'll help you track down registrants and so on as well.