title: How can I test my DNS and site configuration
body: <p>I've received a few messages from users of my site that they can not access it from home. </p>
  
  <p>They can access the server from the IP, but not by the domain name. </p>
  
  <p>I think it has something to do with the way my DNS is configured. I setup my own DNS server about 4 years ago on my server, which I probably should not have done, and I'm not sure if everything is configured correctly. There are plenty of people who can access the site without any problems, but some users get 'server can not be found'. </p>
  
  <p>Server Details: Windows 2003 co-located server at a small local hosting company. </p>
  
  <p>Are there good tools or sites that can test and provide configuration recommendations? How do I test this problem when it works fine for me and so many other users? What type of questions should I ask users that can't access the site?</p>
  
  <p>Can I provide / point to another DNS server that can be used if the first server isn't working?</p>
  
  <p>Thanks! </p>