title: Special IP addresses
body: <p>In particular I'm looking for an IP address that I can put in my <code>hosts</code> file that will black-hole a given DNS name. Right now I'm using <code>127.0.0.1</code> but that would start acting odd if I installed any services.</p>
  
  <p>How can I prevent a 3rd party program from contacting a given server?</p>