# Blocking Ad Server domains. Google's AdSense, DoubleClick and Yahoo
  # account for a 70 percent share of all advertising traffic. Block them.
  # local-zone: "doubleclick.net" redirect
  # local-data: "doubleclick.net A 127.0.0.1"
  # local-zone: "googlesyndication.com" redirect
  # local-data: "googlesyndication.com A 127.0.0.1"
  # local-zone: "googleadservices.com" redirect
  # local-data: "googleadservices.com A 127.0.0.1"
  # local-zone: "google-analytics.com" redirect
  # local-data: "google-analytics.com A 127.0.0.1"
  # local-zone: "ads.youtube.com" redirect
  # local-data: "ads.youtube.com A 127.0.0.1"
  # local-zone: "adserver.yahoo.com" redirect
  # local-data: "adserver.yahoo.com A 127.0.0.1"
  # local-zone: "ask.com" redirect
  # local-data: "ask.com A 127.0.0.1"