There is now a post in the support forum to help fix the client side bug where you can't connect to Hazecraft.

Possible firewall issues aside, it has to do with your settings to resolve the DNS, which is the thing that turns "play.hazecraft.net" into our IP.

You could also just connect directly to our IP, 104.128.48.211:25565.
  "dead why did you tell us that ~gasp", anyone could already find this out with google and command prompt