I normally made a 1.8.8 CraftBukkit Server, a hostname in No-IP, installed DUC, port-forwarded 25565, made an exception for 25565 in Windows Firewall, checked if "Java(TM) Platform SE Library" was allowed in both Private and Public modes, and Minecraft says "Can't connect to server." I used to put "server-ip=" as my internal IP back in 1.6.4 and it always worked, but now it says "FAILED TO BIND TO PORT". I searched a little and found out that it was supposed to be left blank, so I did that and now the server actually runs, but now I get "Can't connect to server." Just for the record, I tried disabling firewall and I checked if my port-forwarding actually worked in this website. It says: "Host is up." and state says "filtered".