Hey guys, so i was having the same problem as you guys with the "cant reach server" error , when i found out what was wrong. i created a hotspot with my phone, and i could connect to everything fine. now i have a port forwarded server, so what im thinking is th problem is the port forward itself. i think that when you port foreward, you make it so that the only server that you can connect to that uses the Original port (25565) is yours. so you might have to change your server to a different port to be able to connect to other servers.
[SOLVED] Minecraft 1.5 "cant reach server" error!