Quote from NuclearSoftworks Can't resolve hostname means the hostname of the server you have entered is mistyped. Be sure there's no extra spaces, or characters in the address you typed in. If the connection does not work you'd get a connection error.note-I have a different router to most people so it will not be the same ip address). When you port forward you put in this address (ipv4) for the router to know what it is port forwarding form. So you must re-port forward with that ip address and every thing will be back to normal.