Can you try to connect via the IP address directly with the MC client? Do you get the same error message? Is there any output in the server/dashboard logs?
You can also try installing a telnet client on the mac and then run:
telnet 192.168.1.157 <port>
where <port> is either 25565, 25575 or 22 (try all of them to see if you get a socket connection) to see if the server is actually reachable over TCP.