I just set up an instance. The web interface was accessible after the first boot, but not after rebooting.
Nothing is listening on port 5000 anymore:
ubuntu@ip-172-31-40-32:~$ netstat -ln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp6 0 0 :::22 :::* LISTEN
udp 0 0 0.0.0.0:68 0.0.0.0:*
Ideas?