Error:
Secure Admin must be enabled to access the DAS remotely.
Description:
The administration is not enabled to be used remotely, therefore requires to be enabled.
Solution:
./asadmin --host [host] --port [port] enable-secure-admin
Reference:
http://docs.oracle.com/cd/E18930_01/html/821-2435/gkomz.html
Secure Admin must be enabled to access the DAS remotely.