For security reasons, you should never allow user Web browsers to connect directly to the machine hosting the Endeca Server and the Endeca data stores.
Browsers started by non-administrators should always connect to your application through an application server.
The Oracle Endeca Server and the Endeca data store Dgraph process support both IPv4 (Internet Protocol Version 4) and IPv6 (Internet Protocol Version 6) addressing schemes for connections. This IPv4 and IPv6 addressing support is configured automatically in the Oracle Endeca Server and the Dgraph, so there is no need for the administrator to do any explicit addressing configuration.