Causes the Network Server to listen on a specific network interface.
This property allows multiple instances of Network Server to run on a single machine,
each using its own unique host:port combination. The host needs to be set
to enable remote connections. By default, the Network Server will listen only
on the loopback address. If the property is set to 0.0.0.0, Network Server
will listen on all interfaces. Ensure that you are running under the security
manager and that user authorization is enabled before you enable remote
connections with this property. 
Syntax
 derby.drda.host=hostname
 Default
 If no host name is specified, the Network Server
listens on the loopback address of the current machine (localhost).
 Example
 derby.drda.host=myhost
 Static or dynamic
 Static. You must restart the
Network Server for changes to take effect.