In 1.x we don't have the ability to modify host and port information on a node by node basis. We do in 2.x but we haven't ported the domain manager there yet.
You can change the defaults that the domain manager uses but it's tricky. The domain manager actually uses an SCA composite file [1] to define the services that it provides. If you really need to change these you would have to update the composite and rebuild the domain manager jar. Regards Simon [1] http://svn.apache.org/repos/asf/tuscany/sca-java-1.x/trunk/modules/domain-manager/src/main/resources/DomainManager.composite
