The invention relates to a message brokering system for connecting a client in a local publish/subscribe messaging system to a remote message broker. The system comprises a message broker in said local publish/subscribe messaging system and a metabroker application means representing said remote message broker. The local message broker comprises publish/subscribe means for proxying messages between the client and the metabroker application means. The metabroker application means comprises publish/subscribe means for proxying messages between the local broker and the remote broker.