A communication network for providing seamless peer-to-peer connectivity between nodes of different communication network environments, the communication network comprising at least one tunneling server comprising an access unit for providing access to the communication network and an addressing unit for assigning a dynamic address of a first addressing scheme routable in the communication network to a node connecting itself to the tunneling server, the node having a fixed address of a second addressing scheme, and storing at runtime an association between the fixed address of the second addressing scheme and the dynamic address of the first addressing scheme.