The new VDEplug code now supports a URL-like syntax to define the virtualnetworking system to use. While it is backward compatible, and it is supportedby many VM (kvm/qemu, virtualbox, user-mode linux, umview), now it is possibleto add the compatibility layer for current and future virtual networkingenvironments. Currently VDEplug supports: legacy VDE, point-to-point AF_UNIX or UDP, tap,vxlan, vxvde, slirp. In the developing phase of the slirp plugin, we have implemented a generalpurpose slirp library (derived from qemu's slirp implementation). VDEplug4 together with new tools for the management of namespaces andcapability create a new ecosystem for the support of virtual networking.