Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for receiving one or more respective socket commands from a virtual machine socket core, the one or more respective socket commands being associated with a respective socket destination address; determining, based on the one or more respective socket commands and the respective socket destination address, whether to communicate data associated with the one or more respective socket commands to a host virtual socket device; and in response to determining to communicate the data associated with the one or more respective socket commands to the host virtual socket device, converting the socket destination address to a Uniform Resource Identifier (URI) address and communicating the data associated with the one or more respective socket commands and the URI address between the host virtual socket device.