Do not configure your host to send network information to a virtual machine unless you are using products that use the vSphere Network Appliance API (DvFilter). If the vSphere Network Appliance API is enabled, an attacker might attempt to connect a virtual machine to the filter. This connection might provide access to the network of other virtual machines on the host.
If you are using a product that uses this API, verify that the host is configured correctly. See the sections on DvFilter in Developing and Deploying vSphere Solutions, vServices, and ESX Agents. If your host is set up to use the API, make sure that the value of the Net.DVFilterBindIpAddress parameter matches the product that uses the API.