I'm using VMware player with Debian installed as guest. I have Windows installed on the host machine. On the network preferences I'm using Bridged network but in Windows task manager i can see the network usage of the network adapter. Using Wireshark i can see the packets of the virtual machine, so the VM Network is not isolated and the host machine (Windows) can see all the packets of the VM. Can be this a security problem? Can a Malware or an infected website infect the host OS? On Debian i have used Iptables to deny the output connection to the Host ip. Kaspersky internet security (Installed on Windows) can't see the network used by the Virtual machine.