Aaron, phpVirtualBox was moved to GitHub, so recommend you post future questions there. The config.php file has a setting for what IP address VRDP should listen on. Mine is: var $vrdeaddress = '192.168.10.100'; You can also set the IP address on a specific machine using vboxmanage. vboxmanage modifyvm <vm name=""> --vrdeproperty "TCP/Address=192.168.10.100"</vm> Rich