Remote shut down (not stop) gateway appliance VM?

Hi,
Is there a way to remotely shut down the appliance virtual machine? I know I can stop the gateway but I have a peculiar VMware situation in which the host is inaccessible but the VM is running. SSH appears to be disabled on the appliance (unless there's a way to use a key file?). I'd prefer to shut down the VM rather than abruptly cycling the host.
Thanks