1. A method to provide isolated virtual image communication in a virtual computing environment, the method executed by a processor configured to perform a plurality of operations comprising: isolating a guest virtual machine in the virtual computing environment, and the guest virtual machine's one or more clients, within a virtual network such that the guest virtual machine is unreachable from outside the virtual network, the one or more clients being outside the virtual computing environment; formulating, on the guest virtual machine, a request to a resource, or for a service, outside the virtual network; after the formulating of the request, attempting to send the request, whereupon the request is transmitted to a software resource, wherein the guest virtual machine shares the software resource with a security appliance machine software program, and the software resource shared with the security appliance machine software program, the guest virtual machine and the security appliance machine software program are hosted in the virtual computing environment; forwarding the request from the software resource shared with the security appliance machine software program to the security appliance machine software program; and after the forwarding of the request, formulating a reply to the request at the security appliance machine software program for transmittal to the guest virtual machine, the formulating the reply comprising: formulating the reply using first information in the request, and further formulating the reply using second information received at the security appliance machine software program from the resource with respect to which the request is formulated on the guest virtual machine or from the service with respect to which the request is formulated on the guest virtual machine.