[libvirt-users] Port forwarding for KVM

Hi all, Let me illustrate what I want to do. I want to launch a QEMU "inside" a KVM virtual machine, then get that QEMU's vnc output. I am using libvirt 0.9.13 (`libvirtd --version`), and attach is my vm's original config xml. Is there a simple way to achieve my goal? I was told that iptable solution I found on the web is for "tap" interface, and I can use "hostfwd" QEMU option if I use "user" interface. For the latter approach, I basically follow this one [1] with the QEMU cmdline option below: <qemu:commandline> <qemu:arg value='-net user,hostfwd=::5902-:5901'/> </qemu:commandline> But virsh always keep saying: error: internal error Process exited while reading console log output: kvm: -net user,hostfwd=::5902-:5901: invalid option What I am missing here? I also found there was a patch for user mode port forwarding [2]. Does that mean I can write libvirt xml directly to do port forwarding? If so, could someone give me hint on how to write one? The last question is, do I have to change the interface type from "network" to "user" so that I can do port forwarding? Thanks in advance! :) [1] http://snippets.webaware.com.au/snippets/running-qemu-with-port-redirecti... [2] http://www.redhat.com/archives/libvir-list/2012-May/msg00538.html Regards, chenwj -- Wei-Ren Chen (陳韋任) Computer Systems Lab, Institute of Information Science, Academia Sinica, Taiwan (R.O.C.) Tel:886-2-2788-3799 #1667 Homepage: http://people.cs.nctu.edu.tw/~chenwj