Thanks Dan! I was indeed missing some modules (I just switched to the 2.6.20 kernel series and didn't find a couple of the necessary switches in menuconfig). I'm still having problems with the networking. If I try to start libvirt_qemud without have the bridge defined, I get this error: smoyernew images # libvirt_qemud --system iptables: Invalid argument Failed to autostart network 'default': failed to add iptables rule to allow forwarding to 'virbr0' : Invalid argument If I create virbr0 and then start libvirt_qemud, I get this error: smoyernew images # libvirt_qemud --system Failed to autostart network 'default': cannot create bridge 'virbr0' : File exists In any case, the guest domains don't end up with connectivity through the bridge. I think I'm missing something basic, but it's been a while since I used iptables for anything. I also have one error that I'm trying to track down from virt-manager's GUI. I seem to have something misconfigured with GTK and dbus: (virt-manager.py:5482): Gdk-WARNING **: Connection to display localhost:10.0 appears to be untrusted. Pointer and keyboard grabs and inter-client communication may not work as expected. libvir: QEMU error : internal error cannot create bridge 'virbr0' : File exists Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/host.py", line 117, in start_network net.start() File "/usr/share/virt-manager/virtManager/network.py", line 64, in start self.net.create() File "/usr/lib/python2.4/site-packages/libvirt.py", line 402, in create if ret == -1: raise libvirtError ('virNetworkCreate() failed', net=self) libvirt.libvirtError: virNetworkCreate() failed internal error cannot create bridge 'virbr0' : File exists /usr/share/virt-manager/virt-manager.py:242: GtkWarning: Coercing GDK_INPUT_ONLY toplevel window to GDK_INPUT_OUTPUT to work around bug in Xorg server gtk.main() process 5482: D-Bus library appears to be incorrectly set up; failed to read machine uuid: Failed to open "/var/lib/dbus/machine-id": No such file or directory See the manual page for dbus-uuidgen to correct this issue. D-Bus not built with -rdynamic so unable to print a backtrace Thanks again for all the help! smoyer > Make sure you have the iptables modules for your kernel. At the very > least we use the filter & nat tables, and the state module for > connection tracking. -- Steven W. Moyer Principle Architect, Assurance Applications C-COR Solutions, LLC 60 Decibel Road State College, PA 16801 Office Phone: 814-231-4408 Front Desk: 814-238-2461 Cell Phone: 814-883-0391 Fax: 814-278-6540 E-mail: smoyer@xxxxxxxxx AIM: StevenWMoyer ICQ: 349680381 Jabber: smoyer1@xxxxxxxxxxxxxxxxx MSN: smoyer64 Yahoo: smoyer64