I'm sorry... is this not the right place to ask this kind of questions? Is there another more user-oriented list or forum? TIA On Tue, Mar 31, 2009 at 16:08, Mariano Absatz <el.baby@gmail.com> wrote:
Hi,
I'm new to libvirt but not a complete neophite.
I'm using libvirt and kvm in ubuntu with "vmbuilder".
I'm creating a couple of VMs inside a host that is directly connected to internet with a public routeable address. Since I only have one public address, I won't use bridging.
I'm using shorewall (www.shorewall.net) to configure my iptables rules.
I intend to use DNAT to route specific ports in the host to one or other VM.
With standard masquerading, I give the VMs access to the outside world.
At first I used the 'default' network (with a different rfc1918 network)... everything was kinda working until I rebooted the host... at that point I lost connectivity between the outside world and the VMs. From inside the host I had no trouble connecting to the VMs.
If I restarted shorewall (which actually cleans all iptables rules and regenerate them according to its configuration) everything works fine. After sending a report and some debugging in the shorewall mailing list, it was clear that libvirt was adding rules to iptables.
After reading a bit (http://libvirt.org/formatnetwork.html#examplesPrivate) I created a new network called "isolated". I stopped default (and disabled its autostart), and defined and started isolated.
This is the content of isolated.xml: <network> <name>isolated</name> <uuid>51cffbcc-88f5-4edc-a81c-1765c1045691</uuid> <bridge name='virbr%d' stp='on' forwardDelay='0' /> <ip address='10.3.14.1' netmask='255.255.255.0'> <dhcp> <range start='10.3.14.128' end='10.3.14.254' /> </dhcp> </ip> </network>
I modified my VMs to use isolated rather than default, but rules keep being added to iptables when libvirt-bin is started.
Is there a way to convince libvirt not to add these rules?
Feel free to ask for any data that I didn't send here.
TIA.
-- Mariano Absatz - El Baby www.clueless.com.ar ######################### "An archaeologist is the best husband a woman can have. The older she gets the more intereste...