libvirt users - Jun 2020 - Re: No outbound connectivity from guest VM(fedora 32)

Hi,

I recently installed a fresh install of Fedora 32 and I am having
trouble with my virtual machine networking, I can ssh and connect into
my guest VMs from my host, but the guest VMs cannot ping out to the
internet.

I am using the "default" NAT virtual network, the interesting thing is
I have made no configuration changes on my host or in the guest VMs,
simply created and installed two VMs(Fedora and RHEL8) in Fedora where
the VMs are having the same issue.

I am happy to provide any logs or command output if that would help.

-Justin

On Fri, Jun 05, 2020 at 01:27:08PM -0400, Justin Stephenson
wrote:
> Hi,
> 
> I recently installed a fresh install of Fedora 32 and I am having
> trouble with my virtual machine networking, I can ssh and connect into
> my guest VMs from my host, but the guest VMs cannot ping out to the
> internet.
> 
> I am using the "default" NAT virtual network, the interesting
thing is
> I have made no configuration changes on my host or in the guest VMs,
> simply created and installed two VMs(Fedora and RHEL8) in Fedora where
> the VMs are having the same issue.
> 
> I am happy to provide any logs or command output if that would help.
Do you have "podman" installed on your host ? As there is an issue
with podman loading "br_netfilter" which is harming libvirt default
network traffic..


Regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|

On Mon, Jun 8, 2020 at 5:09 AM Daniel P. Berrangé <berrange@redhat.com>
wrote:
>
> On Fri, Jun 05, 2020 at 01:27:08PM -0400, Justin Stephenson wrote:
> > Hi,
> >
> > I recently installed a fresh install of Fedora 32 and I am having
> > trouble with my virtual machine networking, I can ssh and connect into
> > my guest VMs from my host, but the guest VMs cannot ping out to the
> > internet.
> >
> > I am using the "default" NAT virtual network, the
interesting thing is
> > I have made no configuration changes on my host or in the guest VMs,
> > simply created and installed two VMs(Fedora and RHEL8) in Fedora where
> > the VMs are having the same issue.
> >
> > I am happy to provide any logs or command output if that would help.
>
> Do you have "podman" installed on your host ? As there is an
issue
> with podman loading "br_netfilter" which is harming libvirt
default
> network traffic..
Hi, yes I am using podman for some development tasks. However I don't
see any br_netfilter module loaded:

 # lsmod | grep br_netfilter
 # grep 'netfilter' /proc/modules

I'm not sure if it matters but my host laptop is also connected wirelessly.

-Justin
>
>
> Regards,
> Daniel
> --
> |: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange
:|
> |: https://libvirt.org         -o-            https://fstop138.berrange.com
:|
> |: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange
:|
>