On Mon, May 08, 2017 at 04:57:58PM +0100, Daniel P. Berrange wrote:
On Mon, May 08, 2017 at 11:30:46AM -0400, Nicolas Bock wrote:
> On Mon, May 08, 2017 at 03:35:19PM +0100, Daniel P. Berrange wrote:
> > On Sat, May 06, 2017 at 08:09:49PM -0400, Dan wrote:
> > > On Fri, May 5, 2017 at 4:29 PM, Nicolas Bock <nicolasbock(a)gmail.com>
wrote:
> > >
> > > > Hi,
> > > >
> > > > I am running a webserver on the libvirt host and would like to add a
> > > > nwfilter such that a VM can access that server. The corresponding
iptables
> > > > rule would look like this:
> > > >
> > > > iptables --append INPUT --in-interface virbr0 --destination
192.168.122.1
> > > > --protocol tcp --dport 80 --jump ACCEPT
> > > >
> > > > where the network is using virbr0 and sits at 192.168.122.1. I
don't want
> > > > to hardcode the host IP address in the nwfilter so that I can use
that
> > > > filter for other networks. Is it possible to reference the host's
IP
> > > > address in the filter?
> >
> > There is a pre-defined parameter for the VM's own IP address:
> >
> >
http://libvirt.org/formatnwfilter.html#nwfelemsRulesAdvIPAddrDetection
> >
> > but we don't have anything for the host's IP address. We could fairly
> > easily add it though I reckon - eg provide a HOST_IP parameter.
>
> Thanks Daniel.
BTW, please don't misinterpret this to mean i'm going to actually implement
this myself. I mostly meant a) file a RFE bug report against libvirt's
upstream bug tracker b) if you feel motivated to look at it, you could
try writing a patch for libvirt and submit it :-)
No, I hadn't interpreted your statement like you were going to
implement it :)
I'll file a bug. And I'll have a look at the code.
Thanks,
Nick