Re: [Xen-users] DOM0 networking - dead to the outside world

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

> On Thu, Mar 22, 2007 at 08:35:03PM +0000, Alan Pearson wrote:
>   
> > Now I have the pleasure installing Xen  3.0.4.1 on RHEL4.4 (host +  
> > guests, using xensource RPMs) system, and I'm having a nightmare with  
> > Dom0 networking.
> > The DomUs can see the outside world AND the Dom0 eth0 address, but  
> > Dom0 cannot see the outside world nor the outside world see it.
> > Dom0 can ping the guests fine, and the guests can ping Dom0.
> >
> > For the purposes of this discussion, outside world means 'same subnet  
> > on the physical interface'
> > Dom0 networking works fine before network-bridge is started, after it  
> > starts, no more Dom0 networking.
> > I've really no idea what is wrong, and hours and hours playing with  
> > Linux bridging has got me nowhere ;-(
> > There doesn't seem to be any iptables rules stopping traffic, and  
> > selinux is disabled.
> >
> > The output of the brctl show & ifconfig commands looks identical on  
> > the xen3.0.4.1 to the working 3.0.2-2 systems, so I'm lost.
> > Running tcpdump -s0 -L -A   produces no output on any interface.
> >
> >     
It's probably iptables: I've not seen a good write-up on how to deal 
with this, but if you don't need or want iptables filtering Dom0, you 
can disable it.
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