Open Stack

If you attach a VM to a provider network - instead of to a tenant network -
and give it an Internet-routable fixed IP address, it can access the
Internet without any NAT.  This has been the case for several OpenStack
releases.

Now that Neutron has address scopes, I believe it will soon be the case
that a Neutron virtual router will avoid NAT when forwarding traffic
between networks with the same address scope.  That means that it should
soon be possible for VMs attached to tenant networks to access the Internet
without any NAT, too.

Regards,
   Neil


On Thu, May 19, 2016 at 6:02 AM Rui Mao <maorui2k at 163.com> wrote:

>
> http://docs.openstack.org/mitaka/install-guide-ubuntu/environment-networking.html#environment-networking
>
>
>
> In the guide, the compute node requires a provider network connection, and
> the neutron run in controller node.
>
>
>
> But per my understanding, all VMs access the internet via NAT, and the
> nova node has no internet access requirement in production environment.
>
>
>
> Anything I missed or misunderstood?
>
>
>
> Best regards,
>
> Rui Mao
>
>
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