[CentOS] Virtualization Networking

Fri Sep 30 02:54:15 UTC 2016
TE Dukes <tdukes at palmettoshopper.com>

> -----Original Message-----
> From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On
> Behalf Of Gordon Messmer
> Sent: Thursday, September 29, 2016 11:47 AM
> To: CentOS mailing list
> Subject: Re: [CentOS] Virtualization Networking
> On 09/28/2016 08:43 AM, tdukes at palmettoshopper.com wrote:
> > I have one of those free domains/DNS from no-ip.com,
> > centos7vm.ddns.net I plan to use as the host name.
> >
> > I want to be able to access this VM from the internet.
> ...
> > This is what I was seeing. Either it lands on the DSL router's login
> > page or the host's website.
> If you only have one address, you'll need to configure port forwarding or
> "bastion host" from that DSL router (whatever it supports).  Your
> address will simply point at that host.
> > So, how much in the network setup for the new installation do I need
> > to do? Do I need to go with NAT or bridged?
> You have a couple of options for VMs that you want to access from the LAN.
> The best documented and probably most widely used is bridged.
> That one also probably requires the most setup:
> https://access.redhat.com/documentation/en-
> US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/ch-
> Configure_Network_Bridging.html
> https://access.redhat.com/documentation/en-
> US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Ad
> ministration_Guide/sect-Network_configuration-Bridged_networking.html
> You can also use macvtap, which doesn't require the use of a special
> interface, but you do have to enable hairpin mode if you want the KVM
> guest to be able to access its guests.  I honestly can't find much useful
> documentation.
> https://access.redhat.com/documentation/en-
> US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/
> sect-attch-nic-physdev.html

Thanks, I am running 6.8. 

For whatever reason, the default NAT setup no longer works. I got some kind
of bridge network (mactap) setup that has access to the outside but I still
can't connect locally.