[gentoo-user] KVM networking help

[gentoo-user] KVM networking help

[Nilesh Govindrajan]

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Hi,

I need some help settling up networking with KVM machines.

I have one public interface with four publicly accessible IPs.

I want to run a private virtual network for the VMs, such that every VM can
access every other VM and host, also host can access every VM (required for
NAT).

So far I tried this:

Create two tap interfaces.
Add them to a bridge
Assign IP to bridge
Set different MACs for VMs' NICs.

This let's me access one VM to another also VM to host (not sure about
this, ping works).
But I'm not able to use host to VM (ping works), I'm not able to connect to
sshd running inside VM from host.

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Re: [gentoo-user] KVM networking help

[Alon Bar-Lev]

On Wed, Jul 17, 2013 at 9:28 PM, Nilesh Govindrajan <me@nileshgr.com> wrote:
>
> Hi,
>
> I need some help settling up networking with KVM machines.
>
> I have one public interface with four publicly accessible IPs.
>
> I want to run a private virtual network for the VMs, such that every VM can access every other VM and host, also host can access every VM (required for NAT).
>
> So far I tried this:
>
> Create two tap interfaces.
> Add them to a bridge
> Assign IP to bridge
> Set different MACs for VMs' NICs.
>
> This let's me access one VM to another also VM to host (not sure about this, ping works).
> But I'm not able to use host to VM (ping works), I'm not able to connect to sshd running inside VM from host.

See if the following[1] helps.

[1] http://alonbl.tropicalwikis.com/wiki/Gentoo/VM_Tap_Networking

Re: [gentoo-user] KVM networking help

[William Kenworthy]

have a look at openvswitch ... gives more flexibility and is relatively
easy to use.  I am using fake-bridges with vlans for something like this
(mythbackend running in a vm on a media vlan with a hdhomerun and other
frontends, and a public vlan for other traffic)

BillK

On 18/07/13 02:28, Nilesh Govindrajan wrote:
>
> Hi,
>
> I need some help settling up networking with KVM machines.
>
> I have one public interface with four publicly accessible IPs.
>
> I want to run a private virtual network for the VMs, such that every
> VM can access every other VM and host, also host can access every VM
> (required for NAT).
>
> So far I tried this:
>
> Create two tap interfaces.
> Add them to a bridge
> Assign IP to bridge
> Set different MACs for VMs' NICs.
>
> This let's me access one VM to another also VM to host (not sure about
> this, ping works).
> But I'm not able to use host to VM (ping works), I'm not able to
> connect to sshd running inside VM from host.
>