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Re: [Xen-users] XCP and Amazon EC2-style networking

To: Grant McWilliams <grantmasterflash@xxxxxxxxx>

Date: Mon, 15 Mar 2010 11:37:33 -0700 (PDT)

Delivery-date: Mon, 15 Mar 2010 11:38:48 -0700

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List-id: Xen user discussion <xen-users.lists.xensource.com>

Yes, and also the ability to specify fine-grained firewall rules on the public address.

From: Grant McWilliams <grantmasterflash@xxxxxxxxx>
To: C V <rayvittal-lists@xxxxxxxxx>
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Sent: Sun, March 14, 2010 4:46:02 PM
Subject: Re: [Xen-users] XCP and Amazon EC2-style networking

On Sun, Mar 14, 2010 at 12:30 PM, C V <rayvittal-lists@xxxxxxxxx> wrote:

On EC2, each instance (Xen DomU) gets an internal IP address (usually 10.x.y.z) and also a public IP address which is NAT'ed to the internal IP address. I am assuming that this NAT happens in Dom0.

In XCP, the DomU VIFs are directly bridged to the physical network -- this would be the internal IP equivalent. I don't see any equivalent way to NAT the public IP address to the internal IP address. With xend-style networking it may have been possible to use network-nat or perhaps network-route
vi /etc/xen/xend-config.sxp
(network-script network-route) 
#(network-script network-bridge)
#(network-script network-nat)

Is it possible in XCP?



Thanks
--
CV

So really all you want is for your public IP to be routed to your vif and back?

Grant McWilliams

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