Re: [Xen-devel] Creating a local network within the GuestOS and r outing to an ext ernal network

[Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>]

> Will this layer 2 switch supplant the current code, or be an addition?

An addition. Xen is being used by a lot of different groups in a
lot of different ways.

> " Xen won't be able to enforce IP firewalling for you, but
> 
> But this is a feature!   We want that external IP layer enforcement.
> For our purposes, full layer 2 network access by any domain is a bad
> thing.

Mike's code also has a concept of 'virtual network'; only hosts
on the same virtual network are visible to each other.

It's probably a fairly simple modification to only allow hosts to
talk to e.g. domain 0, then implement IPv6 firewalling using
iptables in the domain.

The "correct" solution would be to implement an IPv6-capable VFR
in Xen (which is actually very easy), but since this code is all
going to change in the new IO world I wouldn't advise embarking
on such a project right now unless you need it urgently.

Ian


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