[Xen-users] Debian Etch, Xen 3.1.0 and multiple networks

[Jock Coats <jock.coats@xxxxxxxxxxxxxxxxx>]

Hi there, I've been tearing my hair out for ages with this and still  
haven't got it to work:
I have Xen 3.1.0 running on Debian Etch (I used the Howtoforge  
document at http://www.howtoforge.com/debian_etch_xen_3.1 which worked  
great, though I suspect I messed things up a bit by trying to second  
guess the NATting and now I can't see any nbetwork from any of my  
DomUs).  Anyway, I've done trawls through the web and this mailing  
list, and whilst I am sure my answer is out there I just do not  
understand what I am trying to do - despite buying two very good books  
on the subject as well so I hope someone here can help...
Dom0 has one ethernet card.  My hosting company has allocated me three  
public IP addresses.
I have five DomUs - zimbra.jcsolutions.co.uk,  
backups.jcsolutions.co.uk, database.jcsolutions.co.uk,  
files.jcsolutions.co.uk and web.jcsolutions.co.uk
In layman's terms I need zimbra to be visible to the outside world  
with its own one of the three IP addresses (it needs to have an MX  
pointing to it and a pointer record to enable it to become my main  
mail server).
...and the others I need to be able to see each other, and to allow me  
to do port forwarding mainly just for web requests to be forwarded to web.jcsolutions.co.uk 
, but also possibly SMB forwarded to the files machine.  Backups needs  
to be able to see the outside world so I can send copies "offsite".
From what I can work out I therefore need a "bridge" between one  
cloned interface on Dom0 and zimbra and the rest of them can be  
"NATted" with the relevant ipforwarding rules on Dom0.
eth0 is how I get to the Dom0.  I would like something like eth0:1 to  
be bridged through to zimbra and eth0:0 to the other machines on the  
private VLAN.
Does that make sense?  I hope so, then at least I'm describing the  
right scenario.
But I've read the notes on the "network-multinet" script and cannot  
work out what to do - it seems to be the sort of thing I should be  
using (or writing a script of my own I suppose).
Can anyone please assist, preferably in words of one, non-technical  
syllable.  I gave up on Xen on Monday because of this issue and  
started using VirtualBox, but then returned to the fold for other  
reasons, but I've been struggling with this off and on for about two  
months in my spare time and I'm now absolutely desperate.  It might  
even be worth a small amount of "beer money" if someone can help as I  
now only have a day left off work to get this up and running or it  
will maybe linger on another month (together with another onth's  
charges for my current machine I'm trying to migrate from!).
TIA,

Jock Coats
--
Jock Coats
Warden's Flat 1e, J Block Morrell Hall, OXFORD, OX3 0FF
local rate: 084 JOCKOXFD (56256933) skype:jock.coats?call
jock.coats@xxxxxxxxxxxxxxxxx http://jockcoats.org.uk






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