Xen users - Nov 2006 - nat via Dom0 using bridges doesn''t work

Hello there,

please helpme! :-)

I have 3 phisical NICs on my machine configured to use network-bridge
script. This is my network designer:
                      ---------------------------------
                     -----------------------
                      |                                        |
                              |  Stations VLAN1  |
                      |                           eth1 <xenbr0> VLAN1
              /  -----------------------
INTRANET <xenbr0> eth0     DOM0            |                >- Switch
-<
                      |                           eth2 <xenbr2> VLAN2
              \   -----------------------
                      |                                        |
                               |  Stations VLAN2  |
                      ---------------------------------
                      -----------------------

Well, I want enable nat via DOM0 for all Stations at VLAN1 and VLAN2
but I don''t understand because this doesn''t work.

ip_forward is enable and iptables nat for all IPs with output via eth0

echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

My Xen files:

------ xend-config.sxp
(network-script custom-network-bridge)
(vif-script vif-bridge)

------ scripts/custom-network-bridge
#!/bin/sh
XENDIR="/etc/xen/scripts"
$XENDIR/network-bridge-0 "$@"
$XENDIR/network-bridge-1 "$@"
$XENDIR/network-bridge-2 "$@"

------ variables in script/network-bridge-0
vifnum=0
bridge=${bridge:-xenbr${vifnum}}
netdev=eth0
antispoof=${antispoof:-no}

------ variables in script/network-bridge-1
vifnum=1
bridge=${bridge:-xenbr${vifnum}}
netdev=eth1
antispoof=${antispoof:-no}

------ variables in script/network-bridge-2
vifnum=2
bridge=${bridge:-xenbr${vifnum}}
netdev=eth2
antispoof=${antispoof:-no}

Any idea?

regards

-- 
Marco Sinhoreli
http://msinhore.blogspot.com

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