[Xen-users] Routing problem in bridged setup

[Pepe Barbe <elventear@xxxxxxxxx>]

Hello,

I am having some routing troubles with my Xen setup.

I have two domUs, one running as a firewall and another running as a  
dmz:
The dom0 has the following:
- eth0 bridge (10.0.0.3/24)

The domU-firewall has the following:
- Direct passthrough PCI NIC (Public Internet)
- Virtual NIC connected to the eth0 bridge on dom0 (10.0.0.1/24)
- Bridge called brdmz for the dmz zone (10.0.2.1/24)

The domU-dmz has the following:
- Virtual NIC connected to the brdmz in domU-firewall (10.0.2.2/24)

So far can I can make the domU-firewall and domU-dmz talk to each  
other without problem. Using IPTables/NAT on domU-firewall I can route  
to the public internet from dom0/Local Lan and from the domU-dmz. But  
I can't communicate from the domU-dmz to local lan and viceversa. I've  
made sure that there are no IPTables rules blocking this kind of  
traffic, so all I am left is with the possiblity of a routing problem:  
domU-firewall not forwarding packets from the local lan to the dmz  
bridge for some reason.
Anyone has any idea of what could I do to troubleshoot this problem?

Thanks,
Pepe

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