VM can ping GW but not receiving traffic

[merlin]

I'm having a bit of trouble getting communication to work on our ProxMox server setup. We have 2 NICS installed, and currently have 2 VM's. One VM is our spam server and runs fine, gets traffic in and out, no issues. It is connected to VMBR0 with 1 NIC. The other is a Znetyal server, that currently is not being used for a gateway, but only for Ntop to monitor our inbound and outbound internet traffic for bandwidth and traffic usage.

The Zentyal VM is set up with 2 NICs and works fine as a standalone hardware device. I took an image of the standalone device and moved it to a VM, and it works except it doesn't get traffic in on the monitoring port. I tried a fresh install of Zentyal and then ntop to see if that fixed it and still no luck.

Our PVE server is running on Eth0, VMBR0:
IP - 10.1.10.60
SN - 255.255.255.0
GW 10.1.10.1

Spam server:
IP - 10.1.10.70 Eth0 on the VM
SN - 255.255.255.0
GW - 10.1.10.1

The traffic server(Zentyal) is configured as follows:
Eth0: - network for configuring the server and accessing the software(VMBR0)
IP - 10.1.10.30
SN - 255.255.255.0
GW - 10.1.10.1

Eth1VMBR1) - Traffic monitoring port - Vlan 1 on a Cisco ISA 550 in port mirroring mode
IP - 10.1.1.50
SN - 255.255.255.0
GW - 10.1.1.1

I used iproute2 to set routing for each interface and routing works, I can ping both gateways, but no traffic comes in from the switch on Eth1.

Any thoughts or suggestions would be appreciated?

Thanks,