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Allowing public IP through Sonicwall NSA 2400

I have been tasked with setting up a ATM on our network. This ATM will have its own router that will utilize one of our public IP addresses. The ATM router will have to be placed behind the Sonicwall due to placement. This is where I get lost.

From what I understand I need to create a VLAN on the Sonicwall for the ATM address object. Then I need to create the vlan on the respective switch that the ATM Router will communicate with. I did this but cannot get the traffic to go through.

The public IP that I am going to use is not on the same subnet as our WAN IP if that makes a difference.

I'm sure I'm missing details but just let me know what you need and I will try to get it.

Thanks!
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Chris H
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Sounds like the Sonicawall isn't wearing the Public IP address for the ATM.  I've never seen an ISP assign two separate subnets to one circuit, but I know it can be done.

So your main internet connection comes in and wears two separate subnets, and your sonicwall supports rounting between the two?
SOLUTION
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Chris H
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Using another IP out of different IP space made it possible for the ATM to be on its own outside of our network.
I convinced our ISP to give us more addresses so this could be possible.