Untangle protecting multiple external IPs

I've searched around for this for a while now, and either I've missed what I was looking for, or it's not there, probably the former.

I have a T1 currently with one static IP, but I'll be adding an additional 5 IPs. I'm looking to have untangle protect all of them.

Data is provided by a cisco IAD 2400, and routers are assigned IPs statically.

How do I go about putting untangle outside of multiple networks and still allow untangle to access the internet for updates and the like?

Can I have it sit in bridge mode between the IAD and a switch, and provide it with network access via a 3rd NIC inside of an IP with access to the internet?


Any help will be appreciated.

I've been looking over one to one NAT, but it looks like I'd still have to assign an external IP, and have untangle in router mode to be able to provide it access to the internet.