Hotbrick LB-2 Dual WAN Firewall – One To One NAT
I bought a Hotbrick LB-2 firewall a few years ago with the intention of setting up a dual-WAN with fail-over. The idea is that we would have two internet connections and if one went down, the other would take over.
The device works in that capacity with one exception: One to One NAT.
One to One NAT is required in order for each of my servers to use a different Public IP address. This term is not mentioned anywhere in the documentation or in Google searches for this topic. So the device has been sitting dormant on the shelf for two years.
Today I figured out how to make it work. As with most things on this router, it is not straight-forward at all. It goes against every conventional router configuration. But it seems to work in limited testing.
1 – Set up a DMZ entry
Advanced Configuration, Multi DMZ
Create a record with your Public IP, Private IP, and assign a security group.
2 – Configure Security Group
Click Security Management, Access Filter
Select the Group from step 1
Select Allow Selected Access Only
Configure the correct ports to open at the bottom of the page.