I have 2x 1Gbps WAN connections and trying to load balance them so that I can achieve 2Gbps nominal. My main router is a ubiquiti UDM-Pro and although it will load balance, it will not exceed the max speed of 1 port (Confirmed by months of support requests and testing). If at all possible, I would like to make the device as transparent as possible for things like Port forwarding, firewall rules, etc.
I went the opnsense route. I have a device configured with WAN LB enabled. When directly connected to the router, it works fine. But when i get behind my udm pro, no internet. Im connected from WAN port on UDM to LAN port on opnsense router. Using 192.168.2.x whereas my udm is 192.168.1.x (255.255.255.0 subnets on both). I have dhcp set up on the opnsense but the udm wont pull an ip. Is there a thing with private ips on the WAN port on UDMs?