Orbi internet access from different IP ranges

[faxfan2002]

The connection is -

Internet -> Orbi -> Switch -> WAN Checkpoint 1550 LAN -> Device

The orbi, switch and WAN checkpoint sit in the 192.168.1.0/24 range. The Checkpoint LAN range is 10.146.1.0/24.

The orbi has a static route to 10.146.1.0/24 via the WAN checkpoint.

If I do NOT NAT at the WAN checkpoint there is no internet connection - essentially it seems the orbit is only NAT'ing the 192.168.1.0/24 range and nothing else. If I use an draytek (not using it as the WAN throughput is lower than the orbi) it works fine without NAT'ing. 

Any ideas how to get it working?

[FURRYe38]

Contact the Mfr of that WAN Checkpoint device. 

Put the WAN checkpoint device IP address it gets from the Orbi into the Orbi's DMZ. 

[faxfan2002]

Thanks, marking the checkpoint as the DMZ didn't work, still need to NAT. Just to be clear this issue is NOT specific to the checkpoint, I can swap the checkpoint for cisco device and have exactly the same issue. HOWEVER if I swap the orbi out for, example, a draytek or cisco device it works.

I assume Orbi is dropping traffic that isn't part of it's "LAN" range.

[FURRYe38]

What happens if you use the Orbi system in AP mode?