NAT-PMP and high availability

[knut]

I am trying to get NAT PMP working on a pair of opnsense boxes in high availability. I have tried setting it up with a minimal configuration but I really can´t seem to get it working. I also tried to setup a VM to test a single device and that seems to have worked.

The two devices is opnsense dec2750 with a business license. it is running 21.10.3, while the vm I tested is running 22.1.5.

It does seem like upnp does work in high availability, but not the nat pmp. Unfortunately tailscale is just running nat pmp.