Create a network with automatic IPv6 addresses and start the management access service (likely ssh) on the zt0 interface. then it "just works", regardless of NAT in between.
This is a completely userland solution however. You probably don't want to put real service traffic on it if you care about throughput. It's perfect for management however. (or just test it, maybe you can saturate your link anyway)
This works either by using the public servers for discovery, or you can set up your own dedicated endpoint(s). Either way, the traffic takes the direct route through the NATs, or within the local netowrk if possible.
Zerotier is a great solution. I've been using it for a few months now.
I can't say if it is right for businesses, or services, but if you just need to be able to connect to any of your devices, from any of your devices, no matter where you are; then zerotier works wonders.
Sadly I can't seem to get it to compile under OpenBSD.
Create a network with automatic IPv6 addresses and start the management access service (likely ssh) on the zt0 interface. then it "just works", regardless of NAT in between.
This is a completely userland solution however. You probably don't want to put real service traffic on it if you care about throughput. It's perfect for management however. (or just test it, maybe you can saturate your link anyway)
This works either by using the public servers for discovery, or you can set up your own dedicated endpoint(s). Either way, the traffic takes the direct route through the NATs, or within the local netowrk if possible.