UPNP protocol information:
- https://wiki.mikrotik.com/wiki/Manual:IP/UPnP
- https://kodi.wiki/view/UPnP
Maybe we should consider supporting UPNP on Vyos
We can consider introducing `miniupnpd`
- https://mirrors.zju.edu.cn/debian/pool/main/m/miniupnpd/
The implementation must rely on miniupnpd based on the nftables back end (which means we need to build miniupnpd ourselves)
There seems to be a miniupnpd_nftables available at the above Debian image address