For the Japan model BE900, the port forwarding feature is unavailable when enabling v6plus or MAP-E (OCN). However, port forwarding is possible (with specific port ranges) on many Japanese ISPs with a

The v1.1.1 firmware for the BE900 (available at https://www.tp-link.com/jp/support/download/archer-be900/#Firmware) renders the router unusable for Japanese internet providers. In Japan, we rely on VN