In order to leverage 2.5Gb bandwidth of NURO 光, I ordered スマートライフ option to get a 2.5Gbps compatible router(NSD-G1000T). However, I met same MAP-E issue as many mentioned.

I could change the router admin pages JS to enable the save button for the DMZ, port forwarding and port mapping, but it actually not work.

Port Mapping config on NSD-G1000T
I could change the status of button to add new config, but they’re not working.

Even I just got partial IPv4 port range, I should be able to use the ports I got. But seems the firmware just disabled the config(?).

But I found the local net’s IPv6 response to ping from the public network(And it is the actual machine). So maybe I could try this.

Though I could serving the local services with wireguard, but still feel uncomfortable with the fact that I can’t use any IPv4 port.

BTW also found a very long issue thread on GitHub, If I have patience to try to replace the ONU, maybe it also possible to set the DMZ & port mapping. And if it’s possible maybe I’ll consider a x86 OpenWrt solution since it’s easier to test & debug.