Hello, friend!
After confirmation, it is found that port forwarding or DMZ cannot be configured on the OLT using commands or the U2000.
This is a feature supported by the ONT hardware. You can log in to the ONT WebUI to configure port forwarding and DMZ.
There are many introductions on ONT port forwarding and DMZ configuration in the forum. You can visit the Access Network forum to obtain the information. If you cannot find the configuration description, you can leave a message in the comment area. I will reply to the description of the configuration.
For more information about Huawei ONTs, click:
All about Huawei ONT
Thanks!