How to remotely manage ONT

WAN Access Control Configuration:
1. In the navigation tree on the left, choose Security > WAN Access Control Configuration. In the pane on the right, click New. In the dialog box that is displayed, set the parameters of the WAN access control.

Danger:
Complete network security planning before enabling remote access control to ensure that ONTs are logged in to in secure network conditions. After the ONT login operations are complete, disable remote access control in a timely manner. If you do not complete network security planning or do not disable remote access control in a timely manner, the network may become faulty or be attacked, and Huawei will not be responsible for any related subsequences.

2. Click Apply

https://support.huawei.com/enterprise/en/doc/EDOC1100009120/9f2a7e9b/wan-access-control-configuration

Hello friend！
We do not recommend that you do this, because of network security reasons, you can solve it through other methods
For example, log in using telnet.
Or link a PC on the device site, then use remote desktop software to link to this PC, and then log in to the ONT web page.
Thank you!