Hi @kyson-lok,

It’s not a problem with the LAN device.
It’s a simple device without particular functions except setting the IP address.
In fact, I can reach it but only If I connect to the wireless LAN of the GL-MT300N-V2.

Connecting to the Wireless, my client obtains an IP address (172.16.0.X) and I’m able to type 172.16.0.1 and see my LAN device interface.

It’s like the firewall does not route from WAN to LAN and VPN to LAN.