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Hi there

I'm using a TL-MR6400 as 4G router for my home.
I would like to connect my nas behind this router from the internet.
I added the port to forward in this router forwarding section, but I still can't access my nas.

I noticed the router shows a private WAN ip, like 10.x.x.x. It doesn't make sense.
When I check my public IP from https://www.whatismyip.com, it returns a true public IP.
Why is there a difference?
I guess it's because the router use a private ip for some reason that I couldn't reach my nas from the internet.

Is anybody here who managed to solve this issue?
Thanks!