asus ac5300 what is asusnat tunnel and what is its purpose

[wiz]

I recently bought an Asus ac5300. Under the tools section under advanced tweaks and options there's an option " Disable asusnat tunnel". Default it was switched on, but if I do not know what it does my first instinct is to have it switch off.

What is the asus nat tunnel, and what does it do? I tried searching the forum but could not find any details about it.

 

[wiz]

Found some obscure info that this has something to do with ifttt. But in order to use that you have to enable web access from wan. No way that this is ever going to be the case on my own router. So I do not miss anything as I do not want alexa or ifttt to control my router via the wan interface. Come to think of it, I do not want them to control my router at all.