Multiple Dynamic DNS with NameCheap?

[JoQ]

Hi,

Just switched to NameCheap from asuscomm as I had not choice to be able to use my domain.com adress (without www. or subdomains).
I was able to do this, by entering Host name: @ and then Domain name: domain.com
Works fine, but if I add more Dynamic DNS's to the namecheap settings, like test.domain.com, this will not get updated with my IP, as I only have the @ under host name.

Is it possible to include all the names in the Asus settings?

I have an AC68-U.

Another thing, what does "WAN IP and hostname verification" do? Should I have it on or off?

Thank you!