I registered for and used the DDNS at asuscomm.com when I used AiCloud, AiDisk, etc. with my then new Asus router. I also had my security cams accessible from the WAN.
But there were many dubious people trying to access my network via my IP, so I disabled WAN access.
I tested with GRC ShieldsUp, and the IP looks secure now.
My DDNS entry still resolves to my current WAN IP address, but AiProtection is not reporting exploit attempts like it used to.
So I'd say the Asus DDNS lookup was not the security loophole; leaving my IP address accessible from the WAN was.
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