block port 80 in AP mode?

[ldeveraux]

I have an AC68P in AP mode with 3 or so client routers attached to it. The AC68P is wired into my Verizon Actiontec router with DDNS. Everything works the way I want it to and the DNS works fine (the Actiontec has the DNS info). My problem is with security, when I type my DDNS address into an external web browser, it takes me to the AC68P login page. I assume this is because something is forwarding port 80 along, but I can't figure out what it is. Is there a way to keep my access point mode and disable the remote administrator access? This seems very insecure to be able to type in my addy and the router login page pops up...

Thanks for the advice!

Edit: I forgot to mention I'm using the latest Merlin firmware 378.53