Thanks for the replies.
I plan to just use it as a modem, with an Asus AC68U connected to it.
I changed the IP so it can be accessed by my LAN and the password to secure it a bit more.
Anyway to change the telnet password ?
Thanks.
get the modem setup. use a different subnet for example I set my modem ip to 10.0.0.1
then enable and telnet into the asus router and enter these 2 commands. the 2 of 10.0.0.2 can be any number you like as long as it doesn't conflict with the modem, but this is what i use.
ifconfig `nvram get wan0_ifname`:0 10.0.0.2 netmask 255.255.255.0
iptables -t nat -I POSTROUTING -o `nvram get wan0_ifname` -j MASQUERADE
I'm not sure how to use the scripting to make sure the commands get run at startup. you might need Asus merlin firmware for that.