I am renting a wireless router with cable connection from my local ISP.
I want to setup my Buffalo 300nh router with dd-wrt before returning the ISP's wireless router.
Is this possible for me to do? i.e. can I connect directly to the 300nh, wipeout the existing firmware with dd-wrt and make sure everything is working before returning the ISP's router?
Is it possible to test it live by connecting a cable from the ISP router to the 300nh for internet connectivity?