Is there a way to set this up? On the Dynamic DNS setup screen they have a pulldown with a list of providers and Dynu is not on the list. All I can specify are, hostname, user name, password, and provider.

Does the list of providers have 'custom' option?

I'll answer this (because I have the same router and the same question) - no. There is no custom option. I talked to Fios tech support last night and the four they offer are the only options. Three of them are paid services, and the fourth offers a free service, but to get the domain listed in the pull down, I have to become a subscriber. The domain in question is consider one of their "premium" offerings, and charge appropriately to get it.

So, I'm hoping there is a way to put another router, with support for dynu, behind my fios router.