RAX120 Connectivity Issues

The known issues as outlined in the KB you referenced: "problems with playing online games, opening a specific service port, connecting to a VPN tunnel, or visiting secure sites with SSL" are not problems that I'm having.  I'm having fundamental DNS issues, that did not previously exist up until some random moment the other day at which point it will only resolv lookups temporarily after resetting the router.  Bypassing the router address as the DNS resolver manually circumvents the issue, connecting direclty via an IP address instead of hostname circumvents the issue.    I specifically inserted this device into my topology so that I could have configureable DNS from the DHCP service, as opposed to from my Internet provider as they do not allow customizeable DNS servers which is something I require.

Removing the double NAT topology is not going to allow me to do what I bought the device for. Has nothing to do with my not willing to try a configuration, but it needs to be a configuration that will work for the reasons that I bought the device in the first place.  It clearly is an issue with the Netgear and DNS service it is providing proxy pass-through to.