I've been using my server for several weeks now and have met my basic needs (SSH access, Greyhole drive pooling, CrashPlan backups from my other networked computers). Now I am adding apps but the DNS names aren't resolving (my home domain is duncan.net and the apps are resolving to a parked domain). I ran the troubleshooter and failed step 4. My results are stored here:
sprunge.us/YicV
I posted this is the newbie section because networking has always been my weak spot.

I've been comfortable with all other aspects of the server but decided to seek expert assistance for networking! Note that I intend to use my router for DHCP for the foreseeable future. The other members of my household are technophobes and if I make changes to the infrastructure (and they fail) then I never hear the end of it. I want to ensure that the server is bulletproof before fully committing to it. Thanks!