> Any starting points or clues? I'm not totally up to snuff on DNS > configs, hoping to learn.
I found a program on http://freshmeat.net called dnsmasq. It is a small dns proxy, that uses your /etc/hosts file to server DNS on your lan, and uses the resolv.conf to work out where you isp's name servers are. If you run this on the linux box, and tell the openbsd box that this is the dns server, assuming the linux box can do its own dns lookups successfully, this should get the effect you desire. Just put the doubleclick.net stuff in your /etc/hosts file on the linux box. Jason