At this point of the registration of your domain you're asked to fill in the ip address of the primary and the secondary DNS (domain name server) for you domain.
I don't know if Networking is offering you a DNS service with the registered domain but if they don't you have to fill in here the ip addresses of two other, external, DNS servers. If they offer you dns service you have to fill in their nameserver ip's. Otherwise you can create your own dns records at
www.granitecanyon.comDon't fill in your own e-smith's static ip address! Your e-smith server is only a dns server for your internal network.
Why do you use Networking? GoDaddy is cheaper I think. See
www.godaddy.com (keep in mind that I'm not working for godaddy

)
The easiest way is to register your domainname for only a few dollars at godaddy.com and then setup your own records at the public dns of granitecanyon.com. If you want more specific information about creating your own dns there, mail me.
I hope this is clear now....if not, ask another question

Timothée