Hi -
I think you need to look at the problem slightly differently. Specifically:
1. You really have *two* separate, independent issues:
a) How to use your domain name and your static IP so that people on the Internet can find you
... and ...
b) How to configure your workstation and your server in your home so that they can find each other
2. You absolutely need a firewall (I'd recommend a hardware firewall) to protect your internal network from the outside world.
3. Your internal network (the two PCs) will have one IP address (192.168.x.x is a good choice).
Your static IP will be a completely different address (the one given to you by your ISP).
Your firewall will forward packets addressed to your static IP into your internal (e.g. 192.168.x.x) number.
4. Most of what I just said falls under "a)" (how do you configure your network to safely/securely provide one or more network services over the Internet).
"b)" (how do I find things inside my home LAN) is really easy. You just edit your /etc/hosts file, or you use DHCP and let DHCP set up your internal name resolution for you.
There are lots of great tutorials and "howto's" available. In addition to links suggested by the previous poster, here are a couple of other examples:
http://www.swerdna.net.au/linux.html
http://www.linuxhomenetworking.com/w....php/Main_Page
But please, before you start making use of your new static IP, familiarize yourself with:
a) Basic TCP/IP network concepts
b) Basic firewall concepts
'Hope that helps .. PSM