Right now, I am doing an incorrect thing; I have three domains pointed at that dynamic IP. They are registered with and controlled through dyndns.org, so that if Comcast decides to change my address I can bring up the dyndns webpage and change the addresses. Annoying but livable. This is incorrect because the Comcast terms of service (TOS) forbids my running servers, and incoming SSH, SMTP, and HTTP are responding to requests. Theoretically, they could block these ports tomorrow and I would have no recourse.
I am transitioning to the Correct Way. A local company, pdxcolo.net, rents User Mode Linux virtual machines for $20/month. Over the next month, I will be moving my services to the pdxcolo "machine", and connecting them to SSH tunnels *outbound* from my firewall. There will be no incoming services to my firewall. I will send most of my outbound mail through smtp.comcast.net, not through pdxcolo, to keep bandwidth through pdxcolo down. There are some details omitted, but I hope to describe those at www.keithl.com/comcast.html as I learn more.
Your details with Telstra may vary, but this should give you some ideas.
There is nothing specific about Fedora versus earlier versions of Redhat, beyond the details of configuring iptables. It looks like
Fedora straight out of the box does a decent job of setup.
Keith
Thank you everyone that provided me with good info and suggestion. I have looked around for information too and looks like there should be no problem to get it working. Hopefully soon I will be up and running with cable connection. At the moment I have had small LAN set up and sharing dial up internet connection.
Alimin