If you don't want to worry about port forwarding or your just out of slots on your forwarding page you can do the following:
Setting up a static LAN ip helps insure the forwarded ports are forwarded to the correct LAN computer on the Network. Using DHCP your not sure which pc will recieve 192.168.1.100. Depends on which computer is restarted and gets tricky. I recommend setting up a static LAN ip on your pc something below 192.168.1.100 and higher than 192.168.1.1. If you don't use something lower than 100 then you are in the DHCP range, If you don't use something higher than 192.168.1.1 your using the Router config IP. I use 192.168.1.10 and 20 for the next you can even use 7 then 10 or 2 then 3, just don't try using the same LAN ip with computers connected to the same Router.
Next forward the ports to your static LAN ip if you like the safety of being behind a Firewall/Router. Otherwise put yourself on DMZ host which is just like not having a Router but I myself don't even use Norton anymore. It's annoying how it takes over your pc, and reminds you about stupid updates. It's a waiste of time if you have a Router. I have no problems while being on the DMZ host. Don't think any of you would either. I think there are still some safety being behind the Router on DMZ. I could be wrong.