port forward trusted?

i was going to buy and DL PFConfig so i can make port will it give me a virus? and do u have it?port forward trusted?
If you have a router just go into the router and manually setup the ports for whatever range you want, and as getting a Virus, only happens if you open or download something that looks suspicious, your ports are open, and somebody can scan for the open ports and attack you then, just keep your spyware and stuff like that updated, and to be extra safe turn off the ports when your done