Hello, I know this may be a silly question, but I am a little confused. Should I be using a software firewall? I have a nat router with a built in firewall. I currently use the Windows XP firewall. I have used another software firewall before, but it was very heavy on the resources; so I uninstalled it. I did scans online and my computer is always stealthed with or without the software firewall. I heard that I could just use windows firewall, since I have the nat router with firewall. Is this true? Thanks, Danny.