Uhm, i dont think that smoothwall has 113 open by default. How is smoothwall connected to the internet? Are you behind a modem/router? If so, then the grc scan will pick up the modem/router instead of smoothwall, resulting in the modem/router having port 113 open. I just finished setting up a smoothwall for a client 3 days ago, and there were NO open ports on the RED interface by default.