Kool Firewall is a simple firewall for windows designed to monitor the traffic into and out of your system. Within the scanning window, you may see traffic through various ports such as 110 (pop3), 80 (web) and a few others. Kool Firewall has built-in algorithms to detect malacious or unauthorized access to your computer. When such hazard happens, it reports the alert in a 'Possible Attacks' window and also allows you to save it to a log file. New features include protocol driver level protection, enhanced logging, user selected scan delay, kill on demand, save attack log and more. Kool Firewall is an excellent free simple firewall for windows 7.