Een lijst met gratis te downloaden firewalls voor Windows:FREE Firewalls for Windows
"After the success of ZoneAlarm dozens of new firewall software programs are published every year. Only some of them are worth your time and your money. Especially for private and non-profit organization many excellent products are available for FREE. This web site attempts to list, test and rate the best FREE firewall products for Windows. This is a FREE service of iOpus Security and Internet Software."