um...if you are looking for a free good firewall that can be password protected so that your clients cant turn them off then i would say you should download Kerio, go to www.download.com and searh kerio, its a 30 day trial...for the pro version, but the firewall is free, the pro version only include things such as ad-blockers, nothin much, but the firewall is great, and can be password protected, hope that helps