CNET's Jason Parker said: "Your PC needs a firewall. Kerio Personal Firewall is a solid firewall program that provides protection similar to ZoneAlarm's. It has both paid and free versions like ZoneAlarm does, and the free version works great."

PC Magazine gave the Kerio Personal Firewall a "Very Good" rating with 4 Stars and a conclusion of "good protection". Real users like you at download.com give the Sunbelt Kerio
Personal Firewall even 4.5 Stars.

And here is a quote from PC Magazine's reviewer Neil J. Rubenking who said in a recent review on their website: "Kerio Personal Firewall 4 was the best in this roundup. Its users can choose moderate program control with no pop-ups, or unusually powerful protection after an initial spate of pop-ups."

Gibson Research Corp's CEO, Steve Gibson, a well known security expert, said about Kerio: "In an earlier podcast, I referred to two firewalls I liked a lot, and that's Tiny and Kerio. I did some research with my Leaktest freeware, and from looking at all the firewalls out there, my two favorites were Tiny and Kerio"

http://www.sunbelt-software.com/Kerio.cfm