The thing to note about Kerio is that it may be a more efficient firewall than ZoneAlarm, but only if you configure it to be so. Most people tend to find the settings Kerio is turned on to at default don't quite cater to their needs and generally fiddle with them until it has been adjusted to their liking. And in order to do that, one really needs to know what he or she is doing because Kerio isn't exactly the most user-friendly piece of software in the world. Yes, it gives you plenty of control over what to block out and what not to, but it also has a tremedous number of options and configurations that can prove extremely frustrating to an amateur.
For that purpose, I'd recommend ZoneAlarm firewall instead. The free version works like a dream and hardly any setting up is required at all, because at default the software has already been set up to meet the general user's needs. Whether it is as good or not as Kerio, I cannot say but it is definitely a heck lot easier to understand and configure than Kerio, and thus inexperienced users are less likely to make a mistake adjusting the options and setting themselves up for more trouble then before, which is one gigantic, important factor in its favor. For me, that is.
Edited by cassykins, 01 July 2005 - 08:00 AM.