The reviews and opinions below are posted by SnapFiles visitors. They do not necessarily reflect our opinion, and they are solely based upon the experience of individual users.
R-Firewall works well. It has a lot of features and it's relatively easy to use: harder than some (ZoneAlarm), but easier than others (Jetico). At setup, it detects some commonly used programs on your machine and offers to configure the firewall around these, making interruptions less frequent when first using it. I've also noticed that it will even prompt whether to use certain .dll's and plug-ins, such as the first times I accessed a browser page with Java-- R-Firewall prompted me for each java .dll. Another time, I watched an embedded Windows Media movie and was similarly barraged with prompts, which I actually found useful and was pleasantly surprised that it was checking things on that level. In addition, it uses relatively little resources (about 10-14 MB of memory) on my aging machine. I'm not sure if this is the most secure firewall out there, but it is the best for my purposes.
Softperfect is an excellent packet filter. It doesn't offer the protection that an application-level firewall can provide, but conversely it uses very little resources and CPU time. (On average, I found that it used only 4-5 MB of memory and about an equal or slightly higher amount of virtual memory.) It's extremely easy to use. When you set it up, you specify which types of presets you use and allow (email, p2p, IM, FTP, etc.), and these can be changed easily later on as well. I believe that more advanced rules can be set, but I never tried this. As stated though, there is no application-level firewall, so outbound packets aren't monitored if they use a standard port. But as an easy-to-configure packet filter, I recommend it.
Comodo Firewall works very well. It's one of the better firewalls out there, and it's free to boot. I found it easy to use.
However, it uses more memory than some other firewalls and occasionally it used a lot of CPU time, slowing down my computer (it would use 60% of the CPU at times for unknown reasons). This recurring problem led me to remove it eventually and reluctantly. :-( If you have a newer machine, this might not be an issue.
Nonetheless, I recommend it, and hopefully you won't run into the same problem that I did.
prevent accidental installations of third party offers
convert video and music files between formats
play magnet links and torrent files instantly
streaming media server
Email Archiving and Email Backup
network and server monitoring