alm4rr points out---ver 3 is a madhouse ... check out the comodo forums for the ver3 scoop...
I am now using comodo 3 with no real problems. alm4rr might also check out the firefox forums where some users always claim each new version is an unmitigated disaster. Even though the vast majority of people are having no problems.
But in terms of history, and after a year of beta testing, the initial public release versions
of comodo3 in the form of versions 3.0.13.266&268 found a huge variety of unanticipated problems. Within 2 weeks most of those were fixed in version 3.0.14.273 which was an temporary version. Then a permanent fix came out with version 3.0.14.276 which is now incrementally upgraded to the current version of 3.0.15.377.
But that seems to be the modern trend in firewalls. Combining the traditional role of a firewall but adding HIPS, process control, and white and black lists. Or as they put, they try
to add prevention.
Both the free version of online armor and CPF3 are designed that way. Online armor is a more simplistic implementation and CPF3 tends to be more of the geek version thats far harder to learn all of the potential settings. I have tried both and they are both fairly non intrusive, easy to train, and both are being constantly improved. To me, advantage CPF3 because it has incremental updates. And because both are freeware, double your money back is not a viable option.
For those thinking of trying ether online armor or CPF3, that choice may be OS specific. Both work with win XP but last time I checked, CPF3 works with vista and online armor does not. But online armor works with server 2000 and CPF3 does not.
Although the link is dated and does not include CPF3, I will resubmit the following link so that others may evaluate how their current firewall rates.
http://www.matousec.com/projec....php#firewalls-ratings