Well, Tech my friend, hehe.
I just installed Kerio 4.2.2, the latest.
So far so good.
Good thing is, it has ability to save configuration, same as KPF 2.1.5, unlike my trusted Sygate.
I am so far sticking to pure application rules.
I did not see the point of importing BZ's packet rules from my 2.1.5 install, since this firewall is so different from KPF 2.1.5.
Only shortcoming so far is that connection log, as I see is not sortable, like in SPF.
Will post in a new thread if any bad experiences happen.
Needles to say on my system is only now installed Kerio 4.2.2.
Some people try to have 2 firewalls installed, stupids.
Not knowing that even if they are not running same time, driver level conflicts can happen.
Hope my post does not upset you NetVeda user's reading this thread, since it is quite far off the topic
Jarmo