Currently:
I heard from my clients that there is no internet. (Did not receive any other email ==>) So restarting responsible modem, no result.
Starting my computer and see that there is no LAN connection and no pinging my firewall. Finding the reasons I'm surprised that Kerio Control has shut down.

Much better handling:
Adding in 'Accounting and Monitoring\Alert Settings\System alert

Shutdown Alert (with verbose Reason/Log)

There should be ideally enough time to send email to server and server reaching extern mobile device, where one can see the email.

In the email should be
Shutdown (for instance:) Due Intrusion Prevention Engine,
Verbose: Attack on Internet Interface <name> for the IP/Port

This email should be as well logged before the shutdown. Because just Intrusion Prevention Engine is not enough to see what happened.

Say you have one fast but limited uplink and another slower but unlimited uplink. You want to give users a certain quota on the faster uplink before their traffic defaults back to the slower uplink. Could be implemented as an extra source in the Traffic Rules page such as the "users who have exceeded their quota" source available in the bandwidth managment page. That way you could have a pair of traffic rules as follows: "users on fast uplink" with source as "all internet interfaces" just below a rule for "users on slow uplink" with the source as "users who have exceeded their quota"

some changes are required as daily task achivements and need to as we exercise on daily bases and want these thing in new system.
i am using tmg/isa with gfi tools since 2003 quite impressive and effective for proxy and cache work even my tmg/isa server over 2003/2008 are working since 2006 with many time hard power off machines and working as smooth as i want coz i covered many services as i want and not getting any disturbance in it. for many other user users it far difficult to handle but for me its piece of ckae and love tmg version with gfi tools in operations. but few thing as tmg is no longer design and quite becoming weak in https content filter and not full support for its filter content and tunneled connections, that why kerio control is getting good numbers of its control version for firewall/filter/proxy cache work. my first choice is sangfor, mikrotik, pfsense, kerio, tmg/isa.

for Kerio Requirements idea as we want it to be for best fast work:
i also want to have each rule specification reading method as incase one rule was created for (x.x.x.1/abc ip/user) then all relevant rule should be appended under this as tree / group for this (ip/user).
e.g. one is both deny/allow/filer/mac binding rule should be propagated as tree / group of each (ip/user) rule.
second is each traffic rule should be applied without sequencing reading method like first all active and allowed then non-active disabled and in the last all drop.. its cisco method which they have also changed in new IOS. even mikrotik and isa/tmg of Microsoft is not following these sequences of reading.
third is customization is required for all level till logo changes alter we pages either its (deny, filter, security). its is important to present as captivative portal of our company which actually mikrotik & isa/tmg is providing, coz these changes more likely important for admins end to show their user our control and at world wide only admin are which can describe best for your products to use in any industry so somehow even with coding we can do it in your pages also but quite lengthy work so all i want to say if you provide us then also client side dose not need to know how we are getting controlled but here we admin need to show our logo and info on all alerts which even as told above can do on kerio alert pages also but need time to accomplish. only one logo for user authentication was there but rest of pages shows your brand names which i dont want to show them.
fourth is proxy with cache is not effectively working and sometime just stopped and any new http content get stored in it as numbers dosn't change.
antivirus some time stop working so need to restart service.

Positive Points:
Quite effective and handy than microsoft and control of rules quite faster for each change. i also like its cache method but as above changes required.
light and effective to use in industry for firewall / proxy, content filer work.

many thing said which in practical far helpful and could lead this product impresivlly top on all above said brand. coz many things are some point collected from each product as they offered and we liked their work and effectiveness and want those mixture in kerio along with some practically admin using ways of requirements. if i get chance to describe and lead this project to detail work on it for all these areas smoothness then which are in practice giving problem as we faced then after fixing this could be good product which having all major products good elements and best practices in effective operations for daily use of internet in any industry.