Intelligent Firewall, enable it will protect connection to the last second. Hacker may use a number of infected computers to send out attack signal on your server within a minute. The accumulated or excess request on computer will causing the application server fail to response, as a result of service deny (DOS Attack).
How does intelligent firewall work:
1. statistic all distinct ip connected.
2. record individual ip connection count.
3. if concurrent total connection almost over max. connection (ie. 1000), Intelligent Firewall will take action, record the unreasonable access ip to IP Security System Service
4. IP Security System Service is a powerful security module since Windows 2000. There are different program/exe needed to download according to different O/S.
5. If no Intelligent Firewall, you need to manually add hacker ip on IPSEC or firewall. It is a hard mission.