Using Rules - Check Point UTM-1 Edge User Manual

Using Rules

Using Rules

The UTM-1 appliance checks the protocol used, the ports range, and the destination IP
address, when deciding whether to allow or block traffic.
User-defined rules have priority over the default security policy rules and provide you with
greater flexibility in defining and customizing your security policy.
For example, if you assign your company's accounting department to the LAN network
and the rest of the company to the DMZ network, then as a result of the default security
policy rules, the accounting department will be able to connect to all company computers,
while the rest of the employees will not be able to access any sensitive information on the
accounting department computers. You can override the default security policy rules, by
creating firewall rules that allow specific DMZ computers (such a manager's computer) to
connect to the LAN network and the accounting department.
The UTM-1 appliance processes user-defined rules in the order they appear in the Rules
table, so that rule 1 is applied before rule 2, and so on. This enables you to define
exceptions to rules, by placing the exceptions higher up in the Rules table.
334 Check Point UTM-1 Edge User Guide