The Smart Firewall processes General rules before it processes Program rules. Within the list of General rules, rules are processed in order of appearance, from top to bottom. Program Control entries are not processed in order. The rules within each Program Control entry, however, are processed in order of appearance, from top to bottom.
For example, you have a Program rule that blocks the use of Symantec pcAnywhere with any other computer. You add another rule that allows the use of Symantec pcAnywhere with a specific computer. You then move the new rule before the original rule in the program rule list. Norton Internet Security processes the new rule first and lets you use Symantec pcAnywhere with that specific computer. It then processes the original rule and prevents its use with any other computer.
Norton Internet Security includes a number of predefined general firewall rules. These rules provide network functionality and protection from known Internet risks. Examples of default firewall rules include the following:
Default Inbound ICMP Default Outbound ICMP | Permit all types of outbound and safe types of inbound ICMP (Internet Control Message Protocol) messaging ICMP messages provide status and control information. |
Default Inbound NetBIOS Name Default Inbound NetBIOS | Control the use of the NetBIOS name service and the NetBIOS datagram service that the Microsoft Network uses in file and printer sharing |
Default Inbound Bootp Default Outbound Bootp | Permit the use of the Bootp service. Bootp is short for Bootstrap Protocol, which enables a computer to discover its own IP address |
You can add a new General rule in this window. You can also do the following activities:
Modify a General rule | You can change the settings of a General rule that does not function the way you want. | ||
Turn off a General rule | You can disable a General rule. | ||
Change the priority of a General rule | You can change the priority of a General rule by changing where it appears in the list.
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