When you create a new Firewall policy, the policy includes several default rules. You can modify one or multiple rule components as needed.
The components of a firewall rule are as follows:
The action parameters specify what actions the firewall takes when it successfully matches a rule. If the rule matches and is selected in response to a received packet, the firewall performs all actions. The firewall either allows or blocks the packet and logs or does not log the packet. If the firewall allows traffic, it lets the traffic that the rule specifies access the network. If the firewall blocks traffic, it blocks the traffic that the rule specifies so that it does not access the network.
The actions are as follows:
The firewall allows the network connection.
The firewall blocks the network connection.
The Mac client firewall monitors packets but does not log them.
This note applies only as of 14.2.
When the firewall evaluates the rule, all the triggers must be true for a positive match to occur. If any one trigger is not true in relation to the current packet, the firewall cannot apply the rule. You can combine the trigger definitions to form more complex rules, such as to identify a particular protocol in relation to a specific destination address.
The triggers are as follows:
When the application is the only trigger you define in an allow-traffic rule, the firewall allows the application to perform any network operation. The application is the significant value, not the network operations that the application performs. You can define additional triggers to describe the particular network protocols and hosts with which communication is allowed.
If you define a network adapter trigger, the rule is relevant only to the traffic that is transmitted or received by using the specified type of adapter. You can specify either any adapter or the one that is currently associated with the client computer.
Rule conditions consist of the rule schedule and screen saver state.
The conditional parameters do not describe an aspect of a network connection. Instead, the conditional parameters determine the active state of a rule. You may define a schedule or identify a screen saver state that dictates when a rule is considered to be active or inactive. The conditional parameters are optional and if not defined, not significant. The firewall does not evaluate inactive rules.
The Log settings let you specify whether the server creates a log entry or sends an email message when a traffic event matches the criteria that are set for this rule.
The Severity setting lets you specify the severity level of the rule violation.
To customize firewall rules
In the console, open a Firewall policy.
On the Firewall Policy page, under Windows Settings or Mac Settings, click Rules.
For versions earlier than 14.2, there is no option for Mac Settings.
On the Rules tab, in the Rules list, in the Enabled field, ensure that the box is checked to enable the rule; uncheck the box to disable the rule.
Symantec Endpoint Protection only processes the rules that you enable. All rules are enabled by default.
Double-click the Name field and type a unique name for the firewall rule.
Right-click the Action field and select the action that you want Symantec Endpoint Protection to take if the rule is triggered.
In the Time column, specify the time periods in which this rule is active.
Right-click the Screen Saver field and specify the state that the client computer's screen saver must be in for the rule to be active.
The Created At field is not editable. If the policy is shared, the term Shared appears. If the policy is not shared, the field shows the name of the group to which that the non-shared policy is assigned.
Right-click the Description field, click Edit, type an optional description for the rule, and then click OK.
If you are done with the configuration of the rule, click OK.