Customizing firewall rules
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 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:
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 theFirewall Policypage, underWindows SettingsorMac Settings, clickRules.For versions earlier than 14.2, there is no option forMac Settings.
- On theRulestab, in theRuleslist, in theEnabledfield, ensure that the box is checked to enable the rule; uncheck the box to disable the rule.Symantec Endpoint Protectiononly processes the rules that you enable. All rules are enabled by default.
- Double-click theNamefield and type a unique name for the firewall rule.
- Right-click theActionfield and select the action that you wantSymantec Endpoint Protectionto take if the rule is triggered.
- In theApplicationfield, define an application.
- In theHostfield, specify a host trigger.
- In addition to specifying a host trigger, you can also specify the traffic that is allowed to access your local subnet.
- In theServicefield, specify a network service trigger.
- In theLogfield, specify when you wantSymantec Endpoint Protectionto send an email message to you when this firewall rule is violated.
- Right-click theSeverityfield and select the severity level for the rule violation.
- In theAdaptercolumn, specify an adapter trigger for the rule.
- In theTimecolumn, specify the time periods in which this rule is active.
- Right-click theScreen Saverfield and specify the state that the client computer's screen saver must be in for the rule to be active.TheCreated Atfield 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 theDescriptionfield, clickEdit, type an optional description for the rule, and then clickOK.
- If you are done with the configuration of the rule, clickOK.