Note: As a default, any port not defined
on the Defined Ports tab is closed. Overview of Zone Security Options
Overview of Custom Level Security
The Custom Ports tab allows you to control ports that are not listed on the Defined Ports tab.
Note: As a default, any port not defined
on the Defined Ports tab is closed.
You can create a port rule that specifies the port number or port range, the applicable protocol (TCP or UDP), and the permission for incoming and outgoing communication.
As a default no custom port rules exist – all rules are created and configured by you, either explicitly on this tab or through selections made on the Communication Blocked or Recent Firewall Events windows.
You can also edit and delete rules that you've created.
Click Add at the top of the Custom Ports tab. The New port rule window opens.
Type in a short description in the Rule description field. An entry in this field is required.
Enter either the port number or the port range (required):
For a single port number, select the Port number option and enter the number in the field below the option.
For a port range, select the Port range option and enter the starting number in the first field (directly under Port number) and the ending number in the second field (directly under Port range).
Specify which protocol the rule applies to. Select either TCP, UDP, or both. A selection is required.
Select which direction the rule applies to.
To allow incoming access, select the Incoming check box. To block incoming access, clear the check box.
To allow outgoing access, select the Outgoing check box. To block outgoing access, clear the check box.
Click OK to save your rule and close the window. The rule now displays on the Custom Port tab.
Tip: The Internet Assigned
Numbers Authority maintains a list of ports at www.iana.org/assignments/port-numbers
When the Communication Blocked notice displays, click Show details to display information about the program and its communication attempt.
In the Port number section, click the link to allow access for that port.
If the port is not defined, a custom port rule is automatically created for it.
In the Firewall Odometer pane, click View event history to open the Recent Firewall Events window.
Click on the desired row to select it.
In the Port section of the Selected Event section, click the link to allow or block access to that port.
If a communication attempt was blocked, the link will let you open the port (if it isn't open already; if it is open, no link displays). If the communication was allowed, the link will let you close the port (if the port isn't closed already; if it is closed, no link displays).
If the port is not defined, a custom port rule is automatically created for it.
The tab displays the port rules you have created and also allows for fast edits.
Fast edits: To change the protocol, the incoming access, or the outgoing access, you can make changes directly on the tab:
In the In and Out columns, select a check box to indicate that the port is open to communication in that direction; clear a check box for those ports that you want to close.
In the TCP and UDP columns, specify whether the rule applies to TCP, UDP, or both. At least one check box must be selected.
Full edits: To change any of the values:
Select an existing rule and click Edit at the top of the Custom Ports tab. The Edit port rule window opens. This window offers the same functionality as the New Port rule window described above.
Select the rule you want to delete and click Delete at the top of the Custom Ports tab. (No confirmation message will display.)
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