In addition to creating specific rules for the programs installed, the firewall lets you create rules applicable to all the PC communications. These rules will have priority over the rules that you have established for the programs installed.
The general system rules let you open or close certain communication ports, allow or deny communications with computers with a certain IP address, etc.
You can create a general system rule, or configure an existing one, by following these instructions:
Click Firewall in the main window of the program.
In the Rules section, click Settings to define the ports and protocols that your PC can use to communicate.
This window contains the list of rules you have created and lets you establish the priority with which the rules will be applied. You can order them using the Up and Down buttons. The rule in the first place in the list will have priority over the rule in second place, and so on.
If you want to recover the original settings, click Restore.
Click Add to create a new rule, or Settings to edit an existing rule.
Adding or configuring general system rules (Learn more)
There are certain parameters you can define when adding or configuring a rule:
Rule name: Enter a descriptive name for the rule.
Action: Use the drop-down menu if you want to allow or deny connections established by the PC through the ports, IP addresses, protocols or zones you select.
Direction: Specify if you want the rule to affect inbound connections, outbound connections, or both.
Zone: It lets you apply the rule to the connections that the computer establishes on the local network (trusted network), on the Internet (public network) or both.
Protocol: You can specify to which protocol the rule will apply (TCP/UDP, TCP, UDP, IP or ICMP). if you select ICMP, in addition to indicating the direction of the communication to which the rule will apply (inbound or outbound), you must also select the corresponding ICMP services. To do this, just select the relevant checkboxes.
Local: This lets you specify the ports on your computer through which you will allow or deny communications.
Remote: This lets you specify the ports on other network computers through which you will allow or deny communications.
In both cases, you can select one of the listed ports or choose any other one. If you want to select a specific port, select the Customized option and indicate the relevant ports or ranges. To add more than one port, separate them with commas. Ranges should be separated by a hyphen (For example: 6700, 6800, 6900-7000).
IP addresses: If you only want the program to connect through a specific IP address, or range of IP addresses, you can indicate this in the relevant box.
MAC addresses: This lets you apply the rule to communications established with a PC whose network adapter has a specificMACaddress.
Note: You can specify more than one IP address or MAC address, separating them with commas. You can also specify a range of addresses, separated with a hyphen. For example, 192.168.1.1-192.168.1.254, 18.104.22.168 in the case of IP addresses, or 00:AF:C8:05:E0:FF,08:06:AC:15:E2:FF in the case of MAC addresses.
Once you have made the changes you want, click OK.