17.4 Managing firewalld using firewall-config
If you have access to the graphical desktop environment, the firewall may also be configured using the firewall-config tool. Though not installed by default, firewall-config may be installed as follows:
# apt install firewall-config
When launched, the main firewall-config screen appears as illustrated in Figure 17-1:
The key areas of the tool can be summarized as follows:
A - Displays all of the currently active interfaces and the zones to which they are assigned. To assign an interface to a different zone, select it from this panel, click on the Change Zone button and select the required zone from the resulting dialog.
B - Controls whether the information displayed and any changes made within the tool apply to the runtime or permanent rules.
C - The list of zones, services or IPSets configured on the system. The information listed in this panel depends on the selection made from toolbar F. Selecting...