Configuring an interface on a Sophos XG Firewall involves setting up the network parameters, such as IP address, subnet mask, and interface role. Below are the steps to configure an interface on a Sophos XG Firewall:

1. Accessing the Web Admin Console:
   • Open a web browser and enter the IP address of the Sophos XG Firewall’s management interface.
   • Log in with administrative credentials.

2. Navigating to the Network Settings:

• • Once logged in, go to “System” on the top navigation bar and select “Network.”

3. Configuring Interfaces:

• • In the “Network” section, click on “Interfaces” from the left-hand menu.

4. Adding an Interface:

• • Click on the “Add Interface” button to start the configuration process.

5. Interface Configuration:

• • Choose the type of interface you want to create. For example, select “Ethernet” if you are configuring a physical LAN interface or “VLAN” if you are creating a virtual LAN interface.
  • Give the interface a meaningful name, such as “LAN” or “WAN,” for easy identification.

6. IP Settings:

• • Configure the IP address and subnet mask for the interface. This includes selecting the IP version (IPv4 or IPv6) and entering the appropriate IP information.

7. Interface Role:

• • Assign an appropriate interface role for the interface. Common roles include “LAN,” “WAN,” “DMZ,” etc. The role helps in automatically applying pre-configured firewall rules based on the interface’s purpose.

8. DHCP Settings (Optional):

• • If you want this interface to act as a DHCP server for connected devices, enable DHCP and set the DHCP range and other relevant settings.

9. Save and Apply Changes:

• • Click on the “Save” button to save the configuration.
  • After saving, the firewall will prompt you to apply the changes. Click on “Apply” to make the interface configuration active.

10. Verify Configuration:

• • Once the changes are applied, you can verify the interface configuration by going to “Interfaces” in the “Network” section. The newly configured interface should appear in the list.

Remember that configuring network interfaces on a Sophos XG Firewall should be done carefully, as incorrect settings can lead to connectivity issues. If you are unsure about any configuration option or the impact of the changes, it’s best to consult with a network administrator or IT professional to avoid any potential problems.