# Add IPv4 and IPv6 addresses to Layer 2 Firewall Cluster interfaces

You can add IPv4 and IPv6 addresses to system communication interfaces on Layer 2 Firewall Clusters.

##

For more details about the product and how to configure features, click Help or press F1.

## Steps

1. Right-click a Layer 2 Firewall Cluster and select Edit Layer 2 Firewall Cluster.
   The Engine Editor opens.
2. In the navigation pane on the left, select Interfaces.
3. Right-click a physical interface or a VLAN interface and add the IP address in one of the following ways:
   - To add an IPv4 address, select New > IPv4 Address
   - To add an IPv6 address, select New > IPv6 Address
4. Click the IPv4 Address or IPv6 Address cell in the table and enter the IP address for each node.
   Tip: To resolve the IP address from a DNS name, right-click the field, then select Resolve From DNS Name.
5. (IPv4 addresses only) If necessary, double-click the Contact Address cell in the table and define the contact address for each node.
   - In the Default field at the top of the dialog box, enter the default contact address. The default contact address is used by default whenever a component that belongs to another Location connects to this interface.
   - If components from some Locations cannot use the default contact address, click Add to define Location-specific contact addresses.
6. (IPv4 addresses only) Check the automatically filled-in Netmask and adjust it as necessary.
7. (IPv6 addresses only) Check the automatically filled-in Prefix Length and adjust it as necessary.
8. Click OK.
9. Click Save.
10. Continue the configuration in one of the following ways:
    - If you are creating a new Layer 2 Firewall Cluster element, add traffic inspection interfaces.
    - If you are editing an existing Layer 2 Firewall Cluster element, select system communication roles for IPS interfaces.

## IP Address Properties dialog box (Layer 2 Firewall Cluster interface)

Use this dialog box to define the properties of a Layer 2 Firewall Cluster interface IP address.

Option | Definition
--- | ---
Node ID | Shows the number assigned to the node.
Node | Shows the name of the node.
IPv4 Address or IPv6 Address | Enter the IPv4 address or IPv6 address.
Contact Address (IPv4 addresses only) | The IP address that components belonging to another Location use to connect to the interface. Double-clicking the Contact Address cell opens the Exceptions dialog box.
Comment | Adds a comment to the IP address.

Option | Definition
--- | ---
Network Settings section
Netmask (IPv4 addresses only) | Automatically populated IP address or netmask length (1–32). You can change this value if needed.
Prefix Length (IPv6 addresses only) | Automatically populated length. Adjust it if necessary by entering a value between 0–128.
Network Address | The network address is automatically filled in and cannot be edited.
Broadcast IP Address (IPv4 addresses only) | The broadcast IP address is automatically filled in and cannot be edited.

## Resolve IP Address From DNS Name dialog box

Use this dialog box to resolve an IP address from a DNS name.

Option | Definition
--- | ---
DNS Name | The DNS name that you want to resolve.
Resolve | Select to display a list of IP addresses that the DNS name resolves to. Note: The IP addresses are resolved by the computer running the Management Client.
IP Address | Select the IP address that you want to use.