Set up a secure IPv6 overlay

You may want to set up IPv6 to provide encrypted communication to the IPv6 Internet or between Airwall Gateways, to secure IPv6 communication, and carry IPv6 traffic across an IPv4 only network.

Supported Versions

v2.2.10 and later Conductor and Airwall Gateways

Supported Airwall Edge Services
v2.2.10 and later Airwall Gateways, plus any version of Airwall Relay since they do not decrypt traffic, they will relay IPv6 traffic.
Required Role
System and network administrators with permissions to the Airwall Gateways.
Note: IPv6 is not yet supported on:
  • L2 (aka subnet extension) – Having the same subnet behind multiple Airwall Gateways or multiple port groups on a single Airwall Gateway

The steps are:

  1. Configure an IPv6 static address for an Airwall Gateway
  2. Configure DHCPv6 (Optional if you configure a static IPv6 address and a default route to the Airwall's overlay IPv6 address on each IPv6 protected device)
  3. Discover devices, or create an /64 network object device on the Airwall Gateway
  4. Repeat steps 1-3 for other Airwall Gateways you want to communicate over IPv6.
  5. Set up an overlay and add trust between the /64 network object devices.

These steps are covered in more detail in the following sections.

Step 1: Configure an IPv6 static address

On an Airwall Gateway that supports IPv6, add an IPv6 overlay IP address:

  1. Go to Ports, select Edit Settings, and open an Overlay port group.
  2. Set the following options:
    • IP addresses – Select Static. If you need to add an address, click the plus (you can have both IPv4 and IPv6 static addresses assigned).
    • Type – Select IPv6.
    • IP address – Enter a /64 block and assign the overlay IPv6 address (best practice is to use ::1):
    Set a static IPv6 address on the Ports tab Overlay port group
    Note: Assign unique IP addresses for each Airwall Gateway you set up.
  3. Select Update Settings.

Step 2: Configure DHCPv6

Note: This step is optional if you configure a static IPv6 address and a default route to the Airwall Gateway's overlay IPv6 address on each IPv6 protected device.

On the Airwall Gateway, configure your DHCP settings for DHCPv6:

  1. Next to DHCP settings, select Configure.
  2. Enter your DNS servers and Domain. The rest should be filled in for you.
    DHCP settings for IPv6
  3. Select Apply.

Step 3: Discover devices, or create a /64 network object

You can wait for automatic device discovery to detect IPv6 devices and accept them, or you can create an IPv6 network object if you do not need to set policy for individual devices. If you choose to discover and accept individual IPv6 devices, be aware that the devices may have IPv6 privacy extensions enabled that cause the device to obtain a new IPv6 address frequently (approximately every 15 minutes).

To create a IPv6 network object device on the Airwall Gateway for your local /64 network:

  1. Go to Local devices.
  2. Select Add device.
  3. Under Overlay device IP, enter the static IPv6 IP address you set up on the Overlay port group:
    On the Local devices tab, add a /64 network object to the Airwall Gateway
  4. Fill in other device details, and then select Create.

Step 4: Repeat for one or more Airwall Gateways

Repeat steps 1-3 above for additional Airwall Gateways.


IPv6-capable devices connected to these Airwall Gateways can now:
  • Obtain an IPv6 address
  • Use the Airwall Gateway as their IPv6 default gateway
  • Communicate with each other
Note: Some devices may require special configuration to enable IPv6 or IPv6 auto configuration.