# Define endpoints for External VPN Gateways

Each endpoint is dedicated for one External VPN Gateway element.

## Before you begin

You must have an External VPN Gateway element.

##

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

## Steps

1. Select Secure SD-WAN.
2. Browser to External VPN Gateway.
3. Right-click the External VPN Gateway element, then select Properties.
4. On the Endpoints tab, click Add.
5. Configure the following optional settings according to your environment if needed.
   1. (Optional) In the Name field, enter a descriptive name for the endpoint.
   2. (Policy-Based VPNs only) From the Connection Type drop-down list, select an option to define how the endpoint is used in a Multi-Link configuration.
      You can override these settings in each individual VPN.
   3. (Optional) From the Use NAT-T drop-down list, select an option to activate encapsulation for NAT traversal in site-to-site VPNs.
      You might need NAT traversal to traverse a NAT device at the local or at the remote gateway end. The gateway always allows VPN clients to use NAT-T regardless of these settings. NAT-T always uses the standard UDP port 4500.
      Note: If a private external IP address is translated to a public IP address by an external NAT device, make sure that Contact Addresses and Locations are defined for the Engine.
   4. If necessary, change the default Contact Address or add Exceptions for the Locations of other gateways involved in the VPN.
      The Contact Address must be defined if the IP address for contacting this gateway is different from the IP address that the gateway actually has on its interface (for example, because of NAT).
      Example: An external gateway is behind a NAT device. The real address is defined as the endpoint address, because the IP address is also used as the Phase 1 ID inside the encrypted traffic. Contact must be made using the translated address, so it is defined as a Contact Address.
6. In the Phase-1 settings, select an option from the ID Type drop-down list to according to your environment.
   The ID identifies the Gateways during the IKE SA negotiations. The IP Address might not work as an ID if the address is translated using NAT.
7. In the ID Value field, enter an ID value according to the selected ID type.
   Note: Make sure that the ID value matches the identity configured on the external gateway device.
   - If you selected DNS Name, enter the DNS name that is configured on the external gateway device.
   - If you selected Email, enter the email address that is configured on the external gateway device.
   - If you selected Distinguished Name, enter the distinguished name that is used in the gateway certificate.
   - If the endpoint has a dynamic IP address, enter a specific IP address as the value for the IP Address type.
     Note: If the endpoint has a static IP address, the value for the IP Address type is filled in automatically.
8. Click OK to save your changes to the endpoint.

## External VPN Gateway Properties dialog box

Use this dialog box to define the properties of an External VPN Gateway element.

Option | Definition
--- | ---
General tab
Name | Specifies the unique name of the element.
Gateway Profile | Shows the selected gateway profile.
Select | Opens the Select Element dialog box.
Category | Shows the assigned category.
Select | Opens the Category Selection dialog box.
Comment | An optional comment for your own reference.

Option | Definition
--- | ---
Endpoints tab
Search | Opens a search field. Enter a search parameter to locate an endpoint. Clicking X removes the search field.
New | External Endpoint — Adds an external endpoint IP address. Opens the External Endpoint Properties dialog box.
Tools | Expand All — Expands all elements. Collapse All — Collapses all elements. Refresh View — Updates the element list. Remove — Removes the selected row from the table.
Add | Opens the External Endpoint Properties dialog box.
Edit | Opens the External Endpoint Properties dialog box for the selected endpoint.
Remove | Removes the selected endpoint from the list.

Option | Definition
--- | ---
Sites tab
Search | Opens a search field for the selected element list.
Up (Backspace) | Navigates up one level in the navigation hierarchy. Not available at the top level of the navigation hierarchy.
Tools | New — Creates an element of the specified type. Show Deleted Elements — Shows elements that have been moved to the Trash.
Add | Adds the selected element to the content list.
Remove | Removes the selected element from the content list.
Content | Shows the selected elements.

Option | Definition
--- | ---
Trusted CAs tab
Trust All | The gateway accepts any valid CA that is configured, unless restricted in the VPN element.
Trust only selected | Only selected CAs are accepted. Select the CAs that the Gateway must trust.

## External Endpoint Properties dialog box

Use this dialog box to define the properties of an External Endpoint in an IPsec VPN.

Option | Definition
--- | ---
Name | The name of the endpoint. If no name is entered, the IP address is used.
IP Address | If the endpoint has a static (manually defined) IP address, enter the IP address. This IP address must be the IP address that is configured for the external device in its configuration.
Dynamic | If the endpoint has a dynamic (DHCP-assigned) IP address, select this option.
Connection Type | Defines how the endpoint is used in a Multi-Link configuration.
NAT-T | Detects when an IPsec VPN tunnel goes through a NAT device. If NAT is detected, the VPN automatically uses UDP port 4500 for IKE negotiation messages, and encapsulates ESP packets in UDP packets that use port 4500. Disabled — NAT traversal is disabled. Enabled — Select this option to allow encapsulating the IPsec communications in standard NAT-T UDP packets in site-to-site VPNs when the gateways detect that a NAT operation is applied to the communications. If both gateways do not support this option, the option is ignored. Forced — Select this option to force NAT-T even when the gateways do not detect a NAT operation being applied to the communications. If both gateways do not support this option, the VPN fails to establish.
Use UDP encapsulation | This option is included for backward compatibility with legacy software versions.
Contact Addresses
Default | Used by default whenever a component that belongs to another Location connects to this endpoint.
Dynamic | Select when the endpoint has a dynamic Default contact address.
Phase-1 ID
ID Type | Identifies the gateway during the IKE phase-1 negotiations. DNS Name — A DNS name identifies the gateway. E-mail — An email address identifies the gateway. Distinguished Name — The Distinguished Name (DN) field in the gateway's certificate identifies the gateway. You can only add one DN value for each External VPN Gateway. IP Address — An IP address identifies the gateway. If the endpoint has a static IP address, the value is filled in automatically. If the endpoint has a dynamic IP address, you must manually enter an IP address.
ID Value | Specifies the details of the ID Type.