# Define contact addresses for an External VPN Gateway

Define a contact address for an External VPN Gateway if the IP address for contacting the gateway is different from the IP address of the gateway's interface (for example, because of NAT).

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## Steps

1. Select Configuration, then browse to SD-WAN.
2. Browse to Gateways.
3. Right-click an External VPN Gateway element, then select Properties.
4. In the External VPN Gateway Properties dialog box, click the Endpoints tab.
5. Right-click an endpoint and select Properties.
6. Enter the Default contact address or select Dynamic if the Default contact address is dynamic.
   - The Default contact address is used by default whenever a component that belongs to another Location connects to this endpoint.
7. (Optional) If some components cannot use the Default contact address, click Exceptions to define contact addresses that the components use to connect to this endpoint.
8. Click Add and select a Location.
   A new row is added to the table.
9. Click the Contact Address column and enter the IP address that components belonging to this Location use when they contact the endpoint, or select Dynamic.
10. Click OK to close the Exceptions dialog box.
11. Click OK to close the Endpoint Properties dialog box.

## Exceptions dialog box

Use this dialog box to define to define Location-specific contact addresses.

Option | Definition
--- | ---
Add | Adds the element to the Contact Addresses list.
Remove | Removes the element from the Contact Addresses list.