In this case (other than the example above), the peer with the static IP address initiates the VPN connection.
The VPN gateway Headquarters initiates a VPN connection to Branch office. Headquarters has a static IP address, Branch office a dynamic one.
Note: The entries for the ISDN connection are needed for the transmission of the actual dynamic IP address solely. The Internet access wizard configures the connection to the Internet.
Note: Alternatively, this application can be solved with the help of dynamic DNS. In this constellation, the headquarters with its static IP address connects to the branch office with the help of a dynamic DNS name which is assigned to the current dynamic IP address.
| Entry | Headquarters | Branch | |
|---|---|---|---|
| Type of local IP address | static | dynamic | |
| Type of remote IP address | dynamic | static | |
| Name of the local device | Headquarters | Branch | |
| Name of the remote site | Branch | Headquarters | |
| ISDN-calling number of the remote device | 06954321 | 03012345 | |
| ISDN calling line ID of the remote device | 06954321 | 03012345 | |
| Password for the secure transmission of the IP address | confidential | confidential | |
| Shared Secret for encryption | secret | secret | |
| IP address of the remote device | 193.10.10.1 | ||
| IP-network address of the remote network | 10.10.2.0 | 10.10.1.0 | |
| Netmask of the remote network | 255.255.255.0 | 255.255.255.0 |
Note: The described connection set up requires an ISDN connection for both VPN gateways. But usually no charges will arise for this procedure.
