A VPN tunnel via the Internet serves as the connection between the LANCOM Headquarters and branch office. Both sites have dynamic IP addresses. Thus, both can initiate the connection.
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. Instead of a static IP address, a dynamic DNS name helps
to find the dynamic IP address that is currently in use. More information
is available under .
| Entry | Headquarters | Branch_office | |
|---|---|---|---|
| Type of local IP address | dynamic |  |
dynamic |
| Type of remote IP address | dynamic | dynamic | |
| Name of the local device | Headquarters |  |
Branch_office |
| Name of the remote device | Branch_office | Headquarters | |
| ISDN-calling number of the remote device | 06954321 | 03012345 | |
| ISDN-caller 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-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: Dynamic VPN works only between LANCOM that each feature at least
one ISDN port that can be used for the ISDN connection