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Vodafone MachineLink 3G
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GRE tunnelling
The Generic Route Encapsulation (GRE) protocol is used in addition to Point-to-Point Tunnelling Protocol (PPTP) to create VPNs
(virtual private networks) between clients and servers or between clients only. Once a PPTP control session establishes the VPN
tunnel GRE is used to securely encapsulate the data or payload.
Configuring GRE tunnelling
To configure GRE tunnelling:
1.
From the menu bar at the top of the screen, click Networking and then from the VPN section on the left side of the screen,
click
PPTP client. The PPTP client list is displayed.
Figure 70 - GRE client list
2.
Click the +Add button to begin configuring a new GRE tunnelling client profile. The GRE client edit screen is displayed.
Figure 71 – GRE client edit
3.
Click the Enable VPN toggle key to switch it to the ON position.
4.
In the Profile name, enter a profile name for the tunnel. This may be anything you like and is used to identify the tunnel on
the router.
5.
In the GRE server address field, enter the IP address of the GRE server.
6.
In the Local tunnel address field, enter the IP address you want to assign the tunnel locally.