User's Manual

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 60 - 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 61 – 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.

NetComm Wireless CDMA M2M Router