Gre Tunnel - Teltonika RUT100 HSDPA User Manual

4.7.2

GRE Tunnel

GRE (Generic Routing Encapsulation RFC2784) is a solution for tunneling RFC1812 private
address-space traffic over an intermediate TCP/IP network such as the Internet. GRE tunneling does
not use encryption it simply encapsulates data and sends it over the WAN.
WAN IP:
A.A.A.A
LAN1 192.168.0.0/24
192.168.0.2
Figure 29. Typical GRE tunnel application connecting two remote networks
In the example network diagram (Fig. 23) two distant networks LAN1 and LAN2 are connected.
To create GRE tunnel the user must know the following parameters:
1. Source and destination IP addresses (From Fig. 23 A.A.A.A and B.B.B.B).
2. Tunnel local IP address
3. Distant network IP address and Subnet mask
Figure 30. GRE tunnel settings
Internet
Tunnel 10.0.0.1/24
GRE tunnel
WAN IP:
B.B.B.B
Tunnel 10.0.0.2/24
LAN1 192.168.1.0/24
LAN2 192.168.1.2
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