103
User
Manual
GWG Gateway
GRE Tunnel configuration between GWG Gateway and third party router
GRE tunnel is a type of a VPN tunnels, but it isn't a secure tunneling method. However, you can
encrypt GRE packets with an encryption protocol such as IPSec to form a secure VPN.
On the diagram below (
Figure
79
9
) is illustrated simple network with two sites. Idea is to create GRE
tunnel for LAN to LAN (site to site) connectivity.
Figure
79
– GRE tunnel between Cisco router and GWG Gateway
GRE tunnel is created between Cisco router with GRE functionality on the HQ Site and the GWG
Gateway on the Remote Network. In this example, it is necessary for both, gateway and route, to create
tunnel interface (virtual interface). This new tunnel interface is its own network. To each of the gateway and
router, it appears that it has two paths to the remote physical interface and the tunnel interface (running
through the tunnel). This tunnel could then transmit unroutable traffic such as NetBIOS or AppleTalk.
The GWG Gateway uses Network Address Translation (NAT) where only the mobile IP address is
visible to the outside. All outgoing traffic uses the GWG Gateway WAN/VPN mobile IP address. HQ Cisco
router acts like gateway to remote network for user in corporate LAN. It also performs function of GRE
server for termination of GRE tunnel. The GWG Gateway act like default gateway for Remote Network and
GRE server for tunnel.
1.
HQ router requirements:
•
HQ router require static IP WAN address,
•
Router or VPN appliance has to support GRE protocol,
•
Tunnel peer address will be the GWG Gateway WAN's mobile IP address. For this reason, a static
mobile IP address is preferred on the GWG Gateway WAN (GPRS) side,
•
Remote Subnet is remote LAN network address and Remote Subnet Mask is subnet of remote
LAN.
Summary of Contents for GWG
Page 1: ...GWG Gateway USER MANUAL GWG Document version 1 0 1 Date July 2016 WWW GENEKO RS ...
Page 43: ...43 User Manual GWG Gateway Figure 22 RIP configuration page ...
Page 136: ...136 User Manual GWG Gateway Click OK Figure 125 Policies from trust to untrust zone ...
Page 156: ...156 User Manual GWG Gateway Figure 150 Configuration page for SIM keepalive ...