ZyXEL Communications 1000 User Manual

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 Chapter 7 Tutorials
ZyWALL USG 1000 User’s Guide
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7.5  How to Configure a Hub-and-spoke IPSec 
VPN Without a VPN Concentrator
A hub-and-spoke IPSec VPN connects IPSec VPN tunnels to form one secure 
network. This reduces the number of VPN connections that you have to set up and 
maintain in the network. Here is an example of a hub-and-spoke VPN that does 
not use the ZyWALL’s VPN concentrator feature. Here branch office A has a 
ZyNOS-based ZyWALL and headquarters (HQ) and branch office B have USG 
ZyWALLs. 
• Branch office A’s ZyWALL uses one VPN rule to access both the headquarters 
(HQ) network and branch office B’s network. 
• Branch office B’s ZyWALL uses one VPN rule to access both the headquarters 
and branch office A’s networks. 
Figure 83   Hub-and-spoke VPN Example
This hub-and-spoke VPN example uses the following settings.
Branch Office A (ZyNOS-based ZyWALL):
Gateway Policy (Phase 1)
• My Address: 10.0.0.2
• Primary Remote Gateway: 10.0.0.1
Network Policy (Phase 2)
• Local Network: 192.168.167.0/255.255.255.0
• Remote Network: 192.168.168.0~192.168.169.255
Headquarters (ZyWALL USG):
VPN Gateway (VPN Tunnel 1):