User manual

Chapter 7 Tutorials
ZyWALL USG 300 User’s Guide
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7.5.3 Configure Security Policies for the VPN Tunnel
You configure security policies based on zones. Assign the new VPN connection to
a zone to be able to apply security policies (firewall rules, IDP, and so on) to the
VPN connection. Make sure all firewalls between the ZyWALL and remote IPSec
router allow UDP port 500 (IKE) and IP protocol 50 (AH) or 51 (ESP). If you enable
NAT traversal, all firewalls between the ZyWALL and remote IPSec router should
also allow UDP port 4500.
7.6 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 99 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)