Chapter 11 Firewall

Figure 150 Block VPN to LAN Traffic by Default Example

11.3.3 From VPN To VPN Packet Direction

From VPN To VPN firewall rules apply to traffic that comes in through one of the ZyWALL’s VPN tunnels and terminates at the ZyWALL (like for remote management) or goes out through another of the ZyWALL’s VPN tunnels (this is called hub-and-spoke VPN, see Section 14.20 on page 344 for details). The ZyWALL decrypts the traffic and applies the firewall rules before re-encrypting it or allowing the traffic to terminate at the ZyWALL.

In the following example, the From VPN To VPN default firewall rule silently blocks the traffic that the ZyWALL receives from any VPN tunnel (either A or B) that is destined for the other VPN tunnel or the ZyWALL itself. VPN traffic destined for the DMZ is allowed through.

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ZyWALL 2WG User’s Guide