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I am planning my ZyWALL behind a NAT router. What do I need to know?

April 26, 2017NAT planning Router zywall

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I am planning my ZyWALL behind a NAT router. What do I need to know?

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Some tips for this: The NAT router must support to pass through IPSec protocol. Only ESP tunnel mode is possible to work in NAT case. In the NAT router is ZyWALL NAT router supporting IPSec pass through, default port and the ZyWALL WAN IP must be configured in NAT Server Table. WAN IP of the NAT router is the tunneling endpoint for this case, not the WAN IP of ZyWALL. If firewall is turned on in ZyWALL, you must forward IKE port in Internet interface. If NAT are also enabled in ZyWALL, NAT server is required for non-secure connections, NAT server is not required for secure connections and the physical private IP is used.