Select the new External_IP object as 'External IP'.Choose the incoming interface (usually WAN1 or ge2).

To create the NAT rule, go to Configuration( ) → Network → NAT menu, and click the Add button. Use the same step for the server's host object.

To create an address object, go to the Configuration( ) menu. In this tutorial we will create two objects, one for the secondary WAN IP-address and one for the server's internal IP address. To create a NAT One-to-One rule, the simplest way is to start with creating address objects. 212.130.62.52 will be directly forwarded to the selected internal client. Let's say the Zyxel appliance has some extra IP-addresses available. This guideline describes how to setup 1:1 NAT in ZLD enabled appliances. For example, if you have a server hosting multiple services (mail and web host, etc.), you can use a 1:1 NAT rule to open all ports/services to the internal server. If you have a block of public IP addresses assigned by the ISP (Internet Service Provider), you can use this mechanism to make the server publicly available. If the Zyxel device has only one public IP you can make the computers in the private network available by using ports to forward packets to the appropriate private IP address.ġ:1 NAT allows you to map one internal address to one external address. Use Network Address Translation (NAT) to make computers on a private network behind the Zyxel device available outside the private network. For example, the source address of an outgoing packet, used within one network is changed to a different Ip address known within another network. NAT (Network Address Translation - NAT, RFC 1631) is the translation of the IP address of a host in a packet.

This article will assist on setting up 1:1 NAT rules on the ATP/VPN series gateways.

Atp100