ZyXEL P-794H User Guide - Page 185

Chapter 15 Security The following table describes the labels in this screen. Table 82 Global Address Pools LABEL DESCRIPTION Interface Type Select the type of interface that is to be mapped to an external interface. Click the drop-down list and select an interface type. Use Subnet Configuration there are two ways to specify a range of IP addresses: • Use Subnet Mask: specify the subnet mask address of the IP address) • Use IP Address Range: specify the first and last IP address in the range. Click the drop-down list and select a method. IP Address Enter an IP address that is visible outside the network. Subnet Mask/IP Address 2 The value specified here depends on the subnet configuration that is being used. If you chose Use Subnet Mask, enter the subnet mask of the IP address. If you chose Use IP Address Range, enter the last IP address in the range of addresses that make up the global address pool. Add Global Address Pool Click this to refresh the table and the global address pool will be added to the NAT configuration. NAT Reserved Mapping Reserved mapping allows an outside security interface or an IP address to be mapped from a global pool to an individual IP address inside the network. Mapping is based on transport type and port number. Click Add Reserved Mapping in the Advanced NAT Configuration screen. Figure 113 NAT Reserved Mapping P-794H User's Guide 185