User`s manual

Subnet Mask: Enter the secondary subnet mask for the LAN port.
6.3 NAT
Note: This option is not available for bridge mode.
To display the NAT function, you need to enable the NAT feature in the
WAN Setup.
6.3.1 Virtual Servers
Note: This option is not available for Bridge mode.
Virtual Server allows you to direct incoming traffic from WAN side
(identified by Protocol and External port) to the Internal server with
private IP address on the LAN side. The Internal port is required only if
the external port needs to be converted to a different port number
used by the server on the LAN side. A maximum 32 entries can be
configured.
To add a Virtual Server, simply click the Add button. The following will
be displayed.
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