Operation Manual

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13 Advanced Settings
Network Address Translation (NAT) allows multiple users at your local site to
access the Internet through a single Public IP Address or multiple Public IP
Addresses. NAT provides Firewall protection from hacker attacks and has the
flexibility to allow you to map Private IP Addresses to Public IP Addresses for
key services such as Websites and FTP. Select Disable to disable the NAT
function.
Virtual Server
Use the Virtual Server function when you want different servers/clients in your
LAN to handle different service/Internet application type (e.g. Email, FTP, Web
server etc.) from the Internet. Computers use numbers called port numbers to
recognize a particular service/Internet application type. The Virtual Server
allows you to re-direct a particular service port number (from the Internet/WAN
Port) to a particular LAN private IP address and its service port number.