User's Manual

Advanced Features
48
Trusted PC
Allow Trusted
PC
Enable this to allow one computer to have Unrestricted Access to the
Internet. For this PC, any restrictions set by the blocking above will be
ignored.
Trusted IP
Address
Type the IP address of the computer in the fields provided.
Virtual Servers
This feature, sometimes called Port Forwarding, allows you to make Servers on your LAN
accessible to Internet users. Normally, Internet users would not be able to access a server on
your LAN because:
• Your Server does not have a valid external IP Address.
• Attempts to connect to devices on your LAN are blocked by the firewall in this device.
The "Virtual Server" feature solves these problems and allows Internet users to connect to your
servers, as illustrated below.
Wireless
Router
Web Server FTP Server
Internet
Remote PC Remote PC
Using Web Server Using FTP Server
(http://203.70.212.52)
(ftp://203.70.212.52)
203.70.212.52
192.168.0.1
(192.168.0.10)
(192.168.0.20)
(LAN IP Address)
(Internet IP Address)
Figure 35: Virtual Servers
IP Address seen by Internet Users
Note that, in this illustration, both Internet users are connecting to the same IP Address, but
using different protocols.
To Internet users, all virtual Servers on your LAN have the same IP Address.
This IP Address is allocated by your ISP.