ADSL2+ (802.11g) (VPN) Firewall Router
Chapter 4: Configuration
107
Add Virtual Server
Because NAT can act as a “natural” Internet firewall, your router protects your network from being
accessed by outside users when using NAT, as all incoming connection attempts will point to your router
unless you specifically create Virtual Server entries to forward those ports to a PC on your network.
When your router needs to allow outside users to access internal servers, e.g. a web server, FTP server,
Email server or game server, the router can act as a “virtual server”. You can set up a local server with a
specific port number for the service to use, e.g. web/HTTP (port 80), FTP (port 21), Telnet (port 23),
SMTP (port 25), or POP3 (port 110), When an incoming access request to the router for a specified port is
received, it will be forwarded to the corresponding internal server.
Application
: Users-define description to identify this entry or click
drop-down menu
to select
existing predefined rules.
:
20 predefined rules are available. Application, Protocol and External/Redirect Ports will be
filled after the selection.
Protocol
: It is the supported protocol for the virtual server. In addition to specifying the port number to be
used, you will also need to specify the protocol used. The protocol used is determined by the particular
application. Most applications will use TCP or UDP.
Time Schedule:
User-defined time period to enable your virtual server. You may specify a time
schedule or Always on for the usage of this Virtual Server Entry. For setup and detail, refer to
Time
Schedule
section
External Port:
The Port number on the Remote/WAN side used when accessing the virtual server.
Redirect Port:
The Port number used by the Local server in the LAN network.
Internal IP Address:
The private IP in the LAN network, which will be providing the virtual server
application.
List all existing PCs connecting to the network. You may assign a PC with IP
address and MAC from this list.
