Ip Routing - Dynamic; Routing; Virtual Server - Port Forwarding - NetComm NB6 User Manual

Gateway: 192.168.1.254 (Router B)
IP Routing – Dynamic Routing (NB6Plus4W/NB6Plus4Wn only)
Routing Information Protocol (RIP) is utilized by means of exchanging routing information between
routers. It helps the routers to determine optimal routes. This page allows you to enable/disable this
function.
RIP Version:
It incorporates the RIP information when receiving and broadcasting the RIP packets. From the
drop down menu, select a RIP version to be accepted, 1, 2 or both.
Operation:
There are two modes for you to choose, Active and Passive. Select Active for transmitting and
receiving data, or select Passive for receiving data only.
Enabled:
Check Enabled to enable the RIP function on different interface. Otherwise, disable this
function.
Click Apply to invoke the settings set here.
Virtual Server – Port Forwarding
The Router implements NAT to make your entire local network appear as a single machine to the
Internet. The typical situation is that you have local servers for different services and you want to make
them publicly accessible. With NAT applied, it will translate the internal IP addresses of these servers
to a single IP address that is unique on the Internet. NAT function not only eliminates the need for
multiple public IP addresses but also provides a measure of security for your LAN.
When the router receives an incoming IP packet requesting for accessing your local server, the router
will recognize the service type according to the port number in this packet (e.g., port 80 indicates HTTP
service and port 21 indicates FTP service). By specifying the port number, the router knows which
service should be forwarded to the local IP address that you specified.
After setting the virtual server, you should modify the filter rule about the port and service information
which you set on the virtual server. Because the firewall protects the router by filter rule, you should
update the filter rule after you set up the virtual server.
Virtual Server function 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: