that some software needs the IP address of the PC to be ‘exposed’ to the outside world – this is just what NAT stops!
The normal way around this problem whilst still retaining the NAT
mode is to use port forwarding. Port forwarding (also sometimes
called pinholeing) tells the router to direct certain incoming traffic to
specified local addresses. e.g. if you are wanting to run a local web
server on address 192.168.0.10 and you want external internet users
to be able to see your server then you need to instruct the router to
forward all port 80 TCP requests (the port used by http) to your local
server.
To setup port forwarding connect your router to the com port of your
PC start the ADSL Configuration programme and click on
Properties:
Now click on the ‘Setting Port Forwarding Rules’
link:
Enter the port rule and then click on ‘Add A Rule’:
The Rule will show in the list (see opposite).
When you’ve added all the rules you need click on Confirm. Then
OK on the Properties screen and then Apply to send the new
configuration across to the router.
Now, whenever anyone tries to access your IP address (That’s the
external IP address as allocated to you by your ISP) using port 80
the router will automatically forward the request to your local client
at address 192.168.0.10.
7. Advanced PPP Settings
The Advanced PPP Settings part of the configuration application
allows you to alter the less common PPP settings. To do this go
into the Properties page. Then triple click on the title on the screen
that says ‘PPPoA(RFC 2364) Configuration’; this means click
three times quickly with the left-mouse-button (it takes a few
attempts to get this right!). Then the Advanced section is
displayed:
The only settings you might need to alter on the screen are the
LLC Encapsulation – but only tick this if you have an ADSL line
from Kingston Communications (do not alter for BT).
Also the Static PPP IP. This allows you to enter a static IP for
your ISP connection (the default is normally to use the dynamic IP
address supplied by the ISP).
You are adviced to NOT alter any other settings on this section.
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