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How the router implements the port forwarding rule
The following sequence shows the effects of a port forwarding rule:
1. When you type the URL www.example.com in your browser, the browser sends a
web page request message with the following destination information:
• Destination address: The IP address of www.example.com, which is the address
of your router.
• Destination port number: 80, which is the standard port number for a web
server process.
2. Your router receives the message and finds your port forwarding rule for incoming
port 80 traffic.
3. The router changes the destination in the message to IP address 192.168.1.123 and
sends the message to that computer.
4. Your web server at IP address 192.168.1.123 receives the request and sends a reply
message to your router.
5. Your router performs Network Address Translation (NAT) on the source IP address,
and sends the reply through the Internet to the computer or WiFi device that sent
the web page request.
Application example: Make a local web server public
If you host a web server on your local network, you can use port forwarding to allow
web requests from anyone on the Internet to reach your web server.
To make a local web server public:
1. Assign your web server either a fixed IP address or a dynamic IP address using DHCP
address reservation.
In this example, your router always gives your web server an IP address of
192.168.1.33.
2. On the Port Forwarding/Port Triggering page, configure the router to forward the
HTTP service to the local address of your web server at 192.168.1.33.
HTTP (port 80) is the standard protocol for web servers.
3. (Optional) Register a host name with a Dynamic DNS service, and specify that name
on the Dynamic DNS page of the router.
Customize Internet Traffic Rules
for Ports
Whole Home Quad-Band Mesh WiFi 7 System
133
User Manual
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