Port Forwarding And Port Triggering; Remote Computer Access Basics - NETGEAR WNDR4500v2 User Manual

Fill in the Repeater IP Address field. This IP address has to be in the same subnet as the
3.
base station, but different from the LAN IP address of the base station.
Click Apply to save your changes.
4.
Verify connectivity across the LANs.
5.
A computer on that joins the network can connect to the Internet or share files and
printers with computers and servers connected to the other access point.

Port Forwarding and Port Triggering

By default, the router blocks inbound traffic from the Internet to your computers except replies
to your outbound traffic. You might need to create exceptions to this rule for these purposes:
To allow remote computers on the Internet to access a server on your local network.
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To allow certain applications and games to work correctly when the router does not
•
recognize their replies.
Your router provides two features for creating these exceptions: port forwarding and port
triggering. The next sections provide background information to help you understand how
port forwarding and port triggering work, and the differences between the two.

Remote Computer Access Basics

When a computer on your network needs to access a computer on the Internet, your
computer sends your router a message containing the source and destination address and
process information. Before forwarding your message to the remote computer, your router
has to modify the source information and create and track the communication session so that
replies can be routed back to your computer.
Here is an example of normal outbound traffic and the resulting inbound responses:
You open a browser, and your operating system assigns port number 5678 to this
1.
browser session.
You type http://www.example.com into the URL field, and your computer creates a web page
2.
request message with the following address and port information. The request message is
sent to your router.
Source address. Your computer's IP address.
Source port number. 5678, which is the browser session.
Destination address. The IP address of www.example.com, which your computer finds
by asking a DNS server.
Destination port number. 80, which is the standard port number for a web server
process.
Your router creates an entry in its internal session table describing this communication
3.
session between your computer and the web server at www.example.com. Before sending
the web page request message to www.example.com, your router stores the original
N900 Wireless Dual Band Gigabit Router WNDR4500v2
Advanced Settings
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