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Page 91 / 125 Scroll up to view Page 86 - 90
Advanced Settings
91
N750 Wireless Dual Band Gigabit Router WNDR4300
Wireless repeater
. The router sends all traffic from its local wireless or wired computers to a
remote access point. To configure this mode, you have to know the MAC address of the
remote parent access point.
The router is always in dual-band concurrent mode, unless you turn off one radio. If you
enable the wireless repeater in either radio band, the wireless base station or wireless
repeater cannot be enabled in the other radio band. However, if you enable the wireless base
station in either radio band and use the other radio band as a wireless router or wireless base
station, dual-band concurrent mode is not affected.
For you to set up a wireless network with WDS, both access points must meet the following
conditions:
•
Both access points have to use the same SSID, wireless channel, and encryption mode.
•
Both access points have to be on the same LAN IP subnet. That is, all the access point
LAN IP addresses are in the same network.
•
All LAN devices (wired and wireless computers) are configured to operate in the same
LAN network address range as the access points.
To view or change the Wireless Repeating Function settings:
Select
Advanced > Advanced Setup > Wireless Repeating
to view or change wireless
repeater settings for the router.
Scroll to view
more settings
The following settings are available:
•
Enable Wireless Repeating Function
. Select the check box for the 2.4
GHz or 5 GHz
network to use the wireless repeating function.
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Advanced Settings
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N750 Wireless Dual Band Gigabit Router WNDR4300
•
Wireless MAC of this router
. This field displays the MAC address for your router for your
reference. You need to enter this MAC address in the corresponding Wireless Repeating
Function screen of the other access point you are using.
•
Wireless Repeater
. If your router is the repeater, select this check box.
Repeater IP Address
. If your router is the repeater, enter the IP address of the other
access point.
Disable Wireless Client Association
. If your router is the repeater, selecting this check
box means that wireless clients cannot associate with it. Only LAN client associations are
allowed.
-
If you are setting up a point-to-point bridge, select this check box.
-
If you want all client traffic to go through the other access point (repeater with wireless
client association), leave this check box cleared.
Base Station MAC Address
. If your router is the repeater, enter the MAC address for the
access point that is the base station.
•
Wireless Base Station
. If your router is the base station, select this check box.
Disable Wireless Client Association
. If your router is the base station, selecting this
check box means that wireless clients cannot associate with it. Only LAN client
associations are allowed.
Repeater MAC Address (1 through 4)
. If your router is the base station, it can act as the
“parent” of up to four other access points. Enter the MAC addresses of the other access
points in these fields.
Set Up the Base Station
The wireless repeating function works only in hub and spoke mode. The units cannot be
daisy-chained. You have to know the wireless settings for both units. You have to know the
MAC address of the remote unit. First, set up the base station, and then set up the repeater.
To set up the base station:
1.
Set up both units with the same wireless settings (SSID, mode, channel, and security).
The wireless security option must be set to None or WEP.
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Advanced Settings
93
N750 Wireless Dual Band Gigabit Router WNDR4300
2.
Select
Advanced > Advanced Setup > Wireless Repeating Function
to display the
Wireless Repeating Function screen.
Scroll to view
more settings
3.
Select the
Enable Wireless Repeating Function
check box and select the
Wireless Base
Station
radio button.
4.
Enter the MAC address for one or more repeater units.
5.
Click
Apply
to save your changes.
Set Up a Repeater Unit
Use a wired Ethernet connection to set up the repeater unit to avoid conflicts with the
wireless connection to the base station.
Note:
If you are using the WNDR4300 base station with a non-NETGEAR
router as the repeater, you might need to change additional
configuration settings. In particular, you should disable the DHCP
server function on the wireless repeater
AP.
To configure the router as a repeater unit:
1.
Log in to the router that will be the repeater.
2.
Select
Basic > Wireless Settings
and
verify that the wireless settings match the base unit
exactly. The wireless security option must be set to None or WEP.
3.
Select
Advanced > Wireless Repeating Function
, and select the
Enable Wireless
Repeating Function check box
and the
Wireless Repeater
radio button.
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Advanced Settings
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N750 Wireless Dual Band Gigabit Router WNDR4300
4.
Fill in the Repeater IP Address field. This IP address must be in the same subnet as the
base station, but different from the LAN IP address of the base station.
5.
Click
Apply
to save your changes.
6.
Verify connectivity across the LANs.
A computer on any wireless or wired LAN segment of the router can connect to the
Internet or share files and printers with any other wireless or wired computer or server
connected to the other access point.
Port Forwarding and 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.
•
To allow certain applications and games to work correctly when your 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:
1.
You open a browser and your operating system assigns port number 5678 to this
browser session.
2.
You type http://www.example.com into the URL field, and your computer creates a web page
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.
3.
Your router creates an entry in its internal session table describing this communication
session between your computer and the web server at www.example.com. Before sending
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Advanced Settings
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N750 Wireless Dual Band Gigabit Router WNDR4300
the web page request message to www.example.com, your router stores the original
information and then modifies the source information in the request message, performing
Network Address Translation (NAT):
•
The source address is replaced with your router’s public IP address. This is
necessary because your computer uses a private IP address that is not globally
unique and cannot be used on the Internet.
•
The source port number is changed to a number chosen by the router, such as
33333. This is necessary because two computers could independently be using the
same session number.
Your router then sends this request message through the Internet to the web server at
www.example.com.
4.
The web server at www.example.com composes a return message with the requested web
page data. The return message contains the following address and port information. The
web server then sends this reply message to your router.
Source address
. The IP address of www.example.com.
Source port number
. 80, which is the standard port number for a web server process.
Destination address
. The public IP address of your router.
Destination port number
. 33333.
5.
Upon receiving the incoming message, your router checks its session table to determine
whether there is an active session for port number 33333. Finding an active session, the
router then modifies the message to restore the original address information replaced by
NAT. Your router sends this reply message to your computer, which displays the web page
from www.example.com. The message now contains the following address and port
information.
Source address
. The IP address of www.example.com.
Source port number
. 80, which is the standard port number for a web server process.
Destination address
. Your computer’s IP address.
Destination port number
. 5678, which is the browser session that made the initial
request.
6.
When you finish your browser session, your router eventually detects a period of inactivity in
the communications. Your router then removes the session information from its session
table, and incoming traffic is no longer accepted on port number 33333.
Port Triggering to Open Incoming Ports
In the preceding example, requests are sent to a remote computer by your router from a
particular service port number. Replies from the remote computer to your router are directed
to that port number. If the remote server sends a reply to a different port number, your router
does not recognize it and discards it. However, some application servers (such as FTP and
IRC servers) send replies to multiple port numbers. Using the port triggering function of your
router, you can tell the router to open additional incoming ports when a particular outgoing
port originates a session.

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