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Advanced Settings
66
N150 4-Port Wireless Router JNR1010
Wireless Repeating Function
Select
Advanced > Advanced Setup > Wireless Repeating
to view or change wireless
repeater settings for the router.
You can configure the following wireless repeater settings:
•
Enable Wireless Repeating Function
. Select the check box for the 2.4
GHz or 5 GHz
network to use the wireless repeating function.
•
Wireless MAC of this router
. This field displays the MAC address for your router for your
reference. You will 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 the Disable Wireless Client
Association check box.
•
If you want all client traffic to go through the other access point (repeater with wireless
client association), leave the Disable Wireless Client Association 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.
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Advanced Settings
67
N150 4-Port Wireless Router JNR1010
•
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 4 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 must know the wireless settings for both units. You must know the MAC
address of the remote unit. Set up the base station first, 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.
2.
Select
Advanced > Advanced Setup > Wireless Repeating Function
to display the
Wireless Repeating Function screen.
3.
In the Wireless Repeating Function screen, 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.
Page 68 / 103
Advanced Settings
68
N150 4-Port Wireless Router JNR1010
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 JNR1010 base station with a non- 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
WEP
or
None
.
3.
Select
Advanced > Wireless Repeating Function
and select the
Enable Wireless
Repeating Function
check box and the
Wireless Repeater
radio button.
4.
Complete 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 should be able to
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.
Page 69 / 103
Advanced Settings
69
N150 4-Port Wireless Router JNR1010
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
must modify the source information and create and track the communication session so that
replies can be routed back to your computer.
Following 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:
•
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.
The request message is sent to your router.
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
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 step 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 assigned by the router, such as
33333. This step 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.
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.
The web server then sends this reply message to your router.
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
Page 70 / 103
Advanced Settings
70
N150 4-Port Wireless Router JNR1010
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.
An example is Internet Relay Chat (IRC). Your computer connects to an IRC server at
destination port 6667. The IRC server not only responds to your originating source port, but
also sends an “identify” message to your computer on port 113. Using port triggering, you can
tell the router, “When you initiate a session with destination port 6667, you must also allow
incoming traffic on port 113 to reach the originating computer.” Using steps similar to the
preceding example, the following sequence shows the effects of the port triggering rule that
you defined:
1.
You open an IRC client program to start a chat session on your computer.
2.
Your IRC client composes a request message to an IRC server using a destination port
number of 6667, the standard port number for an IRC server process. Your computer then
sends this request message to your router.
3.
Your router creates an entry in its internal session table describing this communication
session between your computer and the IRC server. Your router stores the original
information, performs Network Address Translation (NAT) on the source address and port,
and sends this request message through the Internet to the IRC server.
4.
Noting your port triggering rule and having observed the destination port number of 6667,
your router creates an additional session entry to send any incoming port 113 traffic to your
computer.
5.
The IRC server sends a return message to your router using the NAT-assigned source port
(as in the previous example, say port 33333) as the destination port. The IRC server also
sends an “identify” message to your router with destination port 113.

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