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.

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.

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.

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

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.