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N150 4-Port Wireless Router JNR1010
To set up a default DMZ server:
1.
On the WAN Setup screen, select the
Default DMZ Server
check box.
2.
Type the IP address.
3.
Click
Apply
.
Change the MTU Size
The maximum transmission unit (MTU) is the largest data packet a network device transmits.
When one network device communicates across the Internet with another, the data packets
travel through many devices along the way. If a device in the data path has a lower MTU
setting than the other devices, the data packets have to be split or “fragmented” to
accommodate the device with the smallest MTU.
The best MTU setting for NETGEAR equipment is often the default value. In some situations,
changing the value fixes one problem but causes another. Leave the MTU unchanged unless
one of these situations occurs:
•
You have problems connecting to your ISP or other Internet service, and the technical
support of either the ISP or NETGEAR recommends changing the MTU setting. These
web-based applications might require an MTU change:
•
A secure website that does not open, or displays only part of a web page
•
Yahoo email
•
MSN portal
•
America Online’s DSL service
•
You use VPN and have severe performance problems.
•
You used a program to optimize MTU for performance reasons, and now you have
connectivity or performance problems.
Note:
An incorrect MTU setting can cause Internet communication
problems. For instance, you might not be able to access certain
websites, frames within websites, secure login pages, or FTP or
POP servers.
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If you suspect an MTU problem, a common solution is to change the MTU to 1400. If you are
willing to experiment, you can gradually reduce the MTU from the maximum value of 1500
until the problem goes away. The following table describes common MTU sizes and
applications.
Table 2.
Common MTU Sizes
MTU
Application
1500
The largest Ethernet packet size and the default value. This setting is typical for
connections that do not use PPPoE or VPN, and is the default value for NETGEAR
routers, adapters, and switches.
1492
Used in PPPoE environments.
1472
Maximum size to use for pinging. (Larger packets are fragmented.)
1468
Used in some DHCP environments.
1460
Usable by AOL if you do not have large email attachments, for example.
1436
Used in PPTP environments or with VPN.
1400
Maximum size for AOL DSL.
576
Typical value to connect to dial-up ISPs.
To change the MTU size:
1.
Select
Advanced > Setup > WAN Setup
.
2.
In the MTU Size field, enter a value from 64 to 1500.
3.
Click
Apply
to save the settings.
LAN Setup
The LAN Setup screen allows configuration of LAN IP services such as Dynamic Host
Configuration Protocol (DHCP) and Routing Information Protocol (RIP).
The router is shipped preconfigured to use private IP addresses on the LAN side and to act
as a DHCP server. Following is the router’s default LAN IP configuration:
•
LAN IP address
•
Subnet mask
. 255.255.255.0
These addresses are part of the designated private address range for use in private networks
and are suitable for most applications. If your network requires a different IP addressing
scheme, you can change these settings in the LAN Setup screen.
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N150 4-Port Wireless Router JNR1010
Note:
If you change the LAN IP address of the router while connected
through the browser, you will be disconnected. You must open a new
connection to the new IP address and log in again.
To change the LAN settings:
1.
Select
Advanced > Setup > LAN Setup
to display the following screen:
2.
Enter the settings that you want to customize.
These settings are described in the following section,
LAN Setup Screen Settings
.
3.
Click
Apply
to save your changes.
LAN Setup Screen Settings
You can configure the following LAN settings:
•
LAN TCP/IP Setup
:
•
IP Address
. The LAN IP address of the router.
•
IP Subnet Mask
. The LAN subnet mask of the router. Combined with the IP address,
the IP subnet mask allows a device to know which other addresses are local to it, and
which must be reached through a gateway or router.
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N150 4-Port Wireless Router JNR1010
•
RIP Direction
. Router Information Protocol (RIP) allows a router to exchange routing
information with other routers. This setting controls how the router sends and receives
RIP packets. Both is the default setting. With the Both or Out Only setting, the router
broadcasts its routing table periodically. With the Both or In Only setting, the router
incorporates the RIP information that it receives.
•
RIP Version
. This setting controls the format and the broadcasting method of the RIP
packets that the router sends. It recognizes both formats when receiving. By default,
the RIP function is disabled.
RIP-1 is universally supported. It is adequate for most networks, unless you have an
unusual network setup.
RIP-2 carries more information. Both RIP-2B and RIP-2M send the routing data in
RIP-2 format. RIP-2B uses subnet broadcasting. RIP-2M uses multicasting.
•
Use Router as a DHCP Server
. This check box is selected by default so that the router
functions as a Dynamic Host Configuration Protocol (DHCP) server.
•
Starting IP Address
. Specify the start of the range for the pool of IP addresses in the
same subnet as the router.
•
Ending IP Address
. Specify the end of the range for the pool of IP addresses in the
same subnet as the router.
•
Address Reservation
. When you specify a reserved IP address for a computer on the
LAN, that computer receives the same IP address each time it accesses the router’s
DHCP server. Assign reserved IP addresses to servers that require permanent IP
settings.
Use the Router as a DHCP Server
By default, the router acts as a DHCP server. The router assigns IP, DNS server, and default
gateway addresses to all computers connected to the LAN. The assigned default gateway
address is the LAN address of the router. The router assigns IP addresses to the attached
computers from a pool of addresses specified in this screen. Each pool address is tested
before it is assigned to avoid duplicate addresses on the LAN. For most applications, the
default DHCP and TCP/IP settings of the router are satisfactory.
You can specify the pool of IP addresses to be assigned by setting the starting IP address
and ending IP address. These addresses should be part of the same IP address subnet as
the router’s LAN IP address. Using the default addressing scheme, define a range between
192.168.1.2 and 192.168.1.254, although you might want to save part of the range for
devices with fixed addresses.
The router delivers the following parameters to any LAN device that requests DHCP:
•
An IP address from the range you have defined
•
Subnet mask
•
Gateway IP address (the router’s LAN IP address)
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N150 4-Port Wireless Router JNR1010
•
Primary DNS server (if you entered a primary DNS address in the Internet Setup screen;
otherwise, the router’s LAN IP address)
•
Secondary DNS server (if you entered a secondary DNS address in the Internet Setup
screen)
To use another device on your network as the DHCP server, or to specify the network
settings of all of your computers, clear the
Use Router as DHCP Server
check box and click
Apply
. Otherwise, leave this check box selected. If this service is not enabled and no other
DHCP server is available on your network, set your computers’ IP addresses manually or
they will not be able to access the router.
Address Reservation
When you specify a reserved IP address for a computer on the LAN, that computer always
receives the same IP address each time it accesses the router’s DHCP server. Assign
reserved IP addresses to computers or servers that require permanent IP settings.
To reserve an IP address:
1.
In the Address Reservation section of the screen, click the
Add
button.
2.
In the IP Address field, type the IP address to assign to the computer or server. (Choose an
IP address from the router’s LAN subnet, such as 192.168.1.x.)
3.
Type the MAC address of the computer or server.
Tip:
If the computer is already on your network, you can copy its MAC
address from the Attached Devices screen and paste it here.
4.
Click
Apply
to enter the reserved address into the table.
The reserved address is not assigned until the next time the computer contacts the
router’s DHCP server. Reboot the computer, or access its IP configuration and force a
DHCP release and renew.
To edit or delete a reserved address entry, select the radio button next to the reserved
address that you want to edit or delete and click
Edit
or
Delete
.

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