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Page 66 / 94 Scroll up to view Page 61 - 65
54Mbps Wireless Router Model KWGR614 Reference Manual
5-8
Advanced Configuration of the Router
v1.2, September 2006
If you are willing to risk open access, the WAN Setup menu shown below lets you configure a
Default DMZ Server.
To assign a computer or server to be a Default DMZ server, follow these steps:
1.
Click the WAN Setup link on the Advanced section of the main menu.
2.
Check the Default DMZ Server box and type the IP address for that server. To remove the
default DMZ server, uncheck the Default DMZ Server box.
3.
Click
Apply
.
Disabling the SPI Firewall
The SPI (Stateful Packet Inpection) Firewall protects your LAN against Denial of Service
attacks. This should only be disabled in special circumstances.
Responding to Ping on the Internet WAN Port
If you want the router to respond to a 'ping' from the Internet, click the ‘Respond to Ping on
Internet WAN Port’ check box. This should only be used as a diagnostic tool, since it allows your
router to be discovered. Do not check this box unless you have a specific reason to do so.
Figure 5-5
Page 67 / 94
54Mbps Wireless Router Model KWGR614 Reference Manual
Advanced Configuration of the Router
5-9
v1.2, September 2006
Setting the MTU Size
The default MTU size is usually fine. The normal MTU (Maximum Transmit Unit) value for most
Ethernet networks is 1500 Bytes. For some ISPs, particularly some using PPPoE, you may need to
reduce the MTU to 1492. This should not be done unless you are sure it is necessary by your ISP.
Any packets sent through the router that are larger than the configured MTU size will be
repackaged into smaller packets to meet the MTU requirement. To change the MTU size:
1.
Under MTU Size, enter a new size between 64 and 1500.
2.
Click
Apply
to save the new configuration.
Using the LAN IP Setup Options
The second feature category under the Advanced heading is LAN IP Setup. This menu allows
configuration of local TCP/IP addresses, DHCP and address reservation. From the Main Menu of
the browser interface, under Advanced, click on LAN IP Setup to view the LAN IP Setup menu,
shown below.
Figure 5-6
Page 68 / 94
54Mbps Wireless Router Model KWGR614 Reference Manual
5-10
Advanced Configuration of the Router
v1.2, September 2006
Configuring LAN TCP/IP Setup Parameters
The router is shipped preconfigured to use private IP addresses on the LAN side, and to act.as a
DHCP server. The router’s default LAN IP configuration is:
•
LAN IP addresses—192.168.1.1
•
Subnet mask—255.255.255.0
These addresses are part of the IETF-designated private address range for use in private networks,
and should be suitable in most applications. If your network has a requirement to use a different IP
addressing scheme, you can make those changes in this menu.
The LAN IP parameters are:
•
IP Address.
This is the LAN IP address of the router.
•
IP Subnet Mask.
This is 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.
Using the Router as a DHCP server
By default, the router will function as a DHCP (Dynamic Host Configuration Protocol) server,
allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to
the router's LAN. The assigned default gateway address is the LAN address of the router. IP
addresses will be assigned to the attached computers from a pool of addresses specified in this
menu. 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. See
“Internet Networking and TCP/IP Addressing” in Appendix B
for an explanation of DHCP and
information about how to assign IP addresses for your network.
If another device on your network will be the DHCP server, or to manually configure the network
settings of all of your computers, clear the ‘Use router as DHCP server’ check box. Otherwise,
leave it checked.
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, you should define a range between 192.168.1.2 and
192.168.1.253, although you may wish to save part of the range for devices with fixed addresses.
Note:
If you change the LAN IP address of the router while connected through the
browser, you will be disconnected. You must then open a new connection to
the new IP address and log in again.
Page 69 / 94
54Mbps Wireless Router Model KWGR614 Reference Manual
Advanced Configuration of the Router
5-11
v1.2, September 2006
The router will deliver 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)
•
Primary DNS Server (if you entered a Primary DNS address in the Basic Settings menu;
otherwise, the router’s LAN IP address)
•
Secondary DNS Server (if you entered a Secondary DNS address in the Basic Settings menu
Using Address Reservation
When you specify a reserved IP address for a computer on the LAN, that computer will always
receive the same IP address each time it accesses the router’s DHCP server. Reserved IP addresses
should be assigned to servers that require permanent IP settings.
To reserve an IP address:
1.
Click the
Add
button.
2.
In the IP Address box, type the IP address to assign to the computer or server. Choose an IP
address from the router’s LAN subnet, 192.168.1.X.
3.
Type the MAC Address of the computer or server.
4.
Click
Apply
to enter the reserved address into the table.
Note: The reserved address will not be 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:
1.
Click the button next to the reserved address you want to edit or delete.
2.
Click
Edit
or
Delete
.
Tip:
If the computer is already present on your network, you can copy its MAC
address from the Attached Devices menu and paste it here.
Page 70 / 94
54Mbps Wireless Router Model KWGR614 Reference Manual
5-12
Advanced Configuration of the Router
v1.2, September 2006
Using a Dynamic DNS Service
If your network has a permanently assigned IP address, you can register a domain name and have
that name linked with your IP address by public Domain Name Servers (DNS). However, if your
Internet account uses a dynamically assigned IP address, you will not know in advance what your
IP address will be, and the address can change frequently. In this case, you can use a commercial
dynamic DNS service, which will allow you to register your domain to their IP address, and will
forward traffic directed at your domain to your frequently-changing IP address.
The router contains a client that can connect to many popular dynamic DNS services. You can
select one of these services and obtain an account with them. Then, whenever your ISP-assigned
IP address changes, your router will automatically contact your dynamic DNS service provider,
log in to your account, and register your new IP address.
To configure Dynamic DNS:
1.
From the Main Menu of the browser interface, under Advanced, click on Dynamic DNS.
2.
Register for an account with one of the dynamic DNS service providers whose names appear
in the ‘Service Provider’ box. For example, for dyndns.org, go to www.dyndns.org.
Note:
If your ISP assigns a private WAN IP address (such as 192.168.x.x or 10.x.x.x), the
dynamic DNS service will not work because private addresses will not be routed
on the Internet.
Figure 5-7

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