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Page 16 / 25 Scroll up to view Page 11 - 15
EtherFast Cable/DSL Router
27
Instant Broadband Series
26
DMZ Host
The DMZ Host setting allows one local user to be exposed to the Internet to
use a special-purpose service such as Internet gaming or Video-conferencing.
To expose one computer, enter the computer’s IP address and click the
Apply
button. Inactivate DMZ by entering a zero.
2.
Enter the following data to create a new static route:
Destination LAN IP
The Destination LAN IP is the Address of the remote
network or host to which you want to assign a static route. Enter the IP
address of the host for which you wish to create a static route here. If you
are building a route to an entire network, be sure that the network portion
of the IP address is set to zero. For example, the Router’s standard IP
address is 192.168.1.1. Based on this address, the address of the network
to which the Router is connected is 192.168.1, with the last digit (1, in
this case) determining the Router’s place on the network. Therefore you
would enter the IP address 192.168.1.0 if you wanted to route to the
Router’s entire network, rather than just to the Router.
Network Mask
The Network Mask (also known as the Subnet Mask)
determines which portion of an IP address is the network portion, and
which portion is the host portion. In the example above, the Network
Mask is 255.255.255.0. This determines (by using the values 255) that the
first three numbers of an network IP address identify this particular net-
work, while the last digit (from 1 to 254) would identify the specific host.
Gateway IP
This IP address should be the IP address of the gateway
device that allows for contact between the Router and the remote network
or host.
3. Click the
Apply
button to save your changes.
Page 17 / 25
EtherFast Cable/DSL Router
29
Troubleshooting
Common Problems and Solutions
This section provides possible solutions to problems regarding the installation
and operation of the Cable/DSL Router. Read the description below to solve
your problems. If you can’t find an answer here, check the Linksys website at
www.linksys.com.
1. I Can’t connect to the Cable/DSL Router.
• Verify that the Cable/DSL Router is properly installed, LAN connec-
tions are OK, and it is powered ON.
• Make sure that your PC and the Cable/DSL Router are on the same net-
work segment. If you are not sure, initiate the DHCP function and let
the PC get the IP address automatically.
• Make sure that your PC is using an IP address within the default range
of 192.168.1.2 to 192.168.1.254 and thus compatible with the
Cable/DSL Router default IP Address of 192.168.1.1.
• The Subnet Mask should be set to 255.255.255.0 to match the
Cable/DSL Router. In the Cable/DSL Router, you can check these set-
tings by using Control Panel-Network to check the Properties for the
TCP/IP protocol.
2. The Diag LED stays lit when it shouldn’t.
• The Diag LED lights up when the device is first powered up.
Meantime, the system will boot up itself and check for proper opera-
tion. After finishing the checking procedure, the LED turns off to show
the system is working fine. If the LED remains lit after this time, the
device is not working properly. Try to re-flash the firmware by assign-
ing a static IP address to the computer, then upgrade the firmware
again. If that doesn’t help, contact your dealer for further information.
Instant Broadband Series
The QoS (Quality of Service) settings allow you to prioritize performance.
To use QoS, select
Enable
. There are five preset applications which utilize
QoS: FTP, HTTP, Telnet, SMTP, and POP3. You can choose three additional
applications by inputing that information in the empty boxes below.
You can also prioritize up to four ports with the Port-based QoS. The
Router±s other four ports are automatically assigned Low Priority.
28
Quality of Service
Page 18 / 25
EtherFast Cable/DSL Router
31
Instant Broadband Series
30
Frequently Asked Questions
What is the maximum number of IP addresses and users supported by the
Cable/DSL Router?
The Router supports up to 253 IP addresses and users.
Where is the Cable/DSL Router installed on the network?
In a typical environ-
ment, the Router is installed between the Cable/DSL Modem and the LAN.
Plug the Cable/DSL Router into the Cable/DSL Modem's Ethernet port.
Does the Cable/DSL Router support IPX or AppleTalk?
No. TCP/IP is the only
protocol standard for the Internet and has become the global standard for
communications. IPX, a NetWare communications protocol used only to
route messages from one node to another, and AppleTalk, a communications
protocol used on Apple and Macintosh networks, can be used from LAN to
LAN connections, but those protocols cannot connect from WAN to LAN.
Does the WAN connection of the Cable/DSL Router support 100Mb Ethernet?
Because of the speed limitations of broadband Internet connections, the
Cable/DSL Router’s current hardware design supports 10Mb Ethernet on its
WAN port. It does, of course, support 100Mbps over in the auto-sensing
Fast Ethernet 10/100 switch on the LAN side of the Router.
What is
Network Address Translation
and what is it used for?
Network
Address Translation (NAT) translates multiple IP addresses on the private
LAN to one public address that is sent out to the Internet. This adds a level
of security since the address of a PC connected to the private LAN is never
transmitted on the Internet. Furthermore, NAT allows the Cable/DSL Router
to be used with low cost Internet accounts, such as cable or DSL modems,
where only one TCP/IP address is provided by the ISP. The user may have
many private addresses behind this single address provided by the ISP.
Does the Cable/DSL Router support any operating system other than Windows
95, Windows 98, Windows 2000, or Windows NT?
Yes, but Linksys does not, at
this time, provide technical support for setup, configuration or troubleshoot-
ing of any non-Windows operating systems.
Does the Cable/DSL Router support ICQ send file?
Yes, with the following fix:
ICQ menu-> preference -> connections tab-> check "I am behind a firewall
or proxy", and set the firewall time-out to 80 seconds in firewall setting.
The Internet user can then send a file to a user behind the Router.
3. I can’t browse through the Cable/DSL Router.
• Make sure that both ends of the network cable and power adapter are
properly connected and that the status LEDs on the front panel are
functioning properly.
• If using Windows 95 or Windows 98, check the TCP/IP setup on the
client side. Run "
winipcfg
" by clicking on the
Start
button, then select-
ing
Run
. The PC should have an IP address of 192.168.1.xxx ("xxx" is
from 2 to 254.) Subnet Mask is 255.255.255.0, the default gateway IP
should be the Router’s IP Address, and DNS (in "More".)
• Make sure that the same values are in the Status screen of the
Cable/DSL Router’s web-based utility.
4. When I enter a URL or IP address, I get a time out error.
• Make sure that the other PCs work. If they do, ensure that your work-
stations IP settings are correct (IP address, Subnet Mask, Default gate-
way and DNS)
• If the PCs are configured correctly, but still not working, check the
Cable/DSL Router to make sure that it is connected and ON. Once this
is the case, check its settings. (If you cannot connect to the Router,
check the LAN and power connections.)
• If the Cable/DSL Router is configured correctly, check your Internet
connection (the Cable/DSL modem) to see that it is working correctly.
5. I can’t obtain an IP address from my cable or DSL modem.
• Make sure that all of your cabling is properly connected and that all of
the Router’s WAN and LAN LEDs are correctly illuminated.
• Power down your cable or DSL modem for a few seconds. Turn it back
on. After the modem goes through its self-test, check to see that you
now have an IP address.
• Make sure that your cable or DSL modem is DHCP-capable.
• You may have to enter the Router or host name in the Setup page of the
Router’s web-based utility. Go to page 16 for more information.
• Your ISP may require Mac Addresses. Check with your ISP. This
address can be obtained in the Status screen of the Router’s Web-based
Utility.
Page 19 / 25
EtherFast Cable/DSL Router
If all else fails in the installation, what can I do?
Reset the Router by holding
down the reset button for at least three seconds and reset your cable or DSL
modem by powering the unit off and then on.
Obtain and flash the latest
firmware release that is readily available on Linksys website,
www.linksys.com.
How can I find upgrades to the Router’s firmware?
All Linksys firmware
upgrades are posted on the Linksys website at www.linksys.com, where
they can downloaded for free.
The Router's firmware can be upgraded with
TFTP programs.
Does the Cable/DSL Router support IPsec?
No, not currently.
An IPsec pass
thru solution is being developed by Linksys.
Will the Router function in a Macintosh environment?
Yes, but the Router's
setup pages are accessible only through Internet Explorer or Netscape
Navigator, versions 4.0 or higher for Macintosh.
With which type of firewall is the Router equipped?
The Cable/DSL Router
uses NAT and TCP/IP port inspections.
Does the Router do stateful packet inspection?
No
I am not able to get the web configuration screen for the Router.
What can I do?
You may have to remove the proxy settings on your Internet browser, e.g.,
Netscape Navigator or Internet Explorer.
Or remove the dial-up settings on
your browser.
Check with your browser documentation.
What is DMZ?
Demilitarized Zone (DMZ) allows one IP Address (computer)
to be exposed to the Internet.
Some applications require multiple TCP/IP
ports to be open.
It is recommended that you set your computer with a stat-
ic IP if you want to use DMZ.
If DMZ is used, does the exposed user share the public IP with the Router?
No.
Does the Router pass PPTP packets or actively route PPTP sessions?
The
Router allows PPTP packets to pass through.
Is the Router cross-platform compatible?
Any platform that supports Ethernet
and TCP/IP is compatible with the Router.
33
Instant Broadband Series
32
How do I get Napster to work with the Router?
Napster is fully compatible
with the Router and requires no special settings.
I setup an Unreal Tournament Server, but others on the LAN cannot join. What do
I need to do?
If you have a dedicated Unreal Tournament server running,
you need to create a static IP for each of the LAN computers and forward
ports 7777, 7778, 7779, 7780, 7781, and 27900 to the IP address of the
server. If you want to use the UT Server Admin, forward another port (8080
usually works well), then in the [UWeb.WebServer] section of the server.ini
file, set the ListenPort to 8080 (to match the mapped port above) and
ServerName to the IP assigned to the Router from your ISP.
Can multiple gamers on the LAN get on one game server and play simultaneous-
ly with just one public IP address?
It depends on the which network game or
what kind of game server you are using.
For example, Unreal Tournament
supports multi-login with one public IP.
How do I get
Half-Life: Team Fortress
to Work with the Router?
The default
client port for Half-Life is 27005.
The computers on your LAN need to
have "+clientport 2700x" to the HL shortcut command line; the x would be
6, 7, 8, and on up. This lets multiple computers connect to the same server.
One problem:
version 1.0.1.6 won't let multiple computers with the same
CD key connect at the same time, even if on the same LAN (not a problem
with 1.0.1.3).
As far as hosting games, the HL server does not need to be in
the DMZ. Just forward port 27015 or 27016 to the local IP of the server
computer. There remains, however, a problem with people being booted
after a few minutes with an "illegible server message."
How can I not receive corrupted FTP downloads?
If you are experiencing cor-
rupted files when you download a file with your FTP client, try using
another FTP program.
Web page hangs, corrupt downloads, or nothing but junk characters are being
displayed on the screen. What do I need to do?
Force your NIC to 10Mbps
or half duplex mode, and turn off the "Autonegotiate" feature of your NIC
as a temporary measure.
(Please look at the Network Control Panel, in your
Ethernet Adapter's Advanced Properties tab.).
Check our website at
www.linksys.com for more information.
Page 20 / 25
EtherFast Cable/DSL Router
35
Instant Broadband Series
Will the Router allow me to use my own public IPs and Domain, or do I have to
use the IPs provided by the Router?
The router mode allows for customiza-
tion of your public IPs and Domain.
How many ports can be simultaneously forwarded?
Theoretically, the Router
can establish 520 sessions at the same time, but you can only forward 10
ports.
Does the Router replace a modem?
Is there a cable or DSL modem in the
Router?
No, this version of the Router must work in conjunction with a
cable or DSL modem.
Which modems are compatible with the Router?
The Router is compatible with
virtually any cable or DSL modem that supports Ethernet.
What are the advanced features of the Router?
The Router's advanced features
include Filters, Forwarding, Dynamic Routing, Static Routing, DMZ host
and QoS.
What is the maximum number of VPN sessions allowed by the Router?
At least
one session.
How big is the memory buffer on the Router?
512kb.
Does Linksys provided syslog support?
No, Linksys does not currently provide
syslog support.
How can I check whether I have static or DHCP IP Addresses?
Consult your ISP
to confirm the information.
How do I get mIRC to work with the Router?
Set port forwarding to 113 for the
computer on which you are using mIRC.
34
Appendix
How to Ping Your ISP’s E-mail & Web Addresses
Virtually all Internet addresses are configured with words or characters (i.e.,
www.linksys.com, www.yahoo.com, etc.) In actuality, however, these Internet
addresses are assigned to IP addresses, which are the true addresses on the
Internet. For example, www.linksys.com is actually 206.135.116.3. Type it
into your web browser and you will wind up at the Linksys home page every
time.
IP and web addresses, however, can sometimes be long and hard to remem-
ber. Because of this, certain ISPs will shorten their server addresses to single
words or codes on their users’ web browser or e-mail configurations. If your
ISP’s E-mail and Web server addresses are configured with single words
(“www”, “e-mail”, “home”, “pop3”, etc.) rather than whole Internet
Addresses or IP Addresses, the Router may have problems sending or receiv-
ing mail and accessing the Internet. This happens because the Router has not
been configured by your ISP to accept their abbreviated server addresses.
The solution is to determine the true web addresses behind your ISPs code
words. You can determine the IP and web addresses of your ISP’s servers by
“pinging” them.
If you don’t have your ISP’s web and e-mail IP Addresses, you
must
either get them from your ISP or follow these steps
prior
to connecting the Cable/DSL Router to your network.
Step One: Pinging for an IP Address
The first step to determining your ISP’s web and e-mail server address is to
ping its IP Address.
1.
Power on the computer and the cable or DSL modem
, and restore the
network configuration set by your ISP if you have since changed it.
2.
Click Start
, then
Run,
and type "command". This will bring up the DOS
Window.

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