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50
Appendix A: Troubleshooting
Frequently Asked Questions
Broadband Router with 2 Phone Ports
What is the maximum number of IP addresses that the Router will support?
The Router will support up to 253 IP addresses.
Is IPSec Passthrough supported by the Router?
Yes, enable or disable IPSec Passthrough on the Security => VPN Passthrough tab.
Where is the Router installed on the network?
In a typical environment, the Router is installed between the cable/DSL modem and the local area network (LAN).
Plug the Router into the cable/DSL modem’s Ethernet port.
Does the 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 for LAN to LAN connections, but
those protocols cannot connect from the Internet to the LAN.
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 Router to be used with low cost Internet accounts,
such as DSL or cable modems, when 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 Router support any operating system other than Windows 98, Millennium, 2000, or XP?
Yes, but Linksys does not, at this time, provide technical support for setup, configuration or troubleshooting of
any non-Windows operating systems.
Does the Router support ICQ send file?
Yes, with the following fix: click
ICQ menu
=>
preference
=>
connections
tab=>, and check
I am behind a
firewall or proxy
. Then set the firewall time-out to 80 seconds in the firewall setting. The Internet user can then
send a file to a user behind the Router.
I set up 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. You can
also use a port forwarding range of 7777 to 27900. If you want to use the UT Server Admin, forward another port
(8080 usually works well but is used for remote admin. You may have to disable this.), and 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.
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51
Appendix A: Troubleshooting
Frequently Asked Questions
Broadband Router with 2 Phone Ports
Can multiple gamers on the LAN get on one game server and play simultaneously with just one public IP
address?
It depends on 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”
added 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 to the local IP address of the server computer.
How can I block corrupted FTP downloads?
If you are experiencing corrupted files when you download a file with your FTP client, try using another FTP
program.
The web page hangs; downloads are corrupt, or nothing but junk characters are being displayed on the
screen. What do I need to do?
Force your Ethernet adapter to 10Mbps or half duplex mode, and turn off the “Auto-negotiate” feature of your
Ethernet adapter as a temporary measure. (Please look at the Network Control Panel in your Ethernet adapter’s
Advanced Properties tab.) Make sure that your proxy setting is disabled in the browser. Check our website at
www.linksys.com
for more information.
If all else fails in the installation, what can I do?
Reset the Router by holding down the Reset button for thirty seconds. Then reset your cable or DSL modem by
powering the unit off and then on.
Will the Router function in a Macintosh environment?
Yes, but the Router’s setup pages are accessible only through Internet Explorer 5.0 or Netscape Navigator 5.0 or
higher for Macintosh.
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, and make
sure that your browser is set to connect directly and that any dial-up is disabled. Make sure that your browser is
set to connect directly and that any dial-up is disabled. For Internet Explorer, click
Tools
,
Internet Options
, and
then the
Connection
tab. Make sure that Internet Explorer is set to
Never dial a connection
. For Netscape
Navigator, click
Edit
,
Preferences
,
Advanced
, and
Proxy
. Make sure that Netscape Navigator is set to
Direct
connection to the Internet
.
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52
Appendix A: Troubleshooting
Frequently Asked Questions
Broadband Router with 2 Phone Ports
What is DMZ Hosting?
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 static IP if you
want to use DMZ Hosting. To get the LAN IP address, see “Appendix C: Finding the MAC Address and IP Address
for Your Ethernet Adapter.”
If DMZ Hosting 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.
How many ports can be simultaneously forwarded?
Theoretically, the Router can establish 520 sessions at the same time, but you can only forward 10 ranges of
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 is the maximum number of VPN sessions allowed by the Router?
The maximum number depends on many factors. At least one IPSec session will work through the Router;
however, simultaneous IPSec sessions may be possible, depending on the specifics of your VPNs.
How can I check whether I have static or DHCP IP addresses?
Ask your ISP to find out.
How do I get mIRC to work with the Router?
Under the Applications & Gaming => Port Range Forward tab, set port forwarding to
113
for the PC on which you
are using mIRC.
If your questions are not addressed here, refer to
the AT&T website,
,
or the Linksys website,
www.linksys.com
.
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53
Appendix B: Finding the MAC Address and IP Address for Your Ethernet Adapter
Windows 98 or Me Instructions
Broadband Router with 2 Phone Ports
Appendix B: Finding the MAC Address and IP Address for Your
Ethernet Adapter
This section describes how to find the MAC address for your computer’s Ethernet adapter so you can use the MAC
filtering and/or MAC address cloning feature of the Router. You can also find the IP address of your computer’s
Ethernet adapter. This IP address is used for the Router’s filtering, forwarding, and/or DMZ features. Follow the
steps in this appendix to find the adapter’s MAC or IP address in Windows 98, Me, 2000, or XP.
Windows 98 or Me Instructions
1.
Click
Start
and
Run
. In the
Open
field, enter
winipcfg
. Then press the
Enter
key or the
OK
button.
2.
When the
IP Configuration
screen appears, select the Ethernet adapter you have connected to the Router via a
CAT 5 Ethernet network cable.
3.
Write down the Adapter Address as shown on your computer screen. This is the MAC address for your
Ethernet adapter and is shown as a series of numbers and letters.
The MAC address/Adapter Address is what you will use for MAC address cloning or MAC filtering.
The example shows the Ethernet adapter’s IP address as 192.168.1.100. Your computer may show something
different.
Windows 2000 or XP Instructions
1.
Click
Start
and
Run
. In the
Open
field, enter
cmd
. Press the
Enter
key or click the
OK
button.
2.
At the command prompt, enter
ipconfig /all
. Then press the
Enter
key.
Figure B-2: MAC Address/Adapter
Address
Figure B-1: IP Configuration Screen
Note:
The MAC address is also called the Adapter Address.
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54
Appendix B: Finding the MAC Address and IP Address for Your Ethernet Adapter
For the Router’s Web-based Utility
Broadband Router with 2 Phone Ports
3.
Write down the Physical Address as shown on your computer screen; it is the MAC address for your Ethernet
adapter. This appears as a series of numbers and letters.
The MAC address/Physical Address is what you will use for MAC address cloning or MAC filtering.
The example shows the Ethernet adapter’s IP address as 192.168.1.100. Your computer may show something
different.
For the Router’s Web-based Utility
You can use MAC or IP addresses to designate computers for each Internet Access Policy you create. To specify a
computer, enter its IP address or 12-digit MAC address.
For MAC address cloning, enter the 12-digit MAC address in the
User Defined Entry
fields, two digits per field.
For more details, refer to “Chapter 5: Configuring the Router.”
Figure B-3: MAC Address/Physical Address
Figure B-4: Access Restrictions - MAC and
IP Addresses
Note:
The MAC address is also called the Physical Address.
Figure B-5: MAC Address Clone
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