I have a belkin F6D4230-4 router. I have an ISA 2006 Server/ Firewall connected directly to the DSL modem. The Belkin is connected to my network through a switch. I am able to connect to my network servers from my laptop but not able to surf the internet. Can this router be configured to allow my laptop to surf the net or does this router have to physically be connected to the DSL modem.

I don't have an old modem........what should I do to configure my new belkin F9J1001v1 router+modem

Your MT 882 modem most likely has a DHCP Server that will interfere with the ip address of the router. Did you plug the Router directly into the laptop then go to dos prompt and type in ipconfig/renew . Or reboot the laptop !
Then type in 192.168.2.1 into browser
You need to work out the IP address of your 882 modem and then change the dhcp server leases on it to start at 20 like it might be 10.0.0.1 to 1.0.0.254 or it could be 192.168.1.1 to 192.168.1.254 .
if you are planning on using both devices on the network !
Make the Modem DHCP start at 192.168.2.20 to 192.168.2.254 and then make the Belkin router / modem ip address be 192.168.2.2 and the 882 modem 192.168.2.1 if you plan on using the two devices together on the network disable the belkin dchp server.
if you are using just the belkin then the reboot or ipconfig/ renew will be all you need .

Connect your computer directly to your cable or DSL modem. If you see a log-in screen for your Internet Service Provider, make a note of the user name and password.

Unplug your router and your cable or DSL modem.

Plug your modem to your Belkin router's "WAN" port. Connect your computer to one of your Belkin router's numbered ports.

Turn on in your modem and wait 10 seconds. Plug in your router and restart your computer.

Select "Start," then "Control Panel" and then "Network Connections." Right-click "Local Area Connection" to bring up your network connection properties.

Click "Internet Protocol (TCP/IP)," then "Obtain an IP Address Automatically" and then "Obtain DNS Server Addresses Automatically."

Open your web browser. If you are prompted for a user name and password, enter the information you recorded in Step 1

Hello,
Connect your computer directly to your cable or DSL modem. If you see a log-in screen for your Internet Service Provider, make a note of the user name and password. Unplug your router and your cable or DSL modem. Plug your modem to your Belkin router's "WAN" port. Connect your computer to one of your Belkin router's numbered ports. Turn on in your modem and wait 10 seconds. Plug in your router and restart your computer. Select "Start," then "Control Panel" and then "Network Connections." Right-click "Local Area Connection" to bring up your network connection properties. Click "Internet Protocol (TCP/IP)," then "Obtain an IP Address Automatically" and then "Obtain DNS Server Addresses Automatically. Open your web browser. If you are prompted for a user name and password, enter the information you recorded in Step 1.

If you can access the configuration page of your belkin router you have to copy the MAC address of your computer to the router. The router has the capability to clone the MAC address. It's because if you have a cable internet connection the MAC address is registered in the server.

NAT translation makes it possible for more than one computer to "share" your Internet connection.

So, if you only have one computer, and that computer is not using a "wireless" connection, you can physically remove the router from your network., i.e., connect the DSL-modem or cable-modem directly to the Ethernet port on your computer.

Note that both Mac OS X and Windows XP/Vista/7 have a "built-in" firewall, which is enabled, and which functions just as well as the firewall "inside" the router. So, removing the router from your network does not make you any less "secure".

1) With direct connect with modem, check the IP address and default gateway.
(I came across such a modem, it gave default gateway as 192.168.1.254)
I also had the doubt of configuring as a dynamic connection
But it won't work!
Contact your ISP to completely bridge the modem and configure the dsl modem as PPPoE connection with correct username and password.
Finally connect the modem to router and do a complete network power cycle, i.e.: Unplug power from router 1st, then power from modem, unplug the telephone line and now do the exact reverse process... Plug back the tel. cable, then power to modem... now WAIT for lights on modem to come back, then plug in the power to router. This will surely work.

• this problem can be ISP releted they may have some issues on the ADSL line connection
  

Connect network cable from your current DSL modem to the WAN port (or internet port) on the back of the wireless router. It should detect the connection automatically.
If not, then try running the CD software that came with the device. It should setup everything correctly.

I would go to run and type in cmd. then type in ipconfig, I believe that is right for windows 98. I would look on there and see if that is getting a correct IP and if the DNS server says 192.168.0.1 if it is a belkin router. ipconfig /? will give you the commands you can use with that. There is a ipconfig /renew that will refresh them all. You might have it set to be a static IP and you would want it to be dynamic and have it refresh by itself. You can go to http://hippo.colorado.edu/info/ipsetup/staticip_setup.cgi?os=win98 for directions to change it to dynamic, I would just do the opposite of what they suggest to make it auto config. It sounds like it is looking for a previous DNS server which is not there anymore because the DSL connection reset.