Router connection problems

Limlove February 2, 2009 at 12:44:57
Specs: Windows XP
I have purchased a laptop and was hoping to set up a wireless connection from my modem downstairs that is currently connected to my windows xp desktop computer.
Hence, I went out and bought a netgear router as I was told this one was the best for my cable modem connection and requirements.
The only problem is, my modem is connected to my desktop computer by a USB port, not an ethernet connection as my desktop computer does not have this.
In the set-up guide I got with the router I am told to connect the router to my desktop computer via an ethernet cable.
As I didn't have an ethernet port, I again went out and bought a USB 2.0 to RJ45 LAN Adaptor.
So currently, the modem is connected to the router with a wire provided and the router is connected to my desktop computer via an ethernet cable with an adaptor.
However, the connection still doesn't work.
Please help!!

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February 2, 2009 at 13:34:52
Not a bad way to do it. There are plenty of ways.

Before I get too far along. We would need to know if your old config used a Private IP address or Public IP address. Also do you know your user name and password. Don't tell me the answers just yes or no.

How I would get it to connect if possible.

The modem would act as pass-through. I'd log on to the modem and change it from the point of connection to a passive device.
I'd put the user log on info into the router and use it to connect or be the point of connection. (some have what is called smart connect)

The modem would be connected to the router's wan port with a crossover cable. (not always needed but just for becuase)

Then I'd setup the router to provide ip address's to my wireless and wired computers in a small range in private ip's. You only need a few. I set lease times long.

Then connect desktop to router and set network card (usb adapter) to dhcp.

Try to connect. Set firewall features.

Then I'd work on wireless. Get it to connect then set encryption and firewalls.

"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

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February 2, 2009 at 15:14:13
See the manual for the modem. When you have only one computer connecting to the modem, a usb connection to the modem is fine, but when you are trying to go through the router to connect to the modem and to more than one computer, as far as I know you can't use the usb connection (unless the router has a USB port) - I've never seen a modem with a USB connection that doesn't also have a wired RJ45 port - you probably must connect the modem to the router's WAN port via a network cable, and the router to the computers, either via a wired or a wireless network connection.

If your desktop computer has spare slots, a wired PCI 10/100 network card can cost less than $20 - that's probably a lot less than it cost you for the laptop adapter, laptops often don't have enough USB ports in the first place (hubs that plug into one port DO NOT work with everything), and if connected wirelessly to the router, you could connect the laptop to the internet wirelessly anywhere within range of the router, rather than only where you can plug in a network cable.

In that case you could connect the desktop to the router via a network cable, the modem to the WAN port on the router via a network cable, and connect to the laptop wirelessly.
Or - you could spend more bucks and get a wireless PCI adapter for the desktop computer, but it's recommended at least one of your computers is connected via a cable to the router for the best wireless connection reliability.

You need to access the router's configuration inside the router initially - the wireless in the router is often turned off when you first get it. You have to connect a network cable between the router and a wired network port, and go into your browser on either the desktop (if you install a network card on it), or on the laptop (if you use the wired network adapter on it) and type something to access the router's configuration - e.g. - that's specified in the router's manual - it doesn't matter if you don't have an internet connection at that time. You supply a username and password - that's in the router's manual. You have to set up the router's configuration according to what your ISP requires for the WAN connection to the wired network adapter.Then you need to turn the wireless broadcasting of the router on and set up the SSID and encryption for it, etc. Write down the code you used.
e.g. 10 characters for WEP 64 bit, 26 characters for WEP 128 bit.
Some routers can generate a random code for you.

Once the router is broadcasting a wireless signal you can search for available wireless connections on the laptop in My Network Places.
Choose the one that has the SSID of your router config - you will be told the connection is secure or similar and you need to supply a code - enter the code that's in the router's configuration that you wrote down.

See the FULL manual for the router, the manual for the modem, your ISP's instructions about how to set up your network settings, router settings etc., and the help in Windows about wireless connections.

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February 2, 2009 at 15:53:00
Or, you could use the USB wired network adapter with the desktop instead of the laptop, since it's a USB adapter (and not use the usb connection from the modem to the desktop).

"The modem would be connected to the router's wan port with a crossover cable."

That varies - at least some of the modems I've connected require a straight through cable for that, but some routers (D-Link, LinkSys?) have auto sensing ports and will work with either type.
The network cable type that came with the modem will work with WAN port on the router for sure.

In any case, if the led for the port goes on, the connection is working.

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February 3, 2009 at 07:57:57
Thanks for your help! But I still can't seem to get my connection to work. I have a public IP address, but I don't know the username and password. I decided to see if the problem was with USB to RJ45 LAN adaptor I bought so connected my modem to my desktop set up as follows: Modem to ethernet cable to adaptor to desktop. So basically, i just decided to forget about the router and see if the connection would work through an ethnernet cable, but it doesn't. I don't really understand what the problem is because in theory it should work, but it doesn't. Any ideas? :)

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February 3, 2009 at 19:30:57
Windows (on each computer) only allows you to connect to the internet one way at a time; at least, I know of no way to connect more than way at a time to one ISPs one account.
You were connected via USB - you have to change that to via a wired network adapter connection, when you are using one.
(When you are connected via a single wired connection to the modem, you have to do this as well if you change to a single wireless connection to the modem (if the modem is both wired/wireless - I have not seen one). When you have a router between the computers and the modem, all of the connections to the router can connect to the internet once one connection to the internet has been set up, but you can only use one type of connection between the computers and the router, so you stll have to do this on the computer you change the type of connection on.)

When you change the type of wired network connection (or change it from wired to wireless or visa versa) to the internet, you have to go to Tools - Internet Options in IE (or to Control Panel - Internet Options),
select the Connections tab, click on Setup at the top, and select the appropriate settings.
In your case, with the USB wired adapter installed properly on the desktop (follow the installation directions - e.g. you often have to install software for it, THEN you plug it in, or it won't install properly - you may be required to reboot the computer at some point as well before the adapter will actually work), and with the adapter connected by cable to the modem , you would
choose Connect to the Internet on the first screen (where you can select something)
- 2nd - Getting Ready Screen - what you choose depends on your ISP situation - in my case I would choose Setup a connection manually
- 3rd - Internet Connection screen - in my case, and probably yours, my Broadband connection is always on, so I would choose that.
(When you connect through a router to the modem the settings you choose are slightly different - you choose connect to the internet through a local network (LAN), which in turn connects to the modem).

You MAY need to look at the manual for the modem, and change some setting, but I didn't have to do that at a place I help out that has a Motorola cable modem that has both a USB and a RJ45 port.

If the ISP required TCP/IP network settings for your network adapter are the default Windows ones like mine are, your internet connection should then work, but you may have to reboot the computer first.

If the ISP required TCP/IP network settings for your network adapter are NOT the default Windows ones, your internet will NOT work, until you set those TCP/IP settings to those settings required by the ISP.

You change those by going to Control Panel - Network connections (or My Network Places - Network connections)
RIGHT click on the adapter with name of the USB adapter, choose Properties
double click on Internet Protocol (TCP/IP), change the default settings to those the ISP requires.

In my case, my ADSL ISP (Telus, in Canada) uses default settings for those. The biggest local cable ISP (Shaw) also uses default settings there.

For the ADSL ISP, I, or software on my behalf, must submit the MAC address (the unique identifier code all network devices divulge when queried) to them of at least one network adapter or other networking device. The first time you set up a connection using the ISPs supplied software, that's done automatically. This ISP allows you to register two MAC addresses, max
- e.g. you can have two computers, each with their own network adapter, connected via them connectioning via cables to/through a network hub or switch, connected via a network cable to the ADSL modem.
If you change network adapters the MAC address changes - you have to either run the ISP's software again, or go to a specific site on the web that works regardless of whether you can connect to the internet otherwise and change the MAC address there, or register a second MAC address there if you want to do that.

When you connect through a router to a modem to the ADSL ISP, or through a combo modem/router, the situation is different. The ISP (and anyone else accessing your computer from the web) can normally only see one networking device (unless both ends use remote access software, or bad guys utilize security flaws in the Windows software) - you either use the MAC address of the router or router/modem, or you CLONE the MAC address of a single computer's adapter e.g., that you have a network cable connected to at the time, or you can simply enter a MAC address of an adapter that has already been registered with the ISP.

In my case I started out with just one connection to the internet, via a network card connected by cable to a modem.
When I later connected a router (when I found out the advantages of using one) between the computer and the modem, I cloned the MAC address of that same network adapter in the router's configuration.
Now I have as many as 4 computers connected to a wired router at a time, or as many as 5 computers to a wirelss router at a time (the routers have had 4 wired ports; I have had one wireless connection as well sometimes ) - if they had more ports, or more computers with more wireless adapters, I could connect more computers, or you can connect more network hubs or switches to the router, etc., etc.
Ever since the first time, I have either cloned the MAC address of the original adapter in a router's config, or I have entered it manually. I can then plug any computer into the router, or into any hub or switch connected to the router, without having to register a new MAC address or add one. I can swap routers that already have been setup with the right MAC address and settings as I please. The ISP has no idea how many computers I have connected, but on the other hand, there's never more than myself and my Dad using a computer at the same time at my place.

The cable ISP only requires the serial number of the Motorola modem be registered with them, which is apparently divulged if it's queried - it also has a MAC address, which other ISPs may require you register.
(the ADSL modem has a MAC address too, but it's not used by my ISP). When you use the ISPs software to set up the connection that's done automatically. You can connect any networking device to the modem without having to fuss with re-registering anything, and the ISP is not concerned with whatever MAC address the router is set to if you're using one. You only have to re-register the serial number if you change which cable modem you are using.

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