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Cannot access DSL modem or internet

By efraim ·
A little advise on this would save me tons of time.

I have a small business XP network. 5 computers connected to a switch. All static IP addresses 192.168.1 thru

All running WIN XP PRO

With my DSL modem's address

Here is my problem

One computer lost the abilty to connect to the Web.

It works fine with the LAN but no web.

I can ping all the other computers but not the the DSL modem and not the DNS servers.

I am at my wits end. Settings are identical to all computers. All of them work, but not this one.

This is a DELL dimension 2350. I called DELL. had me three(3)! hours on the phone. Nothing doing.

WIN XP PRO came pre-installed, WO reinstall disk...

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by HAL 9000 Moderator In reply to Cannot access DSL modem o ...

On one of your computers generally the one closest to the Modem you should have a string of settings for the Modem. If that string has become corrupted it will stop anything from one computer to the entire setup connecting to the Internet.

I think that you can talk to Dell till Hell freezes over and you'll never get a fix as I doubt if the problem is connected to the actual computer but it's much more likely the actual Network setup. I take it that you've made sure that the affected computers IP address is not the same as the modems as that is just so obvious.

As th LAN is working I would hazard a guess that the Modem is no longer accepting that particular computer as a recognized computer and stopping it connecting to the Net but because there is a switch before the Modem the LAN has remained intact.

I think that here you are going to have to find that Modem Setup file and correct the problem in it. There is also the very obvious thing of disconnecting both the modem & switch from the mains and allow them to discharge and then power them up again and see if that cures your problem. 20 seconds should be long enough but you have to disconnect both at the same time.


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by efraim In reply to

Very informative but did not help

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by sgt_shultz In reply to Cannot access DSL modem o ...

did you turn off the xp firewall on the affected box for a test

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by efraim In reply to

Box is unchecked - no firewall

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by jdclyde In reply to Cannot access DSL modem o ...

What is your GATEWAY setting?

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by jdclyde In reply to

(see, I told you people would come and help!) = )

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by HereInOz In reply to Cannot access DSL modem o ...

Could be a DNS assignation problem. Just for laughs, try to ping, and then try to ping

If the latter one works but the former one does not, it is a DNS problem, and you need to look further in to that.

Go in to your network connections and make sure that you have set the static IP correctly and you have set the DNS addresses corrreclty - they should be the ones provided by your ISP.

Check the firewall as stated above, in fact, turn off the firewall on that machine for the purpose of testing - put the damn thing back on again afterward.

If you cannot connect to the modem/router from this machine, but can from all the others, it is probable that the IP address in the offending box is wrong, or the firewall is blocking traffic from the modem/router.

Col's idea of a re-boot of the modem/router and the switch is good - many switches and some modem/routers tend to get their knickers twisted if there has been a momentary power cut at some time - not long enough for them to shut down and re-start, just long enough to corrupt their settings.

Hope this helps

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by wlbowers In reply to Cannot access DSL modem o ...

Open a command window and type the following.

ipconfig /all

Now press enter. You should get the ip address, gateway, address, dns address. This is from mine.

IP Address. . . . . . . . . . . . :
Subnet Mask . . . . . . . . . . . :
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . :
DNS Servers . . . . . . . . . . . :
Lease Obtained. . . . . . . . . . : Tuesday, February 21, 2006 2:47:58 AM

Lease Expires . . . . . . . . . . : Wednesday, February 22, 2006 2:47:58AM

Note the lease info. You have to have that.

There will be some other stuff but we only get 2000 char.

If you don't have a gateway you can set it in the network settings for the adapter. the advance tab.

If it was working you can try to do a renew. At the command prompt.

ipconfig /release
ipconfig /renew

I know you should be able to just do the renew. but we are talking about windows here.

Good Luck


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