Router can't connect to the internet

[John Lettiere]

I just bought a Linksis WRT54GL wireless router (May 28), and everything was
fine. Upgraded the firmware to the latest version with no trouble.

No problems connecting my two laptops wirelessly, or my desktop via RJ45
cable through the router to my home network, or getting on the internet.

But as of yesterday (June 5) I lost my internet connection.

I tied rebooting both the router and cable modem (Motorola) several times,
but that didn't work, though I still have my home network working, but still
no internet.

I called my cable provider for help, and the tech told me to disconnect the
internet cable from the router and plug that into my desktop as the router
was causing the problem, said something about the router automatically
updating something, I have no idea what the router could have updated?

So I disconnected the internet cable from the router and plugged that cable
into my desktop.

Once I did that I got my internet connection back, but now my two laptops
can't connect to the net through the router, either wirelessly or by RJ45
cable.

I tried hooking up and resetting the router again today, but it still
doesn't see my internet connection.

Outside of something being physically wrong with the router, I'm at a total
loss as to what the problem is.

My OS is Win XP Pro with SR2.

If any one has an answer to this headache it would be much appreciated.

Thanks in advance.

 

[HDRDTD]

One possibility is that your Cable modem is expecting to see the MAC address
of your PC network card.

When you use the wireless router inbetween the PC and the cable modem, the
cable modem now sees the MAC address of the woreless router rather than the
one belonging to the network card in your PC.

There should be a setting in the wireless router that allows you to 'change'
the MAC address of the router to the one in your PC.

 

[kony]

I just bought a Linksis WRT54GL wireless router (May 28), and everything was
fine. Upgraded the firmware to the latest version with no trouble.

No problems connecting my two laptops wirelessly, or my desktop via RJ45
cable through the router to my home network, or getting on the internet.

But as of yesterday (June 5) I lost my internet connection.

Had you changed any router settings?
If you bring up a command prompt (Windows' Start Menu - Run
- "CMD" , then type "ipconfig /all" (this is while
connected through the router, perhaps rebooting the PC first
would be best), does the PC have the router's IP address as
the Gateway, and if you are using it's DHCP server function
is that also the same IP address (it might be 192.168.0.1 or
whatever the default unless you'd changed it )

Does it list DNS servers? Have you tried pinging an IP
address on the internet instead of a domain name? For
example you could (still at command prompt)
"ping yahoo.com"
"ping 216.109.120.203" (which is also a yahoo system,
confirmed to reply to a ping)
Then note whether either go through.

I tied rebooting both the router and cable modem (Motorola) several times,
but that didn't work, though I still have my home network working, but still
no internet.

Does your modem have a browser interface? Some Motorolas
can be accessed at (if you haven't changed the defaults of
anything),
http://192.168.100.1/
If you can access a modem there, see if there is a Status
page, a Signal page, and/or a Log. Note anything that seems
out of order on these pages and for the signal it should be
an upstream value of at least 24+dBmV (might not be required
to be this high but it would be expected) and downstream of
at least -15 dBmV (any lower and it could be a problem). If
your downstream is lower, you might have bad cabling or too
many splitters before the modem. Ideally you would have no
splitters but obviously that can't be the case unless you
have absolutely nothing else hooked up to cable (no TVs,
etc), otherwise the fewer the # of splitters the better.

I called my cable provider for help, and the tech told me to disconnect the
internet cable from the router and plug that into my desktop as the router
was causing the problem, said something about the router automatically
updating something, I have no idea what the router could have updated?

If your router is using it's defaults you probably have a
browser interface for it as well. Some default to
http://192.168.0.1/
but check your manual if that isn't it. If it appears you
have the right IP address and can't bring it's page up,
power cycle it and compare your PC's LAN IP address to see
if in same range. If you can access it, note any
information that seems significant.

So I disconnected the internet cable from the router and plugged that cable
into my desktop.

Once I did that I got my internet connection back, but now my two laptops
can't connect to the net through the router, either wirelessly or by RJ45
cable.

Does your cable provider require you register the MAC
address with them? It would seem not, since it worked after
you removed the router but with some cable providers it is
an issue.

I tried hooking up and resetting the router again today, but it still
doesn't see my internet connection.

Basically you need to start at the PC and see how far you
can get. At the PC, ping the router (as above, your router
IP address might be 192.168.0.1, whatever it is, remember
that number). If you can't get a reply from that ping then
note your IP address of the system compared to the router.
Try to open the router browser page and see what it reports,
including the log. Try pinging the modem's IP #, does it
reply? If your modem and/or router have some diagnostic /
status LEDs on them, are the correct ones illuminated?

At the command prompt you could also do a tracert. For
example,
"tracert yahoo.com"
then watch to see where it stops, the last IP address if it
doesn't make it all the way to Yahoo. Similarly tracert the
IP address listed above,
"tracert 216.109.120.203"
and note whether it makes it any further.

Outside of something being physically wrong with the router, I'm at a total
loss as to what the problem is.

Could be something wrong with it. Seems unlikely for it to
fail in a short period of time since it's not old and was
working previously, but not impossible.

 

[John Lettiere]

Had you changed any router settings?

Nope.

If you bring up a command prompt (Windows' Start Menu - Run
- "CMD" , then type "ipconfig /all" (this is while
connected through the router, perhaps rebooting the PC first
would be best), does the PC have the router's IP address as
the Gateway, and if you are using it's DHCP server function
is that also the same IP address (it might be 192.168.0.1

I was thinking of doing this, thanks.

or

whatever the default unless you'd changed it )

No, I haven't changed anything.

I'll give this a shot, and let you know if it worked.

Does it list DNS servers? Have you tried pinging an IP
address on the internet instead of a domain name? For
example you could (still at command prompt)
"ping yahoo.com"
"ping 216.109.120.203" (which is also a yahoo system,
confirmed to reply to a ping)
Then note whether either go through.

I will try this also, thanks.

Does your modem have a browser interface?

Not that I know of.

Some Motorolas

can be accessed at (if you haven't changed the defaults of
anything),
http://192.168.100.1/

I doubt it's the modem since it was working fine with the router for over a
week til yesterday, and the cable company tech saw no problems with it
either, but I'll check.

If you can access a modem there, see if there is a Status
page, a Signal page, and/or a Log. Note anything that seems
out of order on these pages and for the signal it should be
an upstream value of at least 24+dBmV (might not be required
to be this high but it would be expected) and downstream of
at least -15 dBmV (any lower and it could be a problem). If
your downstream is lower, you might have bad cabling or too
many splitters before the modem. Ideally you would have no
splitters but obviously that can't be the case unless you
have absolutely nothing else hooked up to cable (no TVs,
etc), otherwise the fewer the # of splitters the better.

Two splitters, but it's never made a difference in 4 years. Why would it
start now?

The only thing that was changed was the router.

Thank for your help kony, I'll be back with an up date.

--
John Lettiere
JL Computer Services & Consulting
http://perfcomp.homestead.com/Prefcomp2.html
You don't need a weatherman to know which way the wind
blows..............Bob Dylan

 

[DaveW]

It sounds like your router has physically failed. Return it.

 

[Peter]

I just bought a Linksis WRT54GL wireless router (May 28), and everything was
fine. Upgraded the firmware to the latest version with no trouble.

No problems connecting my two laptops wirelessly, or my desktop via RJ45
cable through the router to my home network, or getting on the internet.

But as of yesterday (June 5) I lost my internet connection.

I tied rebooting both the router and cable modem (Motorola) several times,
but that didn't work, though I still have my home network working, but still
no internet.

I called my cable provider for help, and the tech told me to disconnect the
internet cable from the router and plug that into my desktop as the router
was causing the problem, said something about the router automatically
updating something, I have no idea what the router could have updated?

So I disconnected the internet cable from the router and plugged that cable
into my desktop.

Once I did that I got my internet connection back, but now my two laptops
can't connect to the net through the router, either wirelessly or by RJ45
cable.

I tried hooking up and resetting the router again today, but it still
doesn't see my internet connection.

Outside of something being physically wrong with the router, I'm at a total
loss as to what the problem is.

My OS is Win XP Pro with SR2.

If any one has an answer to this headache it would be much appreciated.

Thanks in advance.

Have you tried the following:

Turn off your modem for at least 30 seconds.

Do same for router.

Make sure no router or computers are connected to the cable modem and
switch it on.

Plug network cable from router cable socket to input socket of cable
modem and switch on router.

Plug any/all computers to network socket(s) on router to see if you can
connect.

 

[Peter]

Have you tried the following:

Turn off your modem for at least 30 seconds.

PS: and unplug it completely from its power source.

 

[John Lettiere]

After contacting Linksis and speaking to a very nice young lady named Dipti
who had me reset (which I had done before, but didn't work) the router and
walk me through a few settings everything is back online.

To all who replied to my post, many thanks.


--
John Lettiere
JL Computer Services & Consulting
http://perfcomp.homestead.com/Prefcomp2.html
You don't need a weatherman to know which way the wind
blows..............Bob Dylan