Linksys Wireless Router WRT54G Problem

Did the problem occur before or after you upgraded your router's firmware?

Before. One of the first things Linksys and the various forums said was to ensure that the firmware was up to date.

It seems like a DNS problem.

try to ping a domain (ping wanadoo.fr). You should receive 4 reply's.

If you receive the IP of wanadoo.fr, your DNS is working.

i tried to ping yahoo.com but received no reply at all.

So, what does this mean ?

Two LEDs come up, the power LED and the Internet LED. I tried powering everything down and up to no avail.

As indicated previously, configuring the router via wireless access is possible, so the connection there is fine. It's just internet access beyond that that fails (except via an ethernet cable).

I'll try the cmd stuff this evening when I get home.

Thanks for the reply, though.

That you've got a connectivity problem. Any other details on what's hooked up where, and what other troubleshooting you've done?

Sorry, I missed the rest of this thread. When you connect the cable modem to the router, do LEDs on each of them come on to indicate that the connection between them is OK? The one on the WRT54g is labelled "Internet", while the one on your cable box is probably "Ethernet" or "PC" or "Data" or something like that.

Try powering everything down, and powering them up in sequence (cable modem, then router, then PC) waiting a minute between units for everything to come up and the lights to stop flashing.

Also, try "Ping 216.109.112.135", and give us the results of "ipconfig/all" in a DOS box.

And what lights up on your cable(?) modem?

So you can talk to the router, but it doesn't seem to talk to your cable modem. That's either because of hardware problems (you indicated that this used to work just fine, yes?), MAC address problems (most cable systems only talk to one true MAC adress, though most of them will look for a new one if you power cycle the cable modem), or some other connectivity problems (cabling, etc).

What does the router's status page show for the Internet? IP address, subnet mask, default gateway, DNS, MTU?

I connect via a cable set-top box. The model doesn't have any extra lights indicating BB internet access unfortunately.

The following is what I get from ipconfig/all

Windows IP Configuration

Host Name . . . . . . . . . . . . : ajg_xch Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Wireless Network Connection 2:

Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Linksys Wireless-G USB Network Adapter Physical Address. . . . . . . . . : 00-0F-66-79-88-E9 Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 192.168.1.100 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.1 DHCP Server . . . . . . . . . . . : 192.168.1.1 DNS Servers . . . . . . . . . . . : 194.168.4.100 194.168.8.100 Lease Obtained. . . . . . . . . . : 16 May 2005 18:31:15 Lease Expires . . . . . . . . . . : 17 May 2005 18:31:15

Again, you may have a MAC address problem, but let's do this methodically:

OK, so you are getting an IP address from the router, and it's passing on the DNS servers to you, that's encouraging.

What's the status page on the router show for a WAN IP address, netmask, default gateway, DNS server, etc?

Apologies for the delay, but we're in different time zones, so it takes me a day to read any replies and then another day to post MY reply. I'll get back on this one tomorrow hopefully.

Apologies for the delay, but we're in different time zones, so it takes me a day to read any replies and then another day to post MY reply. I'll get back on this one tomorrow hopefully.

Soooo.... *you* are the one whose got all the time in the world, eh? That's why I can never find enough time!

It's the story of my life... I rush and work like Hell to get there first, but the greedy bastards always beat me to it.

Shucks.

No problem, we've got all the time in the world. 8*)

Cable provider is NTL WAN IP Address is 81.111.252.165 Mask is 255.255.255.0 Default gateway is 81.111.252.1 Static DNS Servers are 194.168.4.100 and 194.168.8.100 I've got DHCP enabled DDNS Service disabled MAC address cloned Can't remember if I've already said, but I've already tried updating the router firmware to v3.03.6

Today I have also tried lowering the RTS threshold as suggested by linksys.custhelp.com for someone with what appeared to be a similar problem (a good signal and the router status accessible via wireless, but unable to get online)

Looks like it ought to work. Try pinging:

Then try pinging:

router.compusmiths.com spc2-pool2-5-0-gw.cosh.broadband.ntl.com cache1.ntli.net cache2.ntli.net cnn.com

Then try:

tracert cnn.com

Okay, I've tried them all now, with the following results...

The first three all replied

The next three all time out 81.111.252.1

The addresses all replied with "could not find host"

The tracert replied with "unable to resolve target system name"

I also tried the tracert on 81.111.252.165 to see if it worked at all, which it did. So I tried tracert on 81.111.252.1, which replied with

Hopefully, this all means something to you.

Well, right there we know we aren't talking to the gateway on your ISPs network, though it is assigning you an IP address. Very strange. You've either got some MAC address problems or your router is broken.

What do you get for an IP address and default gateway when you connect your computer directly to the cable modem? Can you ping the default gateway in this configuration?

IP Address via cable set-top box is 80.5.244.77 Default Gateway is 80.5.224.1

Both ping successfully.

Is there any way of definitely proving it's the router, without getting a replacement ?