What causes partial connectivity through wireless adapter (no internet, but can see other home network PC)?

I recently bought an Asus X401A laptop. For some reason, I cannot get internet access on the wireless connection. The wireless connection succeeds and I can see other computers on the network once connected. If I run ipconfig, I get a good IP and the default gateway is right.

Some info that may help:

Running Windows 8 (Had the problem when it was Windows 7, but thought upgrading may help)
Comcast is my ISP and I'm using the router that they supplied
Connecting with an ethernet cable works fine and does allow for internet connectivity.
Authentication is WPA2/AES, but tried with no authentication as well
The default gateway is 10.0.0.1
Network adapter is by RaLink
Tried getting latest version of RaLink driver
Windows 8 install switched network adapter driver. Now uses Microsoft driver
Windows network troubleshooter does not solve the problem (just says default gateway unreachable)
Tried to connect at a public wifi hotspot and it worked just fine
Have several other devices connected (pc, ipad, ipod, tv, wii, phone, etc...) to the same router with no problem
Tried rebooting the router
Tried resetting router to defaults
Confirmed that there is no mac address filtering enabled
When connected, network comes up as unidentified and I'm never given the option to designate the network as a Home network
Pinging the default gateway times out
Tracert to the gateway IP returns "Destination host unreachable"
USB wifi adapter from the same laptop works fine
Turned off IPV6 for the adapter
Tried manually setting all of the IPV4 configuration (default gateway, dns servers, etc..)

Any suggestions would be appreciated.

Paul G

Posted 2012-10-29T02:23:22.320

Reputation: 111

2You forgot to describe the problem! Your question says something about a default gateway not found, but your problem description says that default gateway is right. So what's the actual problem? Can you ping the gateway? Can you traceroute out by IP address? What goes wrong? – David Schwartz – 2012-10-29T02:35:04.927

Generally, If a wired connection works but a wireless doesn't, it could be a driver issue. – Jay – 2012-10-29T03:15:34.480

@DavidSchwartz - Thanks for the reply. The root problem is that I have no internet connectivity when I'm connected wirelessly. The windows troubleshooter returned the response that the default gateway is unreachable, but if I run ipconfig I see the correct default gateway listed. If I ping the gateway IP, it times out. Tracert for the gateway IP returns destination host unreachable. – Paul G – 2012-10-29T10:19:41.330

@Jay - I thought so too, but I've updated the RaLink driver to the latest. That didn't work. I've also used the windows supplied driver and that didn't work. Wireless also works with internet on other networks. – Paul G – 2012-10-29T10:41:16.763

Answers

The problem turned out to be that RaLink wireless adapter is incompatible with the Arris router/modem that Comcast provided. I eventually found someone at Comcast that comfirmed that this was a known issue with the Arris router model that I was given and that they were waiting on a firmware update from Arris. I bought a Motorola SurfBoard, turned in my rental router/modem, and connected a NetGear wireless router and all is well.

Paul G

Posted 2012-10-29T02:23:22.320

Reputation: 111

With all the tests you have done, one has to conclude that your computer's wireless adapter just cannot manage to work with your router. I hope you have tested with the computer in the same room as the router.

If the wireless adapter has any way to set parameters, maybe using a manufacturer utility that came with the computer, then do so. Or such a utility may be available for download on the manufacturer's website.

Otherwise, try changing some parameters on the router, such as channel or security settings. You could also try using some other router and see if this works.

Try also to turn off the Windows firewall, just in case.

If all fails and if the computer is still under warranty, ask the vendor for the wireless adapter to be replaced.

harrymc

Posted 2012-10-29T02:23:22.320

Reputation: 306 093

Though I would suspect the router at home first. I am experiencing a similar issue and I have determined it is my router as I have the same problem with multiple computers on the same cable. – Sarge – 2012-11-08T17:20:19.480

Better also check if a firmware update exists for the router. – harrymc – 2012-11-11T09:22:43.197

@harrymc - Thanks for your response. I've tried every combination of router and wireless adapter settings that I could find. I've started to find several posts in various places online that indicate that there is a problem with the communication betweek Ralink adapters and this particular Arris modem/router that Comcast supplied. I'm going to see if comcast will push me a firmware update or replace the router. Plan B will be to go buy a modem/router and turn in the rented one from Comcast. – Paul G – 2012-11-12T19:08:31.833

Have you tested with no encryption (clear) ? – harrymc – 2012-11-12T19:16:47.153

@harrymc - Yes I have. Same result. Thank you. – Paul G – 2012-11-13T18:27:45.613

Maybe another suggestion would be MAC address filtering. On my router, in order for a device to connect to the router using Wi-Fi signal, the wireless network adapter's MAC address has to be entered into the router's configuration page. Most of the time, MAC address filtering is not on by default, so unless you turned on MAC address filtering, this probably wouldn't be the solution. But, worth a shot.

user76275

Posted 2012-10-29T02:23:22.320

Reputation:

Thanks H3br3wHamm3r81. I did check the MAC address filtering. It was not enabled. – Paul G – 2012-11-12T19:04:34.090

I suspect your wifi adapter is not win8 compatible/supported. I suspect the cure is to downgrade the operating system, or upgrade the wifi adapter, until you have a matched pair. Good Luck....

Bill

Posted 2012-10-29T02:23:22.320

Reputation: 11