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Can connect to cable modem (gateway), but not Internet. Help?

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#1 jdrakeh


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Posted 14 July 2013 - 08:30 AM

I'm working on an older Windows XP machine (but this issue is not limited to Windows XP, per #3 below). It can connect to my cable modem (gateway) via both LAN and wi-fi, but it can't "see" any further than that. Connecting to the Internet is a total no go. I can't ping anything further than the modem (gateway). 

I've already power cycled the modem (gateway) released and renewed IP, flushed the DNS cache, rebuilt the TCP/IP stack, and re-installed all of the drivers. No joy. I still can only get as far as the cable modem. 

Other information, since I was asked elsewhere: 

1.) All of my other computers can connect to the Internet without issue through the same modem. 

2.) I do not have MAC filtering enabled. 

3.) Also, thinking it may just be Windows XP, I burned a (Puppy Slacko) Linux Live CD, but I'm having the same problem there. 



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#2 jdrakeh

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Posted 14 July 2013 - 08:41 AM

More information:


The modem has a router built-in, which I am using. I do not have another router in the loop. The make/model of the modem is: Arris Interactive, L.L.C. tg862g. I can see/access the modem UI from the problem computer.


Clarification, since the issue was raised elsewhere: I have also performed a full factory reset in addition to the power cycle.


I continue to be able to access the Internet through the modem on two other PCs (one running Windows 7, one running Linux Mint and Windows 7*), as well as through two cell phones, and an Xbox 360. None of those other devices have any issue at all accessing the Internet through the modem. 


*The latter of which I am posting this from. 


#3 Burney


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Posted 14 July 2013 - 09:06 AM

It seems like your network card may be shot if you did a full restore, but I am thinking you may need to just reinstall the network drivers for your LAN and wifi cards.  Also try booting into safe mode with networking and try to connect.

#4 Queen-Evie


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Posted 14 July 2013 - 08:09 PM

For the record, this issue has also been posted here http://forums.comcast.com/t5/Basic-Internet-Connectivity-And/Can-connect-to-my-modem-gateway-via-LAN-and-wi-fi-but-not-the/td-p/1751007


Please post the requested information in the Comcast forum. When I see that you have posted it I will alert a Connection Expert to look at the results. He may be able to help you. There is also the possibility that a non-expert can help you.

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