LAN works, internet doesn't, tried everything

[claytonosmus]

I put together a new computer today, and installed Windows XP with SP2 slipstreamed, got it up and running and everything seemed fine. The network was working, as was the internet. It is connected to a LAN along with a few other computers, which is connected to a DSL router.

I installed a few applications, an anti-virus program and java runtime. After I rebooted the computer, the internet no longer worked. I could see and browse other networked computers, I could connect to the router, I could ping myself, but I could not connect to the internet. So I researched it on one of the other computers, which all work fine. I uninstalled the anti-viri program and java runtime as those were my first suspects, and I reset the TCP/IP stack. Then it worked again. Hurray! But not for long. After a reboot or two, the problem returned. I have since then tried everything from resetting the tcp/ip stack, to using winsockfixxp, to manually resetting the stack/removing reg keys/reinstalling TCP/IP. NOTHING has worked now. It no longer connects to the internet ever. First it was just randomly being problematic, and now it just refuses to connect to the internet.

Again, the LAN works fine, I can see and browse other computers, I can connect to the router, there is no firewall on, its set to automatically obtain an IP, I can ping myself. I just cannot connect or ping to internet addresses. Does anyone have any ideas why this is, or why this even happened in the first place. At this point I just want to format and reinstall Windows, but I am worried it will only happen again and I will be wasting hours of my time.


Thanks for your help

 

[bcastner]

Paste back here the results of an ipconfig /all

 

[Serbtastic]

It sounds to me like your router is assigning its own IP as the DNS server address, and then not passing DNS requests along to actual DNS servers.

Try hard coding your DNS server address and see if it resolves it.

 

[LloydSev]

Where did you see anything that might sound like that Serbtastic? Maybe I missed it.

However, try opening up a command prompt and type "ping 64.233.167.147"

Do you get a response?

Also, like bcastner said, post an "ipconfig /all" for us also.

Computer/Network Technician
CCNA

 

[Serbtastic]

Well, I've seen this same issue whereby the DNS requests are not propogated by the router many times before, and without more info (as in ipconfig /all output) this is my best guess.

 

[Kaycek]

Also, do you have the right gateway address? if the gateway addy isn't the same it won't work. I also set my router ip so that only the MAC addresses of my nics are allowed through, by any chance have you checked that setting?

kaycek