Losing Internet Connect After a few Minutes

[MindBender77]

Hello All -
I've exhausted all other resources so any feed back will be most helpful. If this question is not in the correct forum, admins please move.

I have an older Compaq Armada laptop and a Zoom cable modem. I can receive an internet connect for about 3 minutes before losing it. My desktop pc, when connected to the same modem has no issue.

My first thought is the IP is not reassigning however, when I release and renew, the connection is not re-established. DCHP is enabled along with autoconfig. For the time being all any virus software has been disabled. Could this be a MAC address issue with my ISP?

Thanks in Advance,
Bender

[sicarie]

Have you taken this issue up with your ISP?

After you lose the connection, what do you see in an ipconfig /all ?

[MindBender77]

Hello sicarie,
No I haven't taken this up with my ISP yet. I wanted to find out more before I do.

As for the ipconfig /all:
I get everything I should, (sorry for not being more descriptive). The lease date is 2 days, IP is assigned.

The oddest symtom is that I can still PING and get responses from like yahoo.com but, get a DNS server not found error when using a browser. Any suggestions?

Bender

[sicarie]

Bender,

If your internet browser isn't configured to use a proxy or anything, it sounds like something weird is happening on your ISP's end (you've paid your bill, right? ;), I'd definitely recommend going to them.

It's possible that port 80 is being blocked for some reason, or there's something that your ISP is doing like filtering 80 through another port, but because some script triggered on the DHCP lease times out it won't accept port 80 traffic from you because it thinks that script failed... I don't know, I'd check your browser and then talk to your ISP.

sicarie

::edit:: when you say you get an IP, is it 192.168.x.x? 10.x.x.x? 172.x.x.?

[JohnSmithIT]

shoulds like dns error.

[MindBender77]

@sicarie
Thanks again for your help sicarie. I think I've narrowed it down to either the ISP or a corrupt antivirus program. The anti-virus keeps giving dll errors and I'm wondering if its the reason that port 80 seems to be blocked. You've given me a starting point so, thanks again.

To answer your question: when I lose connection IP is 192.168 on a PING but, if I open the browser, it tries opening an IP like 63.43.

In the brief moments I do have connection: IE detects proxy (which there isn't one) then opens the page as normal.

I'm tempted to either buy a new laptop, this one was given to me by my father, or to reinstall windoze....

Bender

[sicarie]

Bender, it's always possible that you have a virus - if you're already considering a re-install, I'd make sure your files are backed up and go for it, though I personally work in security and always prefer a clean build.