Lost connection over wired LAN - wireless OK

All of a sudden I have lost connectivity to the internet (ie on the external link) when I try to access through any of the wired ports. LAN access is fine (I am using it to type this). So I know that my modem is ok, my adsl link is ok, my network setup is ok. I can access (over the wired links) the barricade control panel, and through it, to the modem control panel - but no further. I can communicate between PCs linked to the barricade. Just happened suddenly last night - came back from a meeting to find the external connectivity had just died. Any help will be a life-saver! Thanks. GG

geofrog Sep 15, 2007

Thanks hughv. Yes, I had tried bypassing the router, and confirmed that in that case I had full access.

I eventually solved the problem, once I had eliminated the red herring of the access throught he wireless link. Turned out the router had "lost" its DNS setting, and as I only access sites via DNS entries, this caused the apparent failure. The reason I could get access over the wireless link was that the PC was using a company VPN, and so it was using a different DNS, accessed directly via IP address. The fact that it was on the wireless port was, of course, irrelevant.

I appreciate your response.

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196 Answers

A common fix is to re-set the modem. Just unplug the power to the modem for 30 seconds, then re-connect it. You could also bypass the router momentarily to see if the modem is working. Just connect one of the computers directly to the modem to verify connectivity. Your control panel should also have a utility to renew the IP address.

Posted on Sep 14, 2007

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