Wired Connection Connected But Not Working

[chazdg24]

I had a strange situation yesterday. Ubuntu 12.04.4 was connected to the internet but was not working. I logged into Windows 7 and my internet worked fine. I found a boat load of information for such an event on Google. Unfortunately nothing worked. Today Ubuntu works fine.

Any ideas what could have happened? I would need to log in to Windows to give specific websites I visited and trouble shooting I did. Thanks to everyone.

[chazdg24]

Bump, any ideas?

[varunendra]

When (and IF) it happens again, post back the outputs of -

sudo lshw -numeric -C network -sanitize
ifconfig -a
route -n
nm-tool
ping -c4 <your gateway or router's IP>

It is hard to make a guess, but it could be a DNS or routing issue, or maybe just a DHCP or even physical connection issue. You rebooted, and whatever was stuck got reset - just a guess.

[chazdg24]

When (and IF) it happens again, post back the outputs of -

sudo lshw -numeric -C network -sanitize
ifconfig -a
route -n
nm-tool
ping -c4 <your gateway or router's IP>

It is hard to make a guess, but it could be a DNS or routing issue, or maybe just a DHCP or even physical connection issue. You rebooted, and whatever was stuck got reset - just a guess.

I will do that, thanks! Still working today. I never had an issue with any Linux installation like that.

I did have a similar issue with Win 7 and had to reset the TCP stack.