Ethernet Working but No Internet Connection In my office, nearly everybody uses Mac and we have just only one Windows 7 system. Just this morning, all the Mac systems (10.8.2) could not connect to the internet but could connect to the network, but the Windows 7 can reach the internet all connected to same switch.

When I tried pinging the DNS address, it replied but I can not ping www.google.com on any of the Macs. If I try creating a new location for the network and enter all the details manually instead of autoConfig, it connects to the internet for like 30 seconds and then shuts off again. The connection still shows green afterall and could still ping the DNS.

I tried killing the mDNSResponder but still same issue.

NB: We don't use any DNS/Mac Servers. We connect to the switch that connects directly to the router.
I had to state the DNS manually and only one of the two DNS was stated and with that, problem solved.

Thanks