What Could Cause the Ethernet to not Connect to Internet, Yet Connect to Devices on Network

I don't have enough reputation yet to add comments above, so I'll put my questions here:

  • How does your MBP get the IP address for its ethernet interface? DHCP? Manually?
  • What is your default router set to (netstat -rn)?
  • Can you resolve, say, google.com (nslookup www.google.com)?
  • Can you ping any/all the servers mentioned in /etc/resolv.conf?

That should help to debug.

Thanks.