I have a clean install of Ubuntu 10.04 plugged into our office LAN. Everything works fine except the Internet connection. I can open a couple of Internet pages then my browser starts "waiting" for any page requests. Pinging any public websites also takes long to reply and experiences packet loss greater than 70%. Updating software packeges also fails within a minute or so after started.
I have removed network-manager and installed wicd and problem stays exactly the same.
My /etc/network/interfaces file
auth lo iface lo inet loopback auth eth0 iface eth0 inet dhcp
Any suggestions or other info I can give to nail this issue?