Bob Chiodini wrote:
ethtool eth0 (as root) might also shed some light. Verify that the port speed and duplex are the same as those on the D-Link.
That's a good idea. Another thing that can be illuminating is mtr (my traceroute), it's a lot better than normal traceroute. Give it a try (as root) on, for example, www.smh.com.au
mtr www.shm.com.au and see if there is a hint where any packetloss is being introduced. -Andy