I've found and solved the problem. That machine has two NICs, both
gigabit; one is an nVidia gigabit NIC built into its nForce4 chipset,
the other a Marvell Yukon 88E8053 PCI-E gigabit NIC built onto the
motherboard. I switched ther machine's network connection to the
Marvell Yukon, and the
Any other users who run into this problem on similar
hardware might want
to try using a non-nForce NIC.
Did you have the firewall software turned on??
I have nForce NICs on several Opteron and Athlon64s
with no problems after disabling the nVidia firewall
which was preventing me from