VirtualBox NAT on Ubuntu 13.04 intermittently broken

[Jeremy McMillan]

Guest can typically ARP, DHCP, but after that ARP resolution fails, ergo networking stops (unable to ping default gateway). Without intervention, it will start working again, and then intermittently stop working.

This affects both Oracle and Ubuntu provided VirtualBox 4.2.x versions since 14.

NIC trace pcaps show guest packets transmitting ARP, but not getting any response from the virtual NAT gateway. Then for unknown reasons it starts working for a while.

See ​https://forums.virtualbox.org/viewtopic.php?f=7&t=56962

[vasily Levchenko]

Could you please attach log file?

[Jeremy McMillan]

Replying to Hachiman:

Could you please attach log file?

Thanks. I wasn't sure whether I would need to provide log, NIC trace pcap, corefile, or some combination of those.

[Valery Ushakov]

Do you have MS iSCSI service started in the Windows guest per chance?

This should have been fixed in 4.3.12.