Despite the network (configured as NAT -- default on VBox) works fine for some time, it suddenly stops working. Running netconfig or changing the MAC address and deleting /etc/udev/rules.d/70-persistent-net.rules didn't solve the issue. Changing network adapter type Bridge solves the problem, but only until the VM is rebooted.
And for some reason the 32-bits VM on the same host doesn't show any problem.
The strangest part is that restoring a snapshot of the VM where the network was fine shows the VBox message "The network connection has been disconnected.", and then the $HOSTNAME reverts to default hostname (darkstar.example.net). The /etc/HOSTNAME and /etc/hosts also return to the default content.
I found a workaround in Cisco Support Community and superuser:
Code: Select all
VBoxManage modifyvm "VM name" --natdnshostresolver1 on
Hopefully posting this here will make it easier for other Salix users who face this issue.