Things to try when VirtualBox networking messes up
This is really a note-to-self but it might help other people too.
I have two network interfaces in my Ubuntu guest (on OS X 10.4 host), one NAT, one host-only.
Sometimes one of them doesn’t get an IP address — in ifconfig it has an inet6 address but not an inet address.
Today I tried
sudo dhclient eth1
and it [...]