I'm running a VM using Oracle's VirtualBox. The OS is the latest version of Arch, 64-bit.
For some odd reason, every so often (frequently enough to be very annoying and making it almost impossible to get work done) my SSH connection just drops with "Server unexpectedly closed connection".
I have another server running almost exactly the same way, but it is not a VM. I am able to hold a connection with it just fine. So my thinking is it has something to do with VirtualBox not behaving.
How can I start debugging this?
EDIT: I am connecting from the base machine (Win 7) to the VM using PuTTy.