I would like to SSH into my host (Kubuntu 12.04 64 bit) machine from a VirtualBox guest running Ubuntu 12.04 32 bit. The host has the latest VirtualBox from the Ubuntu repos (4.1.12). The guest was a preconfigured VM I downloaded from VirtualBoxImages.com.
The problem is that my sshd_config does not allow login except with PubkeyAuthentication and I need to be able to use PasswordAuthentication from this VirtualBox guest (for reasons that are probably outside the scope of this question).
my /etc/ssh/sshd_config file probably needs to look like this:
PasswordAuthentication no Match Address 192.168.56.0/24 PasswordAuthentication yes
When I add the match block to sshd_config, ssh terminates with a message like this: init: ssh main process (7352) terminated with status 255
Why? What am I doing wrong? I have used match blocks almost identical to that in the past, so I'm baffled.
This question is relevant but it didn't help me: How can I allow SSH password authentication from only certain IP addresses?
I can guess my issue might be related to the VirtualBox network interface...
In VirtualBox I'm using "Host Only" for Adapter 1 (with the default vboxnet0). With this, the host has an interface vboxnet0 with IP 192.168.56.1. That's the reason for my match block IP address above.
(I also set up Adapter 2 as "NAT" so my guest can have outside Internet access). For testing I set Promiscuous mode to "Allow All." I can ping both ways. And I can SSH from the host to the guest (the opposite way of the connection I want).
The host runs denyhosts, but while testing I stopped that service.