How to SSH into CS6340's Virtual Box

ssh_to_virtualbox.md

Setup:

1. Download the course .ova file and import it into the VirtualBox manager with File -> Import Appliance.
2. Follow this tutorial: https://stackoverflow.com/questions/5906441/how-to-ssh-to-a-virtualbox-guest-externally-through-a-host to configure port forwarding on the VM. This is the critical resource!
   • secondary resource: https://unix.stackexchange.com/questions/145997/trying-to-ssh-to-local-vm-ubuntu-with-putty

On the VM:

1. Start the VM in the VirtualBox manager.
2. Run sudo apt install sshd. It will automatically start.
3. I had to create RSA keys with ssh-keygen
   • https://askubuntu.com/questions/639983/sshd-could-not-load-host-key
   • https://confluence.atlassian.com/bitbucketserver/creating-ssh-keys-776639788.htm
4. Run sudo service ssh restart.
   • https://www.attachmate.com/documentation/rsit-unix-802/rsit-unix-guide/data/rsit_unix_run_server_pr.htm
   • https://www.cyberciti.biz/faq/howto-start-stop-ssh-server/

On the host machine:

1. Wait awhile for the VM to boot up.

2. When starting VM, Windows security alert pops up, click allow on private network.

3. Run ssh -p 3022 cs6340@127.0.1.1 -vvv.

    username: cs6340
    password: student
   

Connection troubleshooting references:

• https://unix.stackexchange.com/questions/128894/ssh-exchange-identification-connection-closed-by-remote-host-not-using-hosts-d
• https://www.linuxquestions.org/questions/linux-networking-3/can%27t-ssh-to-remote-machine-connection-closed-by-remote-host-267052/
• https://linuxize.com/post/how-to-enable-ssh-on-ubuntu-18-04/