Ssh access to VMs

VMs resides on their own private IP network, but can be accessed through ssh using hades.hevs.ch as a gateway.

Configuring putty or kitty ssh clients for windows is somewhat complicated, and using our prepackaged windows tools is highly recommended. A package is also available for debian-like Linux here.

Manual setup using a standard ssh client

Tested using :

• openssh (the standard ssh client in most GNU/Linux distributions).
• cygwin’s ssh

1. Send your public ssh key to the staff.
   • The file usually resides in ~/.ssh/id_rsa.pub
   • If it does not exist, it can be generated using ssh-keygen -t rsa
2. Once your key has been added on the server, you can connect to your VM using the following command: ssh -o "ProxyCommand ssh sshfwd@hades.hevs.ch -W %h:%p" cluster@VM_IP_ADDRESS
   • VM_IP_ADDRESS can be found on the web interface : > Compute > Instance , in the “IP Address” column
3. Add your ssh public key to the VM ~/.ssh/authorized_keys, so the VM won’t ask the password anymore.

TIP: Do it simpler

Do you want to use a simpler command, like ssh-hades cluster@VM_IP_ADDRESS?

Simply add this line to ~/.bashrc : alias ssh-hades="ssh -o \"ProxyCommand ssh sshfwd@hades.hevs.ch -W %h:%p\"" into your ~/.profile file and use the command.