How to access to Modelserver

Overview

To have access to modelserver you need to connect via ssh with port forwarding (using ssh.osupytheas as gateway server).

Requirements

You need an OSU Pytheas account in order to be able to connect to ssh.osupytheas and modelserver.

Set up the SSH config file

If you want more informations about what is done in this step check out this doc.

• If the ~/.ssh/config doesn’t exist you have to create one (vi ~/.ssh/config, nano ~/.ssh/config, …) and add the default options on top of it.

• Then append to the ~/.ssh/config file (make sure to replace [OSUPYTHEAS_USERNAME] by your osupytheas username):

  Host osupytheas
    Hostname ssh.osupytheas.fr
    User [OSUPYTHEAS_USERNAME]
  
  Host modelserver
    Hostname modelserver.cerege.fr
    User [OSUPYTHEAS_USERNAME]
    ForwardX11 yes
    ProxyJump osupytheas
    LocalForward 8111 127.0.0.1:8080
    LocalForward 8222 127.0.0.1:8888
    LocalForward 9999 127.0.0.1:8000
    LocalForward 9998 127.0.0.1:43829
    LocalForward 8788 127.0.0.1:8787
    LocalForward 8090 127.0.0.1:8090
  

• Now you should be able to connect to modelserver via the command line:

  ssh modelserver
  

  When you will connect for the first time, you will get something like:

  The authenticity of host 'rubicon.cerege.fr (193.49.98.9)' can't be established.
  RSA key fingerprint is XXXXXXXXXXXXXXXXXX.
  Are you sure you want to continue connecting (yes/no/[fingerprint])?
  

  • Confirm you want to continue to connect by entering yes.

  • Then you might be prompted to enter your [OSUPYTHEAS_USERNAME]@ssh.osupytheas.fr’s password.

  • Follow the two last steps a second time for your authentication to modelserver and you should land on the server properly.

Copy your SSH key to the servers (not mandatory)

If you want more informations about what is done in this step check out this doc.

In order to avoid to enter your password each time you connect, you can copy your SSH key to the server.

Requirements

Make sure you already have generated a ssh key pair located in ~/.ssh/. If not check this GitHub Documentation to create one.

• Copy your local computer’s SSH key to modelserver’s authorized_keys file:

  ssh-copy-id -o ProxyJump=[OSUPYTHEAS_USERNAME]@ssh.osupytheas.fr [OSUPYTHEAS_USERNAME]@modelserver.cerege.fr
  

  Your modelserver password should be requested once again to authenticate and you will be good to go.