Ceci est une ancienne révision du document !
Connection from outside of the ENS network
WARNING : Only for your fisrt connection to the
allo-psmn node (whether when connecting from the ENS network of from outside), follow these instructions
To connect with SSH from outside the ENS network, you must use one of the SSH servers of the institution:
ssh.ens-lyon.frif you have an informatic account at ENS de Lyon,- or the
ssh.psmn.ens-lyon.frserver (see infographic):
Legend :
- black : physical link
- blue : standard SSH connection
- red : virtual SSH connection (hop)
- green : NFS links (/home)
Use the following command:
- WITH your ENS de Lyon account, via
ssh.ens-lyon.fr
Your SSH access to ssh.ens-lyon.fr , need to be ACTIVATED, see the ENS documentation.
ssh -X -oProxyCommand="ssh yourlogin@ssh.ens-lyon.fr netcat -w1 allo-psmn %p" yourlogin@allo-psmn.psmn.ens-lyon.fr
Then, you must give your password twice.
yourlogin@ssh.ens-lyon.fr's password : yourlogin@allo-psmn's password :
- WITHOUT a ENS de Lyon account, via
ssh.psmn.ens-lyon.fr
The
ssh.psmn.ens-lyon.fr server is a minimalistic gateway without access to your /home directory at PSMN. You only have enough space to copy your SSH public key and some configuration files (ssh/config, alias, …).
Two-steps connection:
ssh yourlogin@ssh.psmn.ens-lyon.fr yourlogin@ssh.psmn.ens-lyon.fr's password : $ ssh yourlogin@allo-psmn.psmn.ens-lyon.fr yourlogin@allo-psmn's password :
One-step connection:
ssh -X -oProxyCommand="ssh yourlogin@ssh.psmn.ens-lyon.fr netcat -w1 allo-psmn %p" yourlogin@allo-psmn.psmn.ens-lyon.fr
Then, you'll have to give your password twice:
yourlogin@ssh.psmn's password : yourlogin@allo-psmn's password :
and you are connected to allo-psmn :
yourlogin@allo-psmn%
Once connected to allo-psmn, you have access to your PSMN home-directory and to your files.
warning,
allo-psmn is a connection server, it allows you to access and transfer your files but that's it
To work oon PSMN cluster you have to connect from
allo-psmn, to one of the front nodes
To do so, use the following command:
ssh -X front_node_name
where front_node_name is the name of one of the front nodes.
Use SSH keys and/or SSH agent
Vous pouvez simplifier votre usage des commandes SSH en utilisant un jeu de clefs, un agent SSH et une configuration adaptée (voir le paragraphe suivant et l'exemple de fichier de configuration).
Si vous disposez d'un jeu de clefs SSH (personnel, avec passphrase), vous pouvez ajouter votre clef publique (id_?sa.pub) au fichier ~/.ssh/authorized_keys.
- pour
ssh.psmn.ens-lyon.fr(home local)
scp ~/.ssh/id_rsa.pub votrelogin@ssh.psmn.ens-lyon.fr:~/.ssh/id_rsa.pub.perso ssh votrelogin@ssh.psmn.ens-lyon.fr cat .ssh/id_rsa.pub.perso >> .ssh/authorized_keys
- pour
allo-psmn(home PSMN)
scp ~/.ssh/id_rsa.pub votrelogin@allo-psmn:~/.ssh/id_rsa.pub.perso ssh votrelogin@allo-psmn cat .ssh/id_rsa.pub.perso >> .ssh/authorized_keys