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:
- The
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
You can simplify your usage of SSH commands by using a set of keys, an SSH agent and a suitable configuration (see this documentation) and this example configuration file).
If you have a set of SSH keys (personal, with passphrase), you can add your public key (id_?sa.pub) to the ~/.ssh/authorized_keys file.
- for
ssh.psmn.ens-lyon.fr(home local)
scp ~/.ssh/id_rsa.pub yourlogin@ssh.psmn.ens-lyon.fr:~/.ssh/id_rsa.pub.perso ssh yourlogin@ssh.psmn.ens-lyon.fr cat .ssh/id_rsa.pub.perso >> .ssh/authorized_keys
- for
allo-psmn(home PSMN)
scp ~/.ssh/id_rsa.pub yourlogin@allo-psmn:~/.ssh/id_rsa.pub.perso ssh yourlogin@allo-psmn cat .ssh/id_rsa.pub.perso >> .ssh/authorized_keys